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Relevant bibliographies by topics / Ion-pair complex

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Academic literature on the topic 'Ion-pair complex'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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Journal articles on the topic "Ion-pair complex"

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Fang, Yao-Ren, and Kenneth Charles Westaway. "Isotope effects in nucleophilic substitution reactions. VIII. The effect of the form of the reacting nucleophile on the transition state structure of an SN2 reaction." Canadian Journal of Chemistry 69, no. 6 (1991): 1017–21. http://dx.doi.org/10.1139/v91-149.

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A spectroscopic investigation indicated that lithium thiophenoxide exists as a contact ion pair complex in dry diglyme whereas the other alkali metal thiophenoxides exist as a solvent-separated ion pair complex in diglyme. The addition of small amounts of water converts the lithium thiophenoxide contact ion pair complex into a solvent-separated ion pair complex. A smaller secondary α-deuterium kinetic isotope effect and a larger Hammett p value are observed when the nucleophile is the contact ion pair complex in the SN2 reaction between n-butyl chloride and thiophenoxide ion in diglyme. This i

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Hush, N. S. "Phenate ion and the Fe3+PhO− ion-pair complex." Recueil des Travaux Chimiques des Pays-Bas 75, no. 9 (2010): 1101–4. http://dx.doi.org/10.1002/recl.19560750915.

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Lai, Zhu-Gen, and Kenneth Charles Westaway. "Isotope effects in nucleophilic substitution reactions. VII. The effect of ion pairing on the substituent effects on SN2 transition state structure." Canadian Journal of Chemistry 67, no. 1 (1989): 21–26. http://dx.doi.org/10.1139/v89-004.

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The secondary α-deuterium kinetic isotope effects and substituent effect found in the SN2 reactions between a series of para-substituted sodium thiophenoxides and benzyldimethylphenylammonium ion are significantly larger when the reacting nucleophile is a free ion than when it is a solvent-separated ion pair complex. Tighter transition states are found when a poorer nucleophile is used in both the free ion and ion pair reactions. Also, the transition states for all but one substituent are tighter for the reactions with the solvent-separated ion pair complex than with the free ion. Hammett ρ va

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Singh, Raj Pal. "On the Existence of NaC2O4−Ion Pair Complex." Bulletin of the Chemical Society of Japan 62, no. 12 (1989): 4089–91. http://dx.doi.org/10.1246/bcsj.62.4089.

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M. Jamil, Dalia. "Characterization of a mixed-reagent ion-pair complex." International Journal of Research in Engineering and Innovation 07, no. 05 (2023): 210–14. http://dx.doi.org/10.36037/ijrei.2023.7504.

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A method has been proposed for the determination of drug containing amino group phenylephrine hydrochloride (PHP) in pharmaceutical dosage forms. The method is based on the ion pair reaction of this drug with reagent (egg yellow) in alkaline medium to give intense orange colored product (λmax at 470 nm of PHP) with molar absorptivity values of 1.67×105L.mol-1.cm-1 (r = 0.9995) and 5.60 ×105 L.mol-1.cm-1 (r = 0.9996), limit of detections of 0.0252 mg/L and 0.0236 mg/L and Limit of quantification of 0.0831 mg/L and 0.0708 mg/L respectively with concentration rang of (0.2-6.0) mg/L for drug. The

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Safa Majeed Hameed, Safa Majeed Hameed, Sahar Aqeel Hussain Sahar Aqeel Hussain, Mohammed Alaa Abdulzahra Mohammed Alaa Abdulzahra, and and Fawzi Yahya Wadday and Fawzi Yahya Wadday. "Separation and Spectroscopic Determination of Ge(IV) as an Ion Pair Association Complex Using DB18C6 Ligand." Journal of the chemical society of pakistan 46, no. 3 (2024): 281. http://dx.doi.org/10.52568/001465/jcsp/46.03.2024.

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A solvent extraction was applied using liquid ion exchange as a sensitive method to extract Germanium (IV) as anion complex K[GeO2(OH)2]- from basic media of KOH by used DB18C6 as a ligand dissolved in chloroform to form the ion pair association complex K-DB18C6+; K[GeO2(OH)2]-, the maximum wavelength of the extracted complex was λmax=290nm, and molar absorptive 1.269and#215;103 L/mol.cm. the Beerand#39;s –lambert law was adhered to within the specified range (1-20)ppm. The limits of detection and quantity were 0.034 and 0.102 ppm, respectively. The research studied optimal conditions of extra

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Kawther A. Sadeq. "Spectrophotometric Determination of Ciprofloxacin by Ion-pair complex Formation with Bromothymol Blue." journal of the college of basic education 17, no. 72 (2019): 93–100. http://dx.doi.org/10.35950/cbej.v17i72.4501.

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A new simple spectrophotometric method based on the formation of an ion –pair using bromothymol blue as ion –pair complexion reagent was developed for the determination of ciprofloxacin in pure form and tablets . Theion-pair formed was highly colored and easily extracted with chloroform at (pH3.0) and determined spectrophotometrically at 421 nm .The proposed method was successfully applied to determine (CPF) in its tablet formulation and the results are good , No interferences from an effective addition were noticed .

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A.Wannas, Fatimah, and Shawket K.Jawad. "Extraction and Determination of Nickel (Ii) Via Cloud Point Method." International Journal of Engineering & Technology 7, no. 4.36 (2018): 725. http://dx.doi.org/10.14419/ijet.v7i4.36.24231.

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Spectrophotometric study for ion pair complex of Ni(II) ion extracted into cloud point extraction larger appear wave length of maximum absorbance was λ=660 nm, for extracted Ni(II) ion as ion pair association ,used laboratory synthesized azo derivative 2-(4-hydroxy phenyl azo)-4-Benzen naphthol(HPAB).The study about Determination the optimum condition for extraction and determination was pH =10 in presence 100 µg Ni(II) in 10 ml aqueous solution ,0.6 mL of Triton x-114 and temperature of heating was 70 c° at heating time equal to 30 minute, stoichiometry shows the ion pair complex extracted wa

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Rajendraprasad, N., K. Basavaiah, and K. B. Vinay. "Sensitive Spectrophotometric Determination of Lamotrigine in Bulk Drug and Pharmaceutical Formulations using Bromocresol Green." Eclética Química Journal 35, no. 1 (2018): 55. http://dx.doi.org/10.26850/1678-4618eqj.v35.1.2010.p55-66.

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Two new, simple, rapid and reproducible spectrophotometric methods have been developed for the determination of lamotrigine (LMT) both in pure form and in its tablets. The first method (method A) is based on the formation of a colored ion-pair complex (1:1 drug/dye) of LMT with bromocresol green (BCG) at pH 5.02±0.01 and extraction of the complex into dichloromethane followed by the measurement of the yellow ion-pair complex at 410 nm. In the second (method B), the drug-dye ion-pair complex was dissolved in ethanolic potassium hydroxide and the resulting base form of the dye was measured at 62

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M., R. Keskar, and M. Jugade R. "A new spectrophotometric method for determination of amoxicillin using bromophenol blue." Education in Chemical Science and Technology Vol. 2, Aug 2022 (2022): 67–76. https://doi.org/10.5281/zenodo.6813279.

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Department of Chemistry, R. T. M. Nagpur University, University Campus, Amravati Road, Nagpur-440 033, Maharashtra, India E-mail : ravinj200l@yahoo.co.in Abstract : Simple and rapid spectrophotometric method has been developed for the determination of amoxicillin in bulk and pharmaceutical formulations. The method is based on formation of blue ion-pair complex between amoxicillin and bromophenol blue in dimethylsulphoxideacetonitrile medium with <em>λ</em>.<sub>max</sub> of 590 nm. Different conditions affecting the reaction have been studied and optimised. The composition of the comple

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Dissertations / Theses on the topic "Ion-pair complex"

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Donaldson, M. J. "Solid phase adsorption and ion-pair liquid chromatography of complex mixtures." Thesis, Lancaster University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293135.

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Saini, Abhishek. "Application of carboranes and metallacarboranes for synthesis of innovative nanostructures and for the development of highly stable ion-pair potentiometric sensors." Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/669355.

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En este trabajo se han descrito las aplicaciones de los carboranos y metalacarboranos para el desarrollo de complejos de pares iónicos y nanoestructuras. El anión metalacarborano [Co(C2B9H11)2]- se ha utilizado junto con antiobióticos del tipo [NR-R'H+] para formar complejos de pares de iones que, al incorporarse en la membrana polimérica de un electrodo selectivo de micro iones (ISE), pueden utilizarse para la detección potenciométrica del antibiótico utilizado en el complejo de pares de iones. El anión [Co(C2B9H11)2]- también se utilizó junto con el Polipirrol para formar una capa de polím

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Zanatta, Marciléia. "Efeitos de confinamento em líquidos iônicos hidratados." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/171732.

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Líquidos iônicos imidazólios (LIIs) associados a ânions com caráter básico foram sintetizados, caracterizados e seu comportamento estudado em solução. Inicialmente a troca isotópica H/D preferencial no grupo C2-CH3 de sais de 1-nbutil-2,3-dimetilimidazólio (BMMI) foi avaliada. Ficou evidente que o contato entre os pares de íons e a atuação do ânion como uma base neutra influenciaram fortemente a deuteração. Após a análise dos resultados de RMN, cálculos de DFT (Teoria do Funcional de Densidade) e Difração de Raios X, um complexo entre uma molécula de água e alguns LI foi sugerido, modificando

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Tungkananuruk, Nipon. "Extraction ion-pair complexes using solid-liquid systems." Thesis, Queen's University Belfast, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317121.

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Rudolph, Wolfram W., and Gert Irmer. "Hydration and ion pair formation in common aqueous La(III) salt solutions: a Raman scattering and DFT study." Royal Society of Chemistry, 2015. https://tud.qucosa.de/id/qucosa%3A36118.

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Raman spectra of aqueous lanthanum perchlorate, triflate (trifluorosulfonate), chloride and nitrate solutions were measured over a broad concentration (0.121–3.050 mol Lˉ¹) range at room temperature (23 °C). A very weak mode at 343 cmˉ¹ with a full width at half height at 49 cmˉ¹ in the isotropic spectrum suggests that the nona-aqua La(III) ion is thermodynamically stable in dilute perchlorate solutions (∼0.2 mol Lˉ¹) while in concentrated perchlorate solutions outer-sphere ion pairs and contact ion pairs are formed. The La³⁺ nona-hydrate was also detected in a 1.2 mol Lˉ¹ La(CF₃SO₃)₃(aq). In

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Poretskiy, Mikhail [Verfasser], and Karl-Heinz [Akademischer Betreuer] Gericke. "Ion-pair Imaging: Apparatus design and its application to a complete characterization of photodissociation processes / Mikhail Poretskiy ; Betreuer: Karl-Heinz Gericke." Braunschweig : Technische Universität Braunschweig, 2014. http://d-nb.info/1175820253/34.

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Ro, Youngju. "Molecular complexes for artificial photosynthesis." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS412/document.

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Le développement de sources d’énergie renouvelables telles que les combustibles solaires est une question cruciale dans le contexte actuel du réchauffement de la planète. L'eau est une source abondante, respectueuse de l'environnement, bon marché et abondante en électrons et en protons nécessaires à la production de combustible. Par conséquent, l'oxydation de l'eau activée par la lumière est une étape clé de la photosynthèse artificielle et le développement de catalyseurs efficaces, robustes et durables constitue un objectif important pour les chimistes. Dans la première partie de cette étude,

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Van, Wyk Pieter-Hugo. "Novel methods of chemical speciation of Pt(IV/II) complexes in acid halide-rich solutions by ion-pair RP-HPLC coupled to ICP-OES/MS in conjunction with 195Pt NMR." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/80099.

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Thesis (PhD)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: In this work a robust reversed phase ion-pairing high performance liquid chromatographic (RP-HPLC) method has been developed for the separation, characterization and quantification of all possible [PtCl6-nBrn]2- (n = 0 – 6) and [PtCl4-nBrn]2- (n = 0 – 4) complex anions using UV-Vis detection. High resolution 195Pt NMR of more concentrated PtII/IV solutions served to validate the relevant species assignments, particularly those of the stereoisomer species, cis- and trans- [PtCl4Br2]2-, [PtCl2Br4]2- and mer- and fac-[PtCl3Br3

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Morel-Desrosiers, Nicole. "Contribution a la thermodynamique des solutions de cryptates alcalins et alcalino-terreux dans l'eau et le methanol." Clermont-Ferrand 2, 1987. http://www.theses.fr/1987CLF2E374.

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Etude de la solvatation des especes resultant de l'inclusion d'un cation metallique dans la cavite d'un coordinat macrobicyclique, par la mesure des parametres thermodynamiques. Specificite des differents complexes du 222

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Cheng-HaoChen and 陳振豪. "Characterization of the Effects of Alkyl Chain Asymmetry on the Ion Pair Amphiphile Bilayer Structures and the Gelation Mechanism of Cyclodextrin/Peptide Amphiphiles Complex." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/xz932x.

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碩士<br>國立成功大學<br>化學工程學系<br>104<br>Ion pair amphiphile (IPA), a lipid-like complex composed of a pair of cationic and anionic surfactants, has been suggested as an inexpensive phospholipid substitute with great potentials in various pharmaceutical applications. In this work, we utilized molecular dynamics (MD) simulation to systematically explore the effects of various alkyl chain combinations of the alkyltrimethylammonium – alkylsulfate IPAs, i.e. CmTMA+ – CnS–, on the corresponding IPA bilayer structural and mechanical properties at the molecular level. Based on the intrinsic molecular structu

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Book chapters on the topic "Ion-pair complex"

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of ion-pair complex having tris(bipyridyl)nickel(II) cation complex and octacyanomolybdate anion complex." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 7. Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-65895-6_307.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of ion-pair complex of manganese Schiff-base complex cation and tetracyanonickalate anion." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 1. Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/978-3-662-62478-4_227.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of ion-pair complex of manganese Schiff-base complex cation and nitroprusside anion." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 1. Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/978-3-662-62478-4_226.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of copper(II) ion pair complex with phenylhydrazoacetylacetone isonicotinoyl hydrazone." In Magnetic Properties of Paramagnetic Compounds. Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54237-8_469.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of heterometallic ion-pair complex containing ethylenediamine copper(II) complex cation and hexacyanoferrate anion." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 4. Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/978-3-662-62474-6_304.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of ion-pair complex: nickel(II) complex cation with macrocyclic ligand and nickel(II) complex anion with maleonitriledithiolate." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 3. Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/978-3-662-62470-8_125.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of ion-pair complex: nickel(II) complex cation with macrocyclic ligand and cobalt(II) complex anion with maleonitriledithiolate." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 3. Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/978-3-662-62470-8_124.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of ion-pair complex: nickel(II) complex cation with cyclam ligand and cobalt(II) complex anion with maleonitriledithiolate." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 3. Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/978-3-662-62470-8_122.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of ion-pair complex containing substituted pentadecanecopper(II) cation and hexacyanoferrate anion." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 8. Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-66460-5_480.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of ion-pair complex containing nickel bis(maleonitriledithiolate) anion and radical cation." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 6. Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-662-65056-1_259.

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Conference papers on the topic "Ion-pair complex"

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Jarzeba, W., A. Hörmann, K. A. M. Thakur, and P. F. Barbara. "Ultrafast Dynamics of the Excited Br Atom - Mesitylene Eda Complex." In International Conference on Ultrafast Phenomena. Optica Publishing Group, 1994. http://dx.doi.org/10.1364/up.1994.thd.11.

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We recently made the first measurements of the electron transfer (et) kinetics of a bromide/aromatic cation contact ion pair (Br-/Ar+). This type of contact ion pair (CIP) is prepared by ultrafast optical excitation of the charge transfer band of a Br atom/aromatic molecule charge transfer complex.1

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Jassim, Baidaa Adnan, and Ali Ibraheem Khaleel. "Determination of atenolol in bulk and pharmaceutical normotic by derivative spectroscopy method for ion-pair complex." In 1ST SAMARRA INTERNATIONAL CONFERENCE FOR PURE AND APPLIED SCIENCES (SICPS2021): SICPS2021. AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0121893.

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Love, Nathan, Kenneth Leopold, and Anna Huff. "EVIDENCE FOR SPONTANEOUS PROTON TRANSFER IN THE COMPLEX FORMED FROM TRIFLIC ACID AND TRIMETHYLAMINE: MICROWAVE SPECTRUM AND COMPUTATIONAL ANALYSIS OF THE TRIMETHYLAMMONIUM TRIFLATE ION PAIR." In 2020 International Symposium on Molecular Spectroscopy. University of Illinois at Urbana-Champaign, 2020. http://dx.doi.org/10.15278/isms.2020.rl11.

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Love, Nathan, Kenneth Leopold, and Anna Huff. "EVIDENCE FOR SPONTANEOUS PROTON TRANSFER IN THE COMPLEX FORMED FROM TRIFLIC ACID AND TRIMETHYLAMINE: MICROWAVE SPECTRUM AND COMPUTATIONAL ANALYSIS OF THE TRIMETHYLAMMONIUM TRIFLATE ION PAIR." In 2021 International Symposium on Molecular Spectroscopy. University of Illinois at Urbana-Champaign, 2021. http://dx.doi.org/10.15278/isms.2021.wd02.

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Foroughi, P., S. Dessiatoun, A. Shooshtari, and M. M. Ohadi. "Experimental Characterization of an EHD Ion-Drag Micropump for Cryogenic Micro-Pumping Applications." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-42177.

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This paper presents a study on the characterization of a planar multi-stage electrohydrodynamic (EHD) ion-drag micropump for pumping of liquid nitrogen. Four designs of the pump — consisting of different emitter configurations (planar and saw-tooth), emitter-collector spacings (20 and 50 microns), and gaps between successive electrode pairs (80, 100 and 200 microns) — were tested at DC voltages ranging from 0 to 2.5 kV. The generated electric currents and static pressure heads were measured to characterize the pumping performance. After collecting and processing the data for the various design

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McFarlane, R. A. "RGB upconversion laser pumped by single IR pump." In OSA Annual Meeting. Optica Publishing Group, 1990. http://dx.doi.org/10.1364/oam.1990.fb4.

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Using a cw Ti3+:sapphire laser operating near 800 nm, to pump Er:YLiF4 and EnBaY2F8 laser crystals, we have obtained laser oscillation from upper levels 4I13/2,4I11/2, 4I9/2, 4S3/2, 2H9/2,4G11/2, and 2P3/2 of the Er3+ ion. We will summarize the observations to date, covering 0. 47-2.7 µm. Five of the upper laser levels are above the pumped level and therefore must require that cooperative energy sharing processes be occurring or involve a sequential absorption of two, three, or more pump photons, or both. To our knowledge, the laser at 470 nm is the first blue laser to be excited with a single

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Nagamura, T., H. Kawai, T. Ichihara, and H. Sakaguchi. "Photoinduced electron transfer and charge resonance band in ion-pair charge-transfer complexes of styrylpyridinium tetraphenylborate." In International Conference on Science and Technology of Synthetic Metals. IEEE, 1994. http://dx.doi.org/10.1109/stsm.1994.835503.

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Askar, Mohamed Mostafa, Mahmoud Abu El Ela, Ahmed H. El-Banbi, and Mohamed H. M. Sayyouh. "Predicting Scale Depositions of Barium and Strontium Sulfates Using Novel Artificial Neural Network Algorithms." In ADIPEC. SPE, 2024. http://dx.doi.org/10.2118/222123-ms.

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Abstract Numerous scale types normally deposit inside oil production wells; however, sulfate scales are probably the most alarming types due to their high strength and insolubility. Several company cases of slickline scratching and coiled tubing milling fail to clean and remove heavy depositions of barium and strontium sulfates. Observations of the current study show that these sulfate scales deposit due to cooling of super-saline formation waters inside offshore producers and pipelines, besides the mixing of incompatible waters. Prediction of sulfate scale deposition is challenging. Many of t

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Nagamura, Toshihiko, Hiroshi Sakaguchi, and Shigeki Muta. "Ultrafast photon-mode recording based on photoinduced electron transfer in ion-pair charge-transfer complexes of 4,4'-bipyridinium salts." In Optical Data Storage '95, edited by Gordon R. Knight, Hiroshi Ooki, and Yuan-Sheng Tyan. SPIE, 1995. http://dx.doi.org/10.1117/12.218740.

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Lee, Chin, та Timothy Zwier. "A MOLECULAR CAGE REPORTS ON ITS CONTENTS: THE INFRARED AND ULTRAVIOLET SPECTRA OF [2.2.2]BENZOCRYPTAND COMPLEXED WITH K+, Ba2+, AND THE ION PAIR Ba2+-ACETATEâˆ’". У 2023 International Symposium on Molecular Spectroscopy. University of Illinois at Urbana-Champaign, 2023. http://dx.doi.org/10.15278/isms.2023.7173.

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