Log in

Relevant bibliographies by topics / Halides. Metal halides / Journal articles

To see the other types of publications on this topic, follow the link: Halides. Metal halides.

Journal articles on the topic 'Halides. Metal halides'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Halides. Metal halides.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Petko, Dina, Samuel Koh, and William Tam. "Transition Metal-Catalyzed Reactions of Alkynyl Halides." Current Organic Synthesis 16, no. 4 (July 4, 2019): 546–82. http://dx.doi.org/10.2174/1570179416666190329200616.

Full text

Abstract:

Background: Transition metal-catalyzed reactions of alkynyl halides are a versatile means of synthesizing a wide array of products. Their use is of particular interest in cycloaddition reactions and in constructing new carbon-carbon and carbon-heteroatom bonds. Transition metal-catalyzed reactions of alkynyl halides have successfully been used in [4+2], [2+2], [2+2+2] and [3+2] cycloaddition reactions. Many carbon-carbon coupling reactions take advantage of metal-catalyzed reactions of alkynyl halides, including Cadiot-Chodkiewicz, Suzuki-Miyaura, Stille, Kumada-Corriu and Inverse Sonogashira reactions. All the methods of constructing carbon-nitrogen, carbon-oxygen, carbon-phosphorus, carbon-sulfur, carbon-silicon, carbon-selenium and carbon-tellurium bonds employed alkynyl halides. Objective: The purpose of this review is to highlight and summarize research conducted in transition metalcatalyzed reactions of alkynyl halides in recent years. The focus will be placed on cycloaddition and coupling reactions, and their scope and applicability to the synthesis of biologically important and industrially relevant compounds will be discussed. Conclusion: It can be seen from the review that the work done on this topic has employed the use of many different transition metal catalysts to perform various cycloadditions, cyclizations, and couplings using alkynyl halides. The reactions involving alkynyl halides were efficient in generating both carbon-carbon and carbonheteroatom bonds. Proposed mechanisms were included to support the understanding of such reactions. Many of these reactions face retention of the halide moiety, allowing additional functionalization of the products, with some new products being inaccessible using their standard alkyne counterparts.

APA, Harvard, Vancouver, ISO, and other styles

2

Karaman, Ali, Zehra Akdeniz, and Mario P. Tosi. "Transferable Deformation-Dipole Model for Ionic Materials." Zeitschrift für Naturforschung A 62, no. 5-6 (June 1, 2007): 265–69. http://dx.doi.org/10.1515/zna-2007-5-606.

Full text

Abstract:

A model for the ionic interactions in polyvalent metal halides was originally built for chloroaluminate clusters using an analysis of data on static and dynamic structure of their molecular monomers [for a review see M. P. Tosi, Phys. Chem. Liquids 43, 409 (2005)]. Recently, by continuing the deformation-dipole model calculations, the transferability of the halogen parameters was tested through the calculation of the structure of alkali halides and alkaline-earth halides. In this work we test the usefulness of the deformation-dipole model in the study of ionic materials by examining the transferability of the overlap parameters for the halogen ions across families of halide compounds. Following a comparative discussion of alkali and alkaline-earth halide monomers near equilibrium, results on alkaline-earth halides are given. By using the transferable ionic potential model we also calculate the equilibrium structure of the molecular clusters, as well as the vibrational frequencies of ACl4 compounds (where A = U, Np, Pu, Am and Th).

APA, Harvard, Vancouver, ISO, and other styles

3

Kumar, Vineet, and Zhiping Luo. "A Review on X-ray Excited Emission Decay Dynamics in Inorganic Scintillator Materials." Photonics 8, no. 3 (March 4, 2021): 71. http://dx.doi.org/10.3390/photonics8030071.

Full text

Abstract:

Scintillator materials convert high-energy radiation into photons in the ultraviolet to visible light region for radiation detection. In this review, advances in X-ray emission dynamics of inorganic scintillators are presented, including inorganic halides (alkali-metal halides, alkaline-earth halides, rare-earth halides, oxy-halides, rare-earth oxyorthosilicates, halide perovskites), oxides (binary oxides, complex oxides, post-transition metal oxides), sulfides, rare-earth doped scintillators, and organic-inorganic hybrid scintillators. The origin of scintillation is strongly correlated to the host material and dopants. Current models are presented describing the scintillation decay lifetime of inorganic materials, with the emphasis on the short-lived scintillation decay component. The whole charge generation and the de-excitation process are analyzed in general, and an essential role of the decay kinetics is the de-excitation process. We highlighted three decay mechanisms in cross luminescence emission, exitonic emission, and dopant-activated emission, respectively. Factors regulating the origin of different luminescence centers controlling the decay process are discussed.

APA, Harvard, Vancouver, ISO, and other styles

4

van Erk, W. "Transport processes in metal halide gas discharge lamps." Pure and Applied Chemistry 72, no. 11 (January 1, 2000): 2159–66. http://dx.doi.org/10.1351/pac200072112159.

Full text

Abstract:

An overview is given of transport reactions and corrosion phenomena in metal halide gas discharge lamps filled with a mixture of alkali halides with scandium or rare-earth iodides. The phenomena that are discussed are: (a) pressures of light-emitting species above the molten salt mixture, (b) interaction of the metal halides with the vessel wall, quartz glass as well as polycrystalline alumina, (c) transport processes along the vessel wall giving rise to wall corrosion, and (d) transport to and from the electrodes (i.e., electrode corrosion and wall blackening).

APA, Harvard, Vancouver, ISO, and other styles

5

Šídlo, Michal, Přemysl Lubal, and Pavel Anzenbacher. "Colorimetric Chemosensor Array for Determination of Halides." Chemosensors 9, no. 2 (February 18, 2021): 39. http://dx.doi.org/10.3390/chemosensors9020039.

Full text

Abstract:

The halide anions are essential for supporting life. Therefore, halide anion analyses are of paramount importance. For this reason, we have performed both qualitative and quantitative ana- lyses of halides (chloride, bromide, iodide) using the Tl(III) complex of azodye, 4-(2-pyridylazo)re- sorcinol (PAR), a potential new chemical reagent/sensor that utilizes the substitution reaction whereas the Tl(III)PAR complex reacts with a halide to yield a more stable thallium(III)-halide while releasing the PAR ligand in a process accompanied by color change of the solution. The experimental conditions (e.g., pH, ratio metal ion-to-ligand ratio, etc.) for the substitution reaction between the metal complex and a halide were optimized to achieve increased sensitivity and a lower limit of detection (chloride 7 mM, bromide 0.15 mM, iodide 0.05 mM). It is demonstrated that this single chemosensor can, due to release of colored PAR ligand and the associated analyte-specific changes in the UV/VIS spectra, be employed for a multicomponent analysis of mixtures of anions (chloride + bromide, chloride + iodide, bromide + iodide). The spectrophotometric data evaluated by artificial neural networks (ANNs) enable distinguishing among the halides and to determine halide species concentrations in a mixture. The Tl(III)-PAR complex was also used to construct sensor arrays utilizing a standard 96-well plate format where the output was recorded at several wavelengths (up to 7) using a conventional plate reader. It is shown that the data obtained using a digital scanner employing only three different input channels may also be successfully used for a subsequent ANN analysis. The results of all approaches utilized for data evaluation were similar. To increase the practical utility of the chemosensor, we have developed a test paper strip indicator useful for routine naked-eye visual determination of halides. This test can also be used for halide anion determination in solutions using densitometer. The methodology described in this paper can be used for a simple, inexpensive, and fast routine analysis both in a laboratory as well as in a field setting.

APA, Harvard, Vancouver, ISO, and other styles

6

Cheng, Lu, Chang Yi, Yunfang Tong, Lin Zhu, Gunnar Kusch, Xiaoyu Wang, Xinjiang Wang, et al. "Halide Homogenization for High-Performance Blue Perovskite Electroluminescence." Research 2020 (December 24, 2020): 1–10. http://dx.doi.org/10.34133/2020/9017871.

Full text

Abstract:

Metal halide perovskite light-emitting diodes (LEDs) have achieved great progress in recent years. However, bright and spectrally stable blue perovskite LED remains a significant challenge. Three-dimensional mixed-halide perovskites have potential to achieve high brightness electroluminescence, but their emission spectra are unstable as a result of halide phase separation. Here, we reveal that there is already heterogeneous distribution of halides in the as-deposited perovskite films, which can trace back to the nonuniform mixture of halides in the precursors. By simply introducing cationic surfactants to improve the homogeneity of the halides in the precursor solution, we can overcome the phase segregation issue and obtain spectrally stable single-phase blue-emitting perovskites. We demonstrate efficient blue perovskite LEDs with high brightness, e.g., luminous efficacy of 4.7, 2.9, and 0.4 lm W-1 and luminance of over 37,000, 9,300, and 1,300 cd m-2 for sky blue, blue, and deep blue with Commission Internationale de l’Eclairage (CIE) coordinates of (0.068, 0.268), (0.091, 0.165), and (0.129, 0.061), respectively, suggesting real promise of perovskites for LED applications.

APA, Harvard, Vancouver, ISO, and other styles

7

Han, Dan, Hongliang Shi, Wenmei Ming, Chenkun Zhou, Biwu Ma, Bayrammurad Saparov, Ying-Zhong Ma, Shiyou Chen, and Mao-Hua Du. "Unraveling luminescence mechanisms in zero-dimensional halide perovskites." Journal of Materials Chemistry C 6, no. 24 (2018): 6398–405. http://dx.doi.org/10.1039/c8tc01291a.

Full text

Abstract:

Zero-dimensional (0D) halides perovskites, in which anionic metal-halide octahedra (MX₆)⁴⁻ are separated by organic or inorganic countercations, have recently shown promise as excellent luminescent materials.

APA, Harvard, Vancouver, ISO, and other styles

8

Yang, S. H., C. S. Li, and C. H. Cheng. "Halide exchange reactions between aryl halides and alkali halides catalyzed by nickel metal." Journal of Organic Chemistry 52, no. 4 (February 1987): 691–94. http://dx.doi.org/10.1021/jo00380a041.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Cecchi, Teresa, Paolo Passamonti, and Filippo Pucciarelli. "Effect of Alkali Halides Upon Photocurrent Due to Emission of Electrons from Dropping Mercury Electrode Into Water." Collection of Czechoslovak Chemical Communications 67, no. 4 (2002): 439–53. http://dx.doi.org/10.1135/cccc20020439.

Full text

Abstract:

When dropping mercury electrode (DME) dipped in ultrapure water, thoroughly deaerated with pure hydrogen, is irradiated with UV light, we can observe a cathodic photocurrent in the non-faradaic region of the polarographic curve, in the absence of scavengers of hydrated electrons. Newly we have followed the effect on photocurrent of initial very small additions of alkali metal chlorides to pure water. By repeated experiments, we could show that first additions of the alkali metal halides increase the photocurrent and that the already known suppression of photocurrent by addition of halides begins only after the halide concentration exceeds ca 10-4 mol l-1. We could show for the first time that in ultrapure water and dilute electrolyte solutions, the photocurrent follows a modified seven-halves law. The extent of the positive effect of small additions of alkali metal halides on photocurrent depends on the nature of each alkali metal cation. The reason for this specificity is discussed.

APA, Harvard, Vancouver, ISO, and other styles

10

Kovbasyuk, Larisa A., Olga Yu Vassilyeva, Vladimir N. Kokozay, Wolfgang Linert, and Paul R. Raithby. "A Mixed-metal Mixed-halide Complex Prepared from Zerovalent Copper and Lead Salts: Solution and Solid-state Chemistry." Journal of Chemical Research 23, no. 11 (November 1999): 670–71. http://dx.doi.org/10.1177/174751989902301117.

Full text

Abstract:

The mixed-metal mixed-halide complex [CuPbBrlL2]2 has been prepared by the direct interaction of zerovalent copper with lead halides and 2-dimethylaminoethanol (HL) in dmso and has been characterized by X-ray crystallography; the structure shows a layer arrangement of the tetranuclear metal units through the μ3-halogen bridging.

APA, Harvard, Vancouver, ISO, and other styles

11

Kumar, Kuldeep, and P. Arun. "SPR in Cesium Halide Thin Films Due to Embedded Elliptic Cesium Metal Nano-Particles." Ukrainian Journal of Physics 63, no. 9 (September 24, 2018): 824. http://dx.doi.org/10.15407/ujpe63.9.824.

Full text

Abstract:

Cesium nanorods embedded in cesium halides (CsCl, CsBr, and CsI) show surface plasmon resonance (SPR) absorption peaks. The size and shape of these cesium nanorods in the cesium halide matrix evolve with time, which gives some uncontrollable data for comparing with the theory. The theory used here was developed by R. Gans. It leads to the good match between experiment and theory for Cs–Cs halide nanocomposites.

APA, Harvard, Vancouver, ISO, and other styles

12

El Hefnawy, Somia M. "ESR Study on Polyvinylidene Fluoride Doped with Transition Metal Halides." Advanced Materials Research 428 (January 2012): 94–99. http://dx.doi.org/10.4028/www.scientific.net/amr.428.94.

Full text

Abstract:

The main goal of this research is studying the crystal structure and formation of both free radicals and trapped space charges in the pure and doped polyvinylidene fluoride (PVDF) films with various concentrations of transition metal halides TMHs (AlCl3, ZnCl2, and CoCl2). Electron Spin Resonance (ESR) was used to detect the existence of free radicals and the probable magnetic interactions between the halide and PVDF. The hyperfine splitting of the ESR was used to study the electronic structure of the existence radicals. Thermally stimulated dielectric response measurements have been made using Frequency Resolved Dielectric Spectroscopy (FRDS). This was useful for studying the formation and trapping of the space charge to enhance the results obtained by ESR. The new crystalline structures and the complex compounds which may be developed due to the chemical reaction between the polymer and the added halides were analysid.

APA, Harvard, Vancouver, ISO, and other styles

13

Du, Mao-Hua. "Zero-dimensional metal oxide Li4TiO4." Journal of Materials Chemistry C 7, no. 19 (2019): 5710–15. http://dx.doi.org/10.1039/c9tc00197b.

Full text

Abstract:

Low-dimensional metal halides have recently emerged as promising luminescent materials; however, chemical and thermal instabilities of halides present challenges to their practical applications. This work extends the current research on low-dimensional metal halides to oxides with improved stability and new functionalities.

APA, Harvard, Vancouver, ISO, and other styles

14

Mei, Tian-Sheng, Yue-Gang Chen, Xue-Tao Xu, Kun Zhang, Yi-Qian Li, Li-Pu Zhang, and Ping Fang. "Transition-Metal-Catalyzed Carboxylation of Organic Halides and Their Surrogates with Carbon Dioxide." Synthesis 50, no. 01 (September 13, 2017): 35–48. http://dx.doi.org/10.1055/s-0036-1590908.

Full text

Abstract:

Carbon dioxide is not only an essential component of ‘greenhouse gases’, but also an abundant, renewable C1 feedstock in organic synthesis. The catalytic incorporation of carbon dioxide into value-added chemicals to produce carboxylic acids has received enormous attention. This review summarizes recent developments in the transition-metal-catalyzed carboxylation of organic halides and their surrogates, such as aryl, vinyl, and alkyl halides and pseudohalides.1 Introduction2 Carboxylation of Aryl Halides and Pseudohalides3 Carboxylation of Vinyl Halides and Pseudohalides4 Carboxylation of Benzyl Halides and Pseudohalides5 Carboxylation of Allyl Halides and Pseudohalides6 Carboxylation of Propargyl Halides and Pseudohalides7 Carboxylation of Alkyl Halides and Pseudohalides8 Direct Carboxylation of C–H Bonds9 Conclusions and Perspectives

APA, Harvard, Vancouver, ISO, and other styles

15

Healy, PC, JD Kildea, BW Skelton, and AH White. "Lewis-Base Adducts of Group 11 Metal(I) Compounds. XLI. Conformational Systematics of [(N-base)1(CuX)1]∞ 'Skewed Stair' Polymers [N-base = (Substituted) Pyridine]." Australian Journal of Chemistry 42, no. 1 (1989): 93. http://dx.doi.org/10.1071/ch9890093.

Full text

Abstract:

In contrast to the symmetrical 'orthogonal' 'stair' polymers recorded in the previous paper, a variety of distorted ('skewed') stair polymer systems have been synthesized and structurally characterized by using substituted pyridine bases. The structure of CuBr/pyridine (1 : 1) is recorded, completing the series for pyridine with all halides (CI, Br, I), together with full halide arrays for the bases pyridine-2-carbaldehyde and 4-benzoylpyridine, in which substituent interactions with metal or halide are insufficient to destroy the basic polymer form but nevertheless may induce substantial distortions from the orthogonal ideal.

APA, Harvard, Vancouver, ISO, and other styles

16

Lou, Bo-Liang, Ying-Zhi Zhang, Guang-Zong Guo, and Li-Xin Dai. "Regioselective halide attack on 2,3-epoxyalcohols by complex metal halides." Acta Chimica Sinica 7, no. 6 (December 1989): 554–57. http://dx.doi.org/10.1002/cjoc.19890070612.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Ono, Aoi, Junko Kamimura, and Nobuko Suzuki. "Reductive Dehalogenation ofa-Haloketones by Sodium Halides or Pseudo-Halides and Metal Halides." Synthesis 1987, no. 04 (1987): 406–7. http://dx.doi.org/10.1055/s-1987-27965.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Slabbert, Cara, and Melanie Rademeyer. "Halide-bridged Polymers of d10Metals with Heterocyclic Type Donor Ligands." Acta Crystallographica Section A Foundations and Advances 70, a1 (August 5, 2014): C1025. http://dx.doi.org/10.1107/s2053273314089748.

Full text

Abstract:

Molecular self-assembly of organic ligands and inorganic metal halides leads to the formation of layered nano-composite organic-inorganic hybrid materials. The formation of both ionic- and coordination hybrids is possible. Both of these materials have attracted much attention recently in the field of Crystal Engineering [1], due to the retention and combination of desired inherent properties of both constitutional moieties, which then renders these materials multifunctional with a wide range of potential technological applications. Properties attributed to the organic component include structural diversity and optical properties [2], with mechanical hardness, electronic-, magnetic- and optical properties ascribed to the inorganic component. The coordination of an organic amine functionality to a metal halide results in the formation of halide-bridged polymers coordinated to donor ligands, with reported properties including non-linear optic (NLO) behavior, magnetic properties [3] and electronic semi-conduction. Literature confirms the technological importance of these materials and identifies the need for research aiming at a fundamental understanding of factors that control the observed structural trends and to relate chemical composition and topology of these compounds to ultimately enable retrosynthesis from desired property. In this study, a range of different divalent d10metal halides are combined with different aromatic nitrogen-containing organic ligands. The effects of change in metal atom, halide atom, stoichiometry and reaction conditions on the structural trends in the crystal systems are investigated. The molecular self-assembly of the said halide-bridged polymers is initiated by simple synthetic techniques under relatively mild conditions, at the most, hydrothermal reaction conditions. Structural characterisation was done employing single crystal X-ray diffraction, while bulk composition of the samples was investigated using powder X-ray diffraction.

APA, Harvard, Vancouver, ISO, and other styles

19

Li, Xiaoxiong, Jason Y. C. Lim, and Paul D. Beer. "Cationic all-halogen bonding rotaxanes for halide anion recognition." Faraday Discussions 203 (2017): 245–55. http://dx.doi.org/10.1039/c7fd00077d.

Full text

Abstract:

A family of cationic halogen bonding [2]rotaxanes have been synthesised via an active-metal template synthetic strategy. ¹H NMR spectroscopic anion titration investigations reveal these interlocked host systems recognize halides selectively over oxoanions in aqueous–organic solvent media. Furthermore, systematically modulating the rigidity and size of the rotaxanes’ anion binding cavities via metal complexation, as well as by varying the number of halogen bond-donor groups in the axle component, was found to dramatically influence halide anion selectivity.

APA, Harvard, Vancouver, ISO, and other styles

20

Siidra, Oleg I., and Mishel R. Markovski. "KCu(SeO4)Cl(H2O)2, a first copper chloride selenate." Zeitschrift für Kristallographie - Crystalline Materials 236, no. 5-7 (June 1, 2021): 173–78. http://dx.doi.org/10.1515/zkri-2021-2020.

Full text

Abstract:

Abstract A first copper chloride selenate was obtained upon attempted preparation of a selenate analog of chlorothionite. The new compound is monoclinic, P21/c, a = 7.1833(5) Å, b = 11.7784(8) Å, c = 8.2419(6) Å, β = 91.083(2)°, V = 697.20(8) Å3, R 1 = 0.033. KCu(SeO4)Cl(H2O)2 has no structural analogs and adds to the small family of transition metal selenate halides. The CuO3(H2O)2Cl strongly distorted octahedra share common O–O edges thus forming dimeric units with a Cu–Cu distance of 3.49 Å. Dimeric units and SeO4 tetrahedra in KCu(SeO4)Cl(H2O)2 share common O atoms to produce unique [Cu(SeO4)Cl(H2O)2]− chains. We discuss further perspectives of the selenate halide family and expected differences in crystal chemistry of sulfate and selenate halides.

APA, Harvard, Vancouver, ISO, and other styles

21

Kruk, Mikalai M., Aleksander S. Starukhin, Nugzar Zh Mamardashvili, Galina M. Mamardashvili, Yulia B. Ivanova, and Olga V. Maltseva. "Tetrapyrrolic compounds as hosts for binding of halides and alkali metal cations." Journal of Porphyrins and Phthalocyanines 13, no. 11 (November 2009): 1148–58. http://dx.doi.org/10.1142/s1088424609001492.

Full text

Abstract:

In this paper the binding of halides and alkali metal cations with porphyrin hosts is reported. The halide ions are complexed with diprotonated porphyrin macrocycle with high affinity and stable complexes of 1:1 and 1:2 structures with halide ions are formed. Strong (up to 300 times) quenching of the porphyrin fluorescence has been found upon the titration of porphyrin solutions with iodide ions. It was established that both static quenching upon formation of the non-fluorescent complex and dynamic diffusion-controlled quenching took place. It is shown that the halide ions binding isotherms can be linearized with double-logarithmic plots. The alkali metal cations are trapped with mono-meso-arylporphyrins containing a conformationally mobile complexing polyether fragment on the benzene ring with a terminal pyridine ring. The alkali metal cation binding constant depends on the polyether chain length. The five-membered (n = 5) polyether chain provides very high binding selectivity for potassium over lithium or sodium. The potassium complexation constants 3.6 × 105 and 7.2 × 104 M-1 have been obtained for Zn 2+ complex and diprotonated porphyrin, respectively. For signaling of the alkali cation complexation, it is proposed to use the binding between the terminal pyridine ring with either the Lewis acidic site (chelated Zn 2+ ion) or the diprotonated macrocycle core ( H 4 P 2+) acting as salt bridging site.

APA, Harvard, Vancouver, ISO, and other styles

22

Wu, Hsuan-Ta, Yu-Ting Cheng, Ching-Chich Leu, Shih-Hsiung Wu, and Chuan-Feng Shih. "Improving Two-Step Prepared CH3NH3PbI3 Perovskite Solar Cells by Co-Doping Potassium Halide and Water in PbI2 Layer." Nanomaterials 9, no. 5 (April 27, 2019): 666. http://dx.doi.org/10.3390/nano9050666.

Full text

Abstract:

Incorporating additives into organic halide perovskite solar cells is the typical approach to improve power conversion efficiency. In this paper, a methyl-ammonium lead iodide (CH3NH3PbI3, MAPbI3) organic perovskite film was fabricated using a two-step sequential process on top of the poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) hole-transporting layer. Experimentally, water and potassium halides (KCl, KBr, and KI) were incorporated into the PbI2 precursor solution. With only 2 vol% water, the cell efficiency was effectively improved. Without water, the addition of all of the three potassium halides unanimously degraded the performance of the solar cells, although the crystallinity was improved. Co-doping with KI and water showed a pronounced improvement in crystallinity and the elimination of carrier traps, yielding a power conversion efficiency (PCE) of 13.9%, which was approximately 60% higher than the pristine reference cell. The effect of metal halide and water co-doping in the PbI2 layer on the performance of organic perovskite solar cells was studied. Raman and Fourier transform infrared spectroscopies indicated that a PbI2-dimethylformamide-water related adduct was formed upon co-doping. Photoluminescence enhancement was observed due to the co-doping of KI and water, indicating the defect density was reduced. Finally, the co-doping process was recommended for developing high-performance organic halide perovskite solar cells.

APA, Harvard, Vancouver, ISO, and other styles

23

Koemets, Egor, Liang Yuan, Elena Bykova, Konstantin Glazyrin, Eiji Ohtani, and Leonid Dubrovinsky. "Interaction Between FeOOH and NaCl at Extreme Conditions: Synthesis of Novel Na2FeCl4OHx Compound." Minerals 10, no. 1 (January 5, 2020): 51. http://dx.doi.org/10.3390/min10010051.

Full text

Abstract:

Iron(III) oxide-hydroxide, FeOOH, is abundant in the banded iron formations (BIFs). Recent studies indicate that BIFs may carry water down to the lower mantle with subducting slabs. The previous experiments investigating the properties of FeOOH at extreme pressures (P) and temperatures (T) were performed in diamond anvil cells (DACs), where it was compressed inside alkali metal halide pressure-transmitting media (2). Alkali metal halides such as NaCl or KCl are expected to be chemically inert; therefore, they are widely used in DAC experiments. Here, we report the chemical interaction between FeOOH and NaCl pressure medium at 107(2) GPa and 2400(200) K. By means of single-crystal X-ray diffraction (SC-XRD) analysis applied to a multigrain sample, we demonstrate the formation of a Na2FeCl4OHx phase and provide its structural solution and refinement. Our results demonstrate that at high P-T conditions, the alkali metal halides could interact with hydrous phases and thus cannot be used as a pressure transmitting and thermal insulating medium in DAC experiments dedicated to studies of hydroxyl or water-bearing materials at high P-T.

APA, Harvard, Vancouver, ISO, and other styles

24

Grube, Karl, and Amos J. Leffler. "Synthesis of metal halides." Journal of Chemical Education 70, no. 8 (August 1993): A204. http://dx.doi.org/10.1021/ed070pa204.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Aji Suleiman, Abdulsalam, Xing Zhou, and Tianyou Zhai. "Two-dimensional metal halides." Journal of Physics D: Applied Physics 54, no. 1 (October 23, 2020): 013002. http://dx.doi.org/10.1088/1361-6463/abae35.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

MacDermott, TE. "Synthesis of Some Novel Dinuclear Metal Complexes, Containing Both Square-Planar and Tetrahedral Metal Ions, by the Reactions of Coordinated Diamines with an α-Hydroxy Ketone." Australian Journal of Chemistry 38, no. 9 (1985): 1319. http://dx.doi.org/10.1071/ch9851319.

Full text

Abstract:

Reactions between tris (propane-1,3-diamine)nickel(II) salts and 3- hydroxy-3-methylbutan-2-one in the presence of zinc(II) or cadmium(II) halides yield a series of di -oxygen-bridged dinuclear products which contain the square-planar nickel(II) complex of a 12-membered ligand ring one of whose members is either a zinc(II) or cadmium(II) halide. These complexes are thermally very stable but may be hydrolysed by water to give a complex of the corresponding α- imino alcohol.

APA, Harvard, Vancouver, ISO, and other styles

27

Reckeweg, Olaf, and Thomas Schleid. "No solid solution compounds in between the binaries: syntheses and crystal structures of Nb(Br0.62(4)Cl0.38(4))2Cl2 and NbI2Cl2." Zeitschrift für Naturforschung B 73, no. 1 (January 26, 2018): 29–34. http://dx.doi.org/10.1515/znb-2017-0188.

Full text

Abstract:

AbstractThe anion-mixed niobium tetrahalides Nb(Br0.62(4)Cl0.38(4))2Cl2 and NbI2Cl2 were obtained by heating NbBr5 with NbCl5 and NbI5 with NbCl5, respectively, in equimolar ratios with niobium metal in evacuated, torch-sealed silica ampoules at 720 K for 3 days. The orthorhombic title compounds form as very brittle black needles and were characterized by single-crystal X-ray diffraction [space group: Immm, Z=4; a=704.27(6), b=824.13(7), c=929.64(8) pm for Nb(Br0.62(4)Cl0.38(4))2Cl2 and a=753.76(6), b=829.38(7) and c=983.41(8) pm for NbI2Cl2]. Surprisingly enough, these mixed-anionic halides are not isostructural with either NbCl4, NbBr4 or NbI4, but crystallize isotypically with TaI2Cl2, thus being examples for differential site occupancy stabilized materials. Structural features of other niobium(IV) halides are compiled and compared to those of Nb(Br0.62(4)Cl0.38(4))2Cl2 and NbI2Cl2. Except for NbF4, they all exhibit chains of trans-edge connected [NbX6]2− octahedra, which allow Peierls distortions to form Nb–Nb single bonds. The packing of these chains differ, however, depending on the actual halide or mixed-halide combination.

APA, Harvard, Vancouver, ISO, and other styles

28

Kinsman, Luke M. M., Rosa A. M. Crevecoeur, Amrita Singh-Morgan, Bryne T. Ngwenya, Carole A. Morrison, and Jason B. Love. "Tantalum Recycling by Solvent Extraction: Chloride Is Better than Fluoride." Metals 10, no. 3 (March 6, 2020): 346. http://dx.doi.org/10.3390/met10030346.

Full text

Abstract:

The recycling of tantalum (Ta) is becoming increasingly important due to the criticality of its supply from a conflict mineral. It is used extensively in modern electronics, such as in capacitors, and so electronic waste is a potentially valuable secondary source of this metal. However, the recycling of Ta is difficult, not least because of the challenges of its leaching and subsequent separation from other metals. In this work, we show that Ta(V) halides, such as TaCl5 and TaF5, which can potentially be accessed from Ta metal upon acid halide leaching, can be recovered by solvent extraction using a simple primary amide reagent. The need for high halide concentrations in the aqueous phase implies the formation of the hexahalide salts [TaX6]− (X = F, Cl) and that an anion-swing mechanism operates. While extraction of the fluorides is poor (up to 45%), excellent extraction under chloride conditions is found (>99%) and presents an alternative route to Ta recycling.

APA, Harvard, Vancouver, ISO, and other styles

29

Li, Zongtao, Cunjiang Song, Longshi Rao, Hanguang Lu, Caiman Yan, Kai Cao, Xinrui Ding, Binhai Yu, and Yong Tang. "Synthesis of Highly Photoluminescent All-Inorganic CsPbX3 Nanocrystals via Interfacial Anion Exchange Reactions." Nanomaterials 9, no. 9 (September 11, 2019): 1296. http://dx.doi.org/10.3390/nano9091296.

Full text

Abstract:

All-inorganic cesium lead halide perovskite CsPbX3 (X = Cl, Br, I) nanocrystals (NCs) have attracted significant attention owing to their fascinating electronic and optical properties. However, researchers still face challenges to achieve highly stable and photoluminescent CsPbX3 NCs at room temperature by the direct-synthesis method. Herein, we synthesize CsPbX3 NCs by a facile and environmentally friendly method, which uses an aqueous solution of metal halides to react with Cs4PbBr6 NCs via interfacial anion exchange reactions and without applying any pretreatment. This method produces monodisperse and air-stable CsPbX3 NCs with tunable spectra covering the entire visible range, narrow photoluminescence emission bandwidth, and high photoluminescence quantum yield (PL QY, 80%). In addition, the chemical transformation mechanism between Cs4PbBr6 NCs and CsPbX3 NCs was investigated. The Cs4PbBr6 NCs were converted to CsPbBr3 NCs first by stripping CsBr, and then, the as-prepared CsPbBr3 NCs reacted with metal halides to form CsPbX3 NCs. This work takes advantage of the chemical transformation mechanism of Cs4PbBr6 NCs and provides an efficient and environmentally friendly way to synthesize CsPbX3 NCs.

APA, Harvard, Vancouver, ISO, and other styles

30

Era, Masanao, Yumeko Komatsu, and Naotaka Sakamoto. "Enhancement of Exciton Emission in Lead Halide-Based Layered Perovskites by Cation Mixing." Journal of Nanoscience and Nanotechnology 16, no. 4 (April 1, 2016): 3338–42. http://dx.doi.org/10.1166/jnn.2016.12295.

Full text

Abstract:

Spin-coated films of a lead halide, PbX: X = I and Br, layered perovskites having cyclohexenylethyl ammonium molecule as an organic layer, which were mixed with other metal halide-based layered perovskites consisting of various divalent metal halides (for example, CaI2, CdI2, FeI2, SnBr2 and so on), were prepared. The results of X-ray diffraction measurements exhibited that solid solution formation between PbX-based layered perovskite and other divalent metal halide-based layered perovskites was observed up to very high molar concentration of 50 molar% in the mixed film samples when divalent cations having ionic radius close to that of Pb2+ were employed. In the solid solution films, the exciton emission was much enhanced at room temperature. Exciton emission intensity of PbI-based layered perovskite mixed with CaI-based layered perovskite (20 molar%) is about 5 times large that of the pristine PbI-based layered perovskite, and that of PbBr-based layered perovskite mixed with SnBr-based layered perovskite (20 molar%) was also about 5 times large that of the pristine PbBr-based layered perovskite at room temperature.

APA, Harvard, Vancouver, ISO, and other styles

31

ONO, S., M. KOBAYASHI, and T. TOMOYOSE. "Covalency of noble metal halides." Solid State Ionics 176, no. 3-4 (January 31, 2005): 363–66. http://dx.doi.org/10.1016/j.ssi.2004.08.011.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Fedorov, V. E., A. V. Mishchenko, and Vladimir P. Fedin. "Cluster Transition Metal Chalcogenide Halides." Russian Chemical Reviews 54, no. 4 (April 30, 1985): 408–23. http://dx.doi.org/10.1070/rc1985v054n04abeh003064.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Hargittai, Magdolna. "Molecular Structure of Metal Halides." Chemical Reviews 100, no. 6 (June 2000): 2233–302. http://dx.doi.org/10.1021/cr970115u.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Martin, T. P., M. Heinebrodt, U. Näher, H. Göhlich, T. Lange, and H. Schaber. "FULLERENES DOPED WITH METAL HALIDES." International Journal of Modern Physics B 06, no. 23n24 (December 1992): 3871–77. http://dx.doi.org/10.1142/s021797929200195x.

Full text

Abstract:

The cage-like structure of fullerenes is a challenge to every experimentalist to put something inside—to dope the fullerenes. In fact, the research team that first identified C 60 as a football-like molecule quickly succeeded in trapping metal atoms inside and in shrinking the cage around this atom by photofragmentation. In this paper we report the results of “shrink-wrapping” the fullerenes around metal halide molecules. Of special interest is the critical size (the minimum number of carbon atoms) that can still enclose the dopant. A rough model for the space available inside a carbon cage gives good agreement with the measured shrinking limits.

APA, Harvard, Vancouver, ISO, and other styles

35

Böck, Barbara, Heinrich Nöth, and Ulrich Wietelmann. "Reactions of Amino-imino-boranes with Transition Metal Halides and Substituted Transition Metal Halides." Zeitschrift für Naturforschung B 56, no. 7 (July 1, 2001): 659–70. http://dx.doi.org/10.1515/znb-2001-0714.

Full text

Abstract:

The aminoiminoborane tmp-B=NCMe3 (1) adds to TiBr4 or ZrCl4 in a 1:1 ratio while PdCl2 adds 1 in a 1:2 ratio. In these new compounds the NBN unit is almost linear and the configuration corresponds to an allene. On the other hand 1 and Ti(OR)4 compounds and Ti(NMe2)4 give N metallated diaminoboranes tmp-B(X)-NCMe3EX3 (X = OR, NMe2). Mixed compounds Ti(OR)3-nXn lead to diaminoboranes with BOR groups while the TiCl bond inserts into the B = N bond of 1 to produce tmp-BNMe2-NCMe3TiCl3. Hydrolysis of this compound leads to a spirocyclic dititanoxane with a short linear Ti-O-Ti bond and pentacoordinated Ti centers carrying two Cl atoms each. Spirocycles with a BN2E (E = Ti, Nb, Ta, Pd) unit are formed when 1 is allowed to react with TiCl4, NbCl5, TaCl5 and PdCl2. The palladium compound 16 is dimeric, and dimerization occurs via Pd-Cl bridges. The aminoiminoborane tmp-B=NC6H3-2,6-iPr2 reacts with the titanium compounds in the same manner as 1, however without formation of spirocycles.

APA, Harvard, Vancouver, ISO, and other styles

36

Tan, Zhifang, Jincong Pang, Guangda Niu, Jun-Hui Yuan, Kan-Hao Xue, Xiangshui Miao, Weijian Tao, et al. "Tailoring the electron and hole dimensionality to achieve efficient and stable metal halide perovskite scintillators." Nanophotonics 10, no. 8 (June 1, 2020): 2249–56. http://dx.doi.org/10.1515/nanoph-2020-0624.

Full text

Abstract:

Abstract Metal halide perovskites have recently been reported as excellent scintillators for X-ray detection. However, perovskite based scintillators are susceptible to moisture and oxygen atmosphere, such as the water solubility of CsPbBr3, and oxidation vulnerability of Sn2+, Cu+. The traditional metal halide scintillators (NaI: Tl, LaBr3, etc.) are also severely restricted by their high hygroscopicity. Here we report a new kind of lead free perovskite with excellent water and radiation stability, Rb2Sn1-x Te x Cl6. The equivalent doping of Te could break the in-phase bonding interaction between neighboring octahedra in Rb2SnCl6, and thus decrease the electron and hole dimensionality. The optimized Te content of 5% resulted in high photoluminescence quantum yield of 92.4%, and low X-ray detection limit of 0.7 µGyair s−1. The photoluminescence and radioluminescence could be maintained without any loss when immersing in water or after 480,000 Gy radiations, outperforming previous perovskite and traditional metal halides scintillators.

APA, Harvard, Vancouver, ISO, and other styles

37

Swarnkar, Abhishek, Vikash Kumar Ravi, and Angshuman Nag. "Beyond Colloidal Cesium Lead Halide Perovskite Nanocrystals: Analogous Metal Halides and Doping." ACS Energy Letters 2, no. 5 (April 28, 2017): 1089–98. http://dx.doi.org/10.1021/acsenergylett.7b00191.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Sun, Ai-Huan, Qi Wei, Ai-Ping Fu, Song-De Han, Jin-Hua Li, and Guo-Ming Wang. "Syntheses, structures and efficient visible light-driven photocatalytic properties of layered cuprous halides based on two types of building units." Dalton Transactions 47, no. 20 (2018): 6965–72. http://dx.doi.org/10.1039/c7dt04733a.

Full text

Abstract:

The exploration of metal halides driven by in situ N-alkylation of TPT derivatives resulted in three layered cuprous halides, which show narrow band gaps and stable visible light-driven photocatalytic properties.

APA, Harvard, Vancouver, ISO, and other styles

39

Pickardt, Joachim, and Benedikt Staub. "Metallkomplexe mit 2,2'-Dipyridylamin als Liganden: Kristallstrukturen der Komplexe mit CdX2 (X = Cl, Br, I) und CuCN / Metal Complexes with 2,2'-Dipyridylamine as Ligand: Crystal Structures of the Complexes with CdX2 (X = Cl, Br, I) and CuCN." Zeitschrift für Naturforschung B 54, no. 3 (March 1, 1999): 329–36. http://dx.doi.org/10.1515/znb-1999-0306.

Full text

Abstract:

Reactions of 2,2′-dipyridylamine (dpyam) with cadmium halides yield crystals of [Cd(dpyam)(H2O )Cl2] (1), [Cd(dpyam)Br2] (2), and [Cd(dpyam)I2] (3). With CuCl2 and KCN a complex [Cu(dpyam )CN] · H2O (4) is obtained. Depending on the size of the halide ions the coordination changes from octahedral in 1 to trigonal bipyramidal in 2 and tetrahedral in 3. The coordination in 4 is trigonal. Due to the geometric strain imposed by the ligand all coordination polyhedra show significant distortions. 1 and 2 form dimers by halide bridges. With the exception of 3 all compounds form “supramolecular” structures via hydrogen bonds, e.g. chains or networks.

APA, Harvard, Vancouver, ISO, and other styles

40

Knott, Wilfried, Georg Georg Frommeyer, Astrid Klapdor, and Dagmar Windbiela. "Neue Synthesen mit Magnesiumhydrid. Teil 3: Herstellung nanokristalliner und amorpher Metalle durch Hydridreduktion / New Syntheses with Magnesium Hydride. Part 3: Preparation of Nanocrystalline or Amorphous Metals by Hydride Reduction." Zeitschrift für Naturforschung B 53, no. 4 (April 1, 1998): 459–68. http://dx.doi.org/10.1515/znb-1998-0412.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Yamamoto, Eiji, Satoshi Ukigai, and Hajime Ito. "Boryl substitution of functionalized aryl-, heteroaryl- and alkenyl halides with silylborane and an alkoxy base: expanded scope and mechanistic studies." Chemical Science 6, no. 5 (2015): 2943–51. http://dx.doi.org/10.1039/c5sc00384a.

Full text

Abstract:

A transition-metal-free method has been developed for the boryl substitution of functionalized aryl-, heteroaryl- and alkenyl halides using a silylborane/alkoxy-base reagent. Borylation of (Z)-alkenyl halides proceeded in a stereoretentive manner.

APA, Harvard, Vancouver, ISO, and other styles

42

Bai, Chunyan, Shujuan Han, Shilie Pan, Bingbing Zhang, Yun Yang, Lin Li, and Zhihua Yang. "Na3B4O7X (X = Cl, Br): two new borate halides with a 1D Na-X (X = Cl, Br) chain formed by the face-sharing XNa6octahedra." RSC Advances 5, no. 16 (2015): 12416–22. http://dx.doi.org/10.1039/c4ra16639f.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Ma, Yue-Yu, Ying-Rui Song, Wen-Jie Xu, Qian-Qian Zhong, Han-Qi Fu, Xue-Lei Liu, Cheng-Yang Yue, and Xiao-Wu Lei. "Solvent-free mechanochemical syntheses of microscale lead-free hybrid manganese halides as efficient green light phosphors." Journal of Materials Chemistry C 9, no. 31 (2021): 9952–61. http://dx.doi.org/10.1039/d1tc02330f.

Full text

Abstract:

Through mechanochemical syntheses, hybrid manganese halides were prepared displaying green emissions with highest PLQY of 79.5%. A relationship between structure and PLQY was established as a method to optimize the PLQY of hybrid metal halides.

APA, Harvard, Vancouver, ISO, and other styles

44

Mondal, Manoj, Saitanya K. Bharadwaj, and Utpal Bora. "O-Arylation with nitroarenes: metal-catalyzed and metal-free methodologies." New Journal of Chemistry 39, no. 1 (2015): 31–37. http://dx.doi.org/10.1039/c4nj01293c.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Popov, A. I., E. A. Kotomin, and J. Maier. "Analysis of self-trapped hole mobility in alkali halides and metal halides." Solid State Ionics 302 (April 2017): 3–6. http://dx.doi.org/10.1016/j.ssi.2016.12.004.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Weil, Konrad G. "Thermodynamics of Ag0-Solvation in Molten Silver Halides, Doped with Metal Halides." Zeitschrift für Naturforschung A 40, no. 2 (February 1, 1985): 131–36. http://dx.doi.org/10.1515/zna-1985-0205.

Full text

Abstract:

From the temperature dependence of the solubility of silver in its molten halides, the thermodynamic functions ΔHsolv and ΔSsolv are calculated. They depend strongly on the presence and concentration of mono- and divalent cations. A possible structure breaking effect of these ions is discussed.

APA, Harvard, Vancouver, ISO, and other styles

47

Ye, Shengqing, Tianyi Xiang, Xiaofang Li, and Jie Wu. "Metal-catalyzed radical-type transformation of unactivated alkyl halides with C–C bond formation under photoinduced conditions." Organic Chemistry Frontiers 6, no. 13 (2019): 2183–99. http://dx.doi.org/10.1039/c9qo00272c.

Full text

Abstract:

Recent advances in the metal-catalyzed radical-type transformation of unactivated alkyl halides with C–C bond formation under photoinduced conditions are summarized. Usually, a broad reaction scope is observed including tertiary, secondary, and primary alkyl halides, with good functional group compatibility.

APA, Harvard, Vancouver, ISO, and other styles

48

Obafemi, Craig A., and Choi Chuck Lee. "Lithium aluminium hydride reduction of some triarylvinyl bromides and acetates catalyzed by some transition metal chlorides." Canadian Journal of Chemistry 68, no. 11 (November 1, 1990): 1998–2000. http://dx.doi.org/10.1139/v90-306.

Full text

Abstract:

A number of triarylvinyl halides and acetates were reduced with lithium aluminium hydride using various transition metal chlorides as catalysts. The vinylic halides were reduced to the corresponding alkenes while the vinylic acetates were reduced to mixtures of triarylketones and alcohols. The reduction of labeled vinylic halides did not result in any scrambling of the label from C-2 to C-1. The reactions took place under mild conditions and relatively fast reaction times. Keywords: triarylvinyl chlorides, triarylvinyl acetates, lithium aluminium hydride reduction, 1,2,2-triarylethanol, 1,1,2-tri-p-tolyl[1-13C]ethane.

APA, Harvard, Vancouver, ISO, and other styles

49

Nishiura, Yoshiharu, Shingo Tsutsumi, Shiki Nakayama, and Kuniki Fukuda. "Some aspects of low color temperature metal halide lamps containing rare earth halides." JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN 77, Appendix (1993): 23. http://dx.doi.org/10.2150/jieij1980.77.appendix_23.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Yuan, Tao, Meifang Zheng, Markus Antonietti, and Xinchen Wang. "Ceramic boron carbonitrides for unlocking organic halides with visible light." Chemical Science 12, no. 18 (2021): 6323–32. http://dx.doi.org/10.1039/d1sc01028j.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!