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Journal articles on the topic 'Different organic precursors'

Author: Grafiati

Published: 11 December 2022

Last updated: 31 July 2025

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1

Li, Zelin, Bin Zhou, Tingting Zheng, et al. "Integrating Metabolomics and Proteomics Technologies Provides Insights into the Flavor Precursor Changes at Different Maturity Stages of Arabica Coffee Cherries." Foods 12, no. 7 (2023): 1432. http://dx.doi.org/10.3390/foods12071432.

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The metabolic modulation of major flavor precursors during coffee cherry ripening is critical for the characteristic coffee flavor formation. However, the formation mechanism of flavor precursors during coffee cherry ripening remains unknown. In the present study, a colorimeter was employed to distinguish different maturity stages of coffee cherry based on the coffee cherry skin colors, and proteomics and metabolomics profiles were integrated to comprehensively investigate the flavor precursor dynamics involved in Arabica coffee cherry ripening. The data obtained in the present study provide a

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Partridge, Andrew, Stewart Walker, and David Armitt. "Detection of Impurities in Organic Peroxide Explosives from Precursor Chemicals." Australian Journal of Chemistry 63, no. 1 (2010): 30. http://dx.doi.org/10.1071/ch09481.

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Previous analyses of organic peroxide explosives have focussed on identification of the explosive itself, and were performed using explosive samples synthesized from laboratory-grade precursors. In this work, analytical studies of precursors obtained from retail outlets identified compounds that could be carried over into the explosives as impurities during synthesis. Forensic and intelligence information may be gained by the identification of possible precursor impurities in explosive samples. This hypothesis was tested using triacetone triperoxide and hexamethylene triperoxide diamine prepar

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Gatou, Maria-Anna, Nefeli Lagopati, Ioanna-Aglaia Vagena, Maria Gazouli, and Evangelia A. Pavlatou. "ZnO Nanoparticles from Different Precursors and Their Photocatalytic Potential for Biomedical Use." Nanomaterials 13, no. 1 (2022): 122. http://dx.doi.org/10.3390/nano13010122.

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Semiconductor photocatalysts, particularly ZnO nanoparticles, were synthesized via the precipitation method using four different precursors (zinc acetate/zinc nitrate/zinc sulfate/zinc chloride) and compared, according to their optical, structural, photocatalytic, and anticancer properties. The materials were characterized via X-ray Diffraction method (XRD), micro-Raman, Fourier Transform Infrared Spectroscopy (FT-IR), Brunauer–Emmett–Teller (BET), Dynamic Light Scattering (DLS), and Field Emission Scanning Electron Microscope (FESEM) analysis. Photocatalysis was conducted under UV and visible

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Molnar, Jelena, Jasmina Agbaba, Bozo Dalmacija, Mile Klasnja, Malcolm Watson, and Marijana Kragulj. "The influence of different matrices on the nature and content of haloacetic acids precursors in ozonized water." Chemical Industry 66, no. 2 (2012): 253–61. http://dx.doi.org/10.2298/hemind110902080m.

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This paper investigates the influence of different matrices (groundwater a realistic natural matrix and commercial humic acid solution a synthetic matrix) on the nature and content of haloacetic acid (HAA) precursors in ozonized water (0.4 to 3.0 mg O3/mg DOC; pH 6). Natural organic matter (NOM) characterization of the natural matrix showed it was largely of hydrophobic character (65% fulvic and 14% humic acids), with the hydrophilic fractions HPIA and HPI-NA at 12% and 9%, respectively. At approximately the same dissolved organic carbon (DOC) content of the investigated matrices (~10 mg /L),

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Lannuque, Victor, Marie Camredon, Florian Couvidat, et al. "Exploration of the influence of environmental conditions on secondary organic aerosol formation and organic species properties using explicit simulations: development of the VBS-GECKO parameterization." Atmospheric Chemistry and Physics 18, no. 18 (2018): 13411–28. http://dx.doi.org/10.5194/acp-18-13411-2018.

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Abstract. Atmospheric chambers have been widely used to study secondary organic aerosol (SOA) properties and formation from various precursors under different controlled environmental conditions and to develop parameterization to represent SOA formation in chemical transport models (CTMs). Chamber experiments are however limited in number, performed under conditions that differ from the atmosphere and can be subject to potential artefacts from chamber walls. Here, the Generator for Explicit Chemistry and Kinetics of Organics in the Atmosphere (GECKO-A) modelling tool has been used in a box mod

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Chhabra, P. S., N. L. Ng, M. R. Canagaratna, et al. "Elemental composition and oxidation of chamber organic aerosol." Atmospheric Chemistry and Physics 11, no. 17 (2011): 8827–45. http://dx.doi.org/10.5194/acp-11-8827-2011.

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Abstract. Recently, graphical representations of aerosol mass spectrometer (AMS) spectra and elemental composition have been developed to explain the oxidative and aging processes of secondary organic aerosol (SOA). It has been shown previously that oxygenated organic aerosol (OOA) components from ambient and laboratory data fall within a triangular region in the f44 vs. f43 space, where f44 and f43 are the ratios of the organic signal at m/z 44 and 43 to the total organic signal in AMS spectra, respectively; we refer to this graphical representation as the "triangle plot." Alternatively, the

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Muriqi, Arbresha, and Michael Nolan. "First Principles Modelling of Growth of Hybrid Organic-Inorganic Films." ECS Meeting Abstracts MA2023-02, no. 5 (2023): 853. http://dx.doi.org/10.1149/ma2023-025853mtgabs.

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Hybrid organic-inorganic materials fabricated with molecular layer deposition (MLD) are a special class of materials that are attracting great interest in many economically and socially relevant technological applications due to their diphasic and tunable organic-inorganic structure. Despite the growing interest in these hybrid materials, knowledge around relevant precursor chemistries and reaction mechanisms, as well as details of many determined experimental results are unknown. Density functional theory (DFT) has proven to be a powerful tool to investigate and understand the atomic level de

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8

Pang, Qian, Guang Hu, Kun Jiao, et al. "Characteristics of organic pores and composition of bio-precursors in the Wufeng and Longmaxi Formation shales, Southern Sichuan Basin, China." Energy Exploration & Exploitation 36, no. 4 (2018): 645–64. http://dx.doi.org/10.1177/0144598717753166.

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Bio-precursors of organic matter, referring to formerly living precursors, can influence content and distribution of organic pores significantly. However, insufficient attention has been paid in previous studies. To research the impact of bio-precursors of organic matter on shale organic pores, we conducted palynology and thin section analysis, total organic carbon analysis, and N2 gas absorption experiments on the Wufeng and Longmaxi Formations shales and kerogen samples from the Shuanghe outcrop section in southern Sichuan Basin, China. Generally, there are three bio-precursor assemblages be

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9

Stefenelli, Giulia, Jianhui Jiang, Amelie Bertrand, et al. "Secondary organic aerosol formation from smoldering and flaming combustion of biomass: a box model parametrization based on volatility basis set." Atmospheric Chemistry and Physics 19, no. 17 (2019): 11461–84. http://dx.doi.org/10.5194/acp-19-11461-2019.

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Abstract. Residential wood combustion remains one of the most important sources of primary organic aerosols (POA) and secondary organic aerosol (SOA) precursors during winter. The overwhelming majority of these precursors have not been traditionally considered in regional models, and only recently were lignin pyrolysis products and polycyclic aromatics identified as the principal SOA precursors from flaming wood combustion. The SOA yields of these components in the complex matrix of biomass smoke remain unknown and may not be inferred from smog chamber data based on single-compound systems. He

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Chang, H. H., and G. S. Wang. "Correlations between surrogate nitrogenous organic precursors and C-, N-DBP formation." Water Science and Technology 64, no. 12 (2011): 2395–403. http://dx.doi.org/10.2166/wst.2011.823.

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Nitrosamines have been emerging as disinfection byproducts in drinking water using source water impacted with domestic wastewaters. Nitrogenous organic compounds are suggested as precursors of nitrosamines, but many of them have not been identified. This study investigated the correlations between nine selected nitrogenous organic compounds with different characteristics and corresponding disinfection by-product formation potentials (nitrosamines, trihalomethanes (THMs), and haloacetic acids (HAAs)) from their reactions with free chlorine, chlorine dioxide and monochloramine. Besides dimethyla

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Rodriguez, Cristian E., Audrey F. Adcock, Buta Singh, et al. "Divergence in Antiviral Activities of Carbon Dots versus Nano-Carbon/Organic Hybrids and Implications." C 9, no. 3 (2023): 79. http://dx.doi.org/10.3390/c9030079.

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Carbon dots (CDots) are generally defined as small carbon nanoparticles (CNPs) with effective surface passivation, for which the classical synthesis is the functionalization of pre-existing CNPs with organic molecules. However, “dot” samples produced by “one-pot” thermal carbonization of organic precursors are also popular in the literature. These carbonization-produced samples may contain nano-carbon domains embedded in organic matters from the precursors that survived the thermal processing, which may be considered and denoted as “nano-carbon/organic hybrids”. Recent experimental evidence in

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Zhang, Qiang, and Bin Liu. "Variation of Disinfection By-Products Formation Potential Species at Several Stages of Drinking Water Treatment Plants." Advanced Materials Research 777 (September 2013): 337–40. http://dx.doi.org/10.4028/www.scientific.net/amr.777.337.

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The variation of disinfection by-products (DBPs) at several stages of drinking water treatment plants was investigated in two drinking water plants. The results clearly indicate that the low molecular weight total organic carbon (TOC) which has been identified as primary precursor for chlorinated DBPs was difficult to remove by coagulation. Plant A which used conventional coagulation/sedimentation could not decrease the species of trihalomethanes (THMs) and haloacetic acids (HAAs) formation potential. Biological activated carbon (BAC) was applied in Plant B which removed the maximum amount of

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13

Harris, Jerry D., Emily A. Wade, Emmaline G. Ellison, et al. "Zinc–Acetate–Amine Complexes as Precursors to ZnO and the Effect of the Amine on Nanoparticle Morphology, Size, and Photocatalytic Activity." Catalysts 12, no. 10 (2022): 1099. http://dx.doi.org/10.3390/catal12101099.

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Zinc oxide is an environmentally friendly and readily synthesized semiconductor with many industrial applications. ZnO powders were prepared by alkali precipitation using different [Zn(acetate)2(amine)x] compounds to alter the particle size and aspect ratio. Slow precipitations from 95 °C solutions produced micron-scale particles with morphologies of hexagonal plates, rods, and needles, depending on the precursor used. Powders prepared at 65 °C with rapid precipitation yielded particles with minimal morphology differences, but particle size was dependent on the precursor used. The smallest par

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14

Mourdikoudis, Stefanos, and Luis M. Liz-Marzán. "Oleylamine in Nanoparticle Synthesis." Chemistry of materials : a publication of the American Chemical Society 25, no. 9 (2013): 1465–76. https://doi.org/10.1021/cm4000476.

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Wet chemistry in organic solvents has proven highly efficient for the preparation of several types of metallic, metal-oxide, and semiconductor nanostructures. This Short Review focuses on the use of oleylamine (OAm) as a versatile reagent for the synthesis of various nanoparticle systems. We describe the ability of OAm to act as a surfactant, solvent, and reducing agent, as a function of other synthesis parameters. We also discuss the specific role of OAm either alone or in combination with other reactants, to form nanostructures using a variety of organic or inorganic compounds as precursors.

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15

Aggett, Kieran, Thomas E. Davies, David J. Morgan, Dan Hewes, and Stuart H. Taylor. "The Influence of Precursor on the Preparation of CeO2 Catalysts for the Total Oxidation of the Volatile Organic Compound Propane." Catalysts 11, no. 12 (2021): 1461. http://dx.doi.org/10.3390/catal11121461.

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CeO2 catalysts were prepared by a precipitation method using either (NH4)2Ce(NO3)6 or Ce(NO3)3, as CeIV or CeIII precursors respectively. The influence of the different precursors on catalytic activity was evaluated for the total oxidation of propane with water present in the feed. The catalyst prepared using the CeIV precursor was more active for propane total oxidation. The choice of precursor influenced catalyst properties such as surface area, reducibility, morphology, and active oxygen species. The predominant factor associated with the catalytic activity was related to the formation of e

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16

Warneke, Jonas, Willem F. Van Dorp, Petra Rudolf, et al. "Acetone and the precursor ligand acetylacetone: distinctly different electron beam induced decomposition?" Physical Chemistry Chemical Physics 17, no. 2 (2015): 1204–16. http://dx.doi.org/10.1039/c4cp04239e.

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17

Gilbert, John C., Everett G. McKinley, and Duen-Ren Hou. "The Nature of Cyclopentyne from Different Precursors." Tetrahedron 53, no. 29 (1997): 9891–902. http://dx.doi.org/10.1016/s0040-4020(97)00334-7.

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18

Klęba, Joanna, Kun Zheng, Dorota Duraczyńska, Mateusz Marzec, Monika Fedyna, and Jakub Mokrzycki. "Insights into HKUST-1 Metal-Organic Framework’s Morphology and Physicochemical Properties Induced by Changing the Copper(II) Salt Precursors." Materials 18, no. 3 (2025): 676. https://doi.org/10.3390/ma18030676.

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The HKUST-1 metal-organic framework was synthesized using four different copper(II) salt precursors, namely copper nitrate, copper sulphate, copper acetate, and copper chloride, via the solvothermal method with no mixing. Syntheses were conducted without using the N,N-dimethylformamide to allow for a greener synthesis of MOFs. The selected physicochemical properties of the obtained metal-organic frameworks were determined. The yield of the obtained products changed in the order acetate>nitrate>sulfate, while no product was obtained in the synthesis with copper(II) chloride. The obtained

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19

Ma, Yi-Jia, Yu Xu, Ting Yang, et al. "The critical role of aqueous-phase processes in aromatic-derived nitrogen-containing organic aerosol formation in cities with different energy consumption patterns." Atmospheric Chemistry and Physics 25, no. 5 (2025): 2763–80. https://doi.org/10.5194/acp-25-2763-2025.

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Abstract. Nitrogen-containing organic compounds (NOCs) impact air quality and human health. Here, the abundance, potential precursors, and main formation mechanisms of NOCs in PM2.5 during winter were compared for the first time among Haerbin (dependent on coal for heating), Beijing (natural gas and coal as heating energy), and Hangzhou (no centralized heating policy). The total signal intensity of CHON+, CHN+, and CHON− compounds was highest in Haerbin and lowest in Hangzhou. Anthropogenic aromatics accounted for 73 %–93 % of all identified precursors of CHON+, CHN+, and CHON− compounds in Ha

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20

Kozień, Dawid, Piotr Jeleń, Joanna Stępień, Zbigniew Olejniczak, Maciej Sitarz, and Zbigniew Pędzich. "Surface Properties and Morphology of Boron Carbide Nanopowders Obtained by Lyophilization of Saccharide Precursors." Materials 14, no. 12 (2021): 3419. http://dx.doi.org/10.3390/ma14123419.

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The powders of boron carbide are usually synthesized by the carbothermal reduction of boron oxide. As an alternative to high-temperature reactions, the development of the carbothermal reduction of organic precursors to produce B4C is receiving considerable interest. The aim of this work was to compare two methods of preparing different saccharide precursors mixed with boric acid with a molar ratio of boron to carbon of 1:9 for the synthesis of B4C. In the first method, aqueous solutions of saccharides and boric acid were dried overnight at 90 °C and pyrolyzed at 850 °C for 1 h under argon flow

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21

Cruz, Alexander John, Giel Arnauts, Martin Obst, et al. "Effect of different oxide and hybrid precursors on MOF-CVD of ZIF-8 films." Dalton Transactions 50, no. 20 (2021): 6784–88. http://dx.doi.org/10.1039/d1dt00927c.

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22

Ham, Jiwoong, Minkyung Ko, Boyun Choi, Hyeong-U. Kim, and Nari Jeon. "Understanding Physicochemical Mechanisms of Sequential Infiltration Synthesis toward Rational Process Design for Uniform Incorporation of Metal Oxides." Sensors 22, no. 16 (2022): 6132. http://dx.doi.org/10.3390/s22166132.

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Sequential infiltration synthesis (SIS) is a novel technique for fabricating organic–inorganic hybrid materials and porous inorganic materials by leveraging the diffusion of gas-phase precursors into a polymer matrix and chemical reactions between the precursors to synthesize inorganic materials therein. This study aims to obtain a fundamental understanding of the physicochemical mechanisms behind SIS, from which the SIS processing conditions are rationally designed to obtain precise control over the distribution of metal oxides. Herein, in situ FTIR spectroscopy was correlated with various ex

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23

Gordon, T. D., A. A. Presto, N. T. Nguyen, et al. "Secondary organic aerosol production from diesel vehicle exhaust: impact of aftertreatment, fuel chemistry and driving cycle." Atmospheric Chemistry and Physics Discussions 13, no. 9 (2013): 24223–62. http://dx.doi.org/10.5194/acpd-13-24223-2013.

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Abstract. Environmental chamber ("smog chamber") experiments were conducted to investigate secondary organic aerosol (SOA) production from dilute emissions from two medium-duty diesel vehicles (MDDVs) and three heavy-duty diesel vehicles (HDDVs) under urban-like conditions. Some of the vehicles were equipped with emission control aftertreatment devices including diesel particulate filters (DPF), selective catalytic reduction (SCR) and diesel oxidation catalysts (DOC). Experiments were also performed with different fuels (100% biodiesel and low-, medium- or high-aromatic ultralow sulfur diesel)

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Gordon, T. D., A. A. Presto, N. T. Nguyen, et al. "Secondary organic aerosol production from diesel vehicle exhaust: impact of aftertreatment, fuel chemistry and driving cycle." Atmospheric Chemistry and Physics 14, no. 9 (2014): 4643–59. http://dx.doi.org/10.5194/acp-14-4643-2014.

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Abstract. Environmental chamber ("smog chamber") experiments were conducted to investigate secondary organic aerosol (SOA) production from dilute emissions from two medium-duty diesel vehicles (MDDVs) and three heavy-duty diesel vehicles (HDDVs) under urban-like conditions. Some of the vehicles were equipped with emission control aftertreatment devices, including diesel particulate filters (DPFs), selective catalytic reduction (SCR) and diesel oxidation catalysts (DOCs). Experiments were also performed with different fuels (100% biodiesel and low-, medium- or high-aromatic ultralow sulfur dies

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Peng, Zhe, Julia Lee-Taylor, Harald Stark, John J. Orlando, Bernard Aumont, and Jose L. Jimenez. "Evolution of OH reactivity in NO-free volatile organic compound photooxidation investigated by the fully explicit GECKO-A model." Atmospheric Chemistry and Physics 21, no. 19 (2021): 14649–69. http://dx.doi.org/10.5194/acp-21-14649-2021.

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Abstract. OH reactivity (OHR) is an important control on the oxidative capacity in the atmosphere but remains poorly constrained in many environments, such as remote, rural, and urban atmospheres, as well as laboratory experiment setups under low-NO conditions. For an improved understanding of OHR, its evolution during oxidation of volatile organic compounds (VOCs) is a major aspect requiring better quantification. We use the fully explicit Generator of Explicit Chemistry and Kinetics of Organics in the Atmosphere (GECKO-A) model to study the OHR evolution in the NO-free photooxidation of seve

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Zhang, Zhi-Fan, Richard A. Kennish, Blohowiak Kay A. Youngdahl, Martin L. Hoppe, and Richard M. Laine. "Superconducting fibers from organometallic precursors: Part III. Pyrolytic processing of precursor fibers." Journal of Materials Research 8, no. 8 (1993): 1777–90. http://dx.doi.org/10.1557/jmr.1993.1777.

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Sixty−70 μm diameter preceramic fibers, extruded from THF solutions containing 1:2:3 stoichiometric mixtures of yttrium, barium, and copper carboxylates, were pyrolytically transformed into ceramic fibers using controlled heating schedules and reactive atmospheres. The objectives of the work reported here were to identify appropriate processing conditions such that during pyrolysis the preceramic fibers would (1) eliminate the organic ligands without pore or void formation, (2) reach full density with a controlled grain size, and (3) form orthorhombic phase, 123 fibers with reasonable mechanic

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Abdelhamid, Muhammad E., Graeme A. Snook, Tamar L. Greaves, and Anthony P. O'Mullane. "Electropolymerisation of N-Ethylanilinium Trifluoroacetate Ionic Liquid into Poly(N-Ethylaniline) and Control of its Morphology." Australian Journal of Chemistry 70, no. 9 (2017): 985. http://dx.doi.org/10.1071/ch17258.

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In this paper, the electropolymerisation of pre-synthesised N-ethylanilinium trifluoroacetate, a protic ionic liquid (PIL), was carried out. The PIL served as the monomer precursor, solvent, and supporting electrolyte for the polymerisation process, and no additional acid was required due to the protic nature of the PIL. Two different morphologies of the poly(N-ethylaniline) were achieved by using different electropolymerisation approaches and the resultant films were soluble in the PIL precursor as well as a wide range of organic solvents. The use of anilinium based PILs, as polymerisation pr

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Saito, S., K. Hattori, and T. Okumura. "Outflows of Organic Halide Precursors from Forest Regions." Water Science and Technology 21, no. 12 (1989): 1877–80. http://dx.doi.org/10.2166/wst.1989.0192.

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Outflows of organic halide precursors (OXPs) from forest regions were studied in relation to water quality monitoring in the Yodo River basin. Firstly, the contribution of outflows from forest regions relative to the total was roughly estimated. Then equations for flows of these substances were formulated, divided into four different subflow categories: precipitation; throughfall; surface soil layer; and, deep soil layer. Finally, annual outflow loads were calculated for a test forest area.

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Bellal, Youcef, and Antar Bouhank. "CuO/SnO2 Nanocomposite Thin Films: Effect of Solvent and Precursor on Optical and Structural Properties." International Journal of Nanoscience 20, no. 03 (2021): 2150029. http://dx.doi.org/10.1142/s0219581x21500290.

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New materials nanocomposites were synthesized for the degradation of organic and inorganic pollutants. This study reviews CuO/SnO2 nanocomposite thin films for their photocatalytic effect. The latter were deposited using the spray pyrolysis method, which is a simple, cheapest and rapid technique. Different concentration ratios of precursors and solvent are used. The thin films were deposited on ordinary glass substrates heated to 550∘C from solutions of copper chloride and tin chloride as precursors. The optical and structural properties of nanocomposite thin films have been demonstrated, and

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Giedraityte, Z., L. S. Johansson, and M. Karppinen. "ALD/MLD fabrication of luminescent Eu-organic hybrid thin films using different aromatic carboxylic acid components with N and O donors." RSC Advances 6, no. 105 (2016): 103412–17. http://dx.doi.org/10.1039/c6ra24175a.

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Atomic/molecular layer deposition (ALD/MLD) processes based on Eu(thd)<sub>3</sub> and three different aromatic organic acids with O and N donors as precursors are systematically investigated for the growth of Eu-based inorganic–organic thin-film phosphors.

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Li, Ruijie, Siyuan Li, Xiaotong Jiang, Yangzhou Wu, and Kang Hu. "Organic Vapors from Residential Biomass Combustion: Emission Characteristics and Conversion to Secondary Organic Aerosols." Atmosphere 15, no. 6 (2024): 692. http://dx.doi.org/10.3390/atmos15060692.

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Residential biomass combustion emits a large amount of organic gases into ambient air, resulting in the formation of secondary organic aerosol (SOA) and various environmental and health impacts. In this study, we investigated the emission characteristics of non-methane organic compounds (NMOCs) from residential biomass fuels during vigorous combustion (flaming) and stable combustion (smoldering) conditions. We quantified NMOC emission factors based on the CO concentration for different combustion phases and found that NMOC emissions were higher during the smoldering phase and approximately two

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Muriqi, Arbresha, and Michael Nolan. "Role of titanium and organic precursors in molecular layer deposition of “titanicone” hybrid materials." Beilstein Journal of Nanotechnology 13 (November 2, 2022): 1240–55. http://dx.doi.org/10.3762/bjnano.13.103.

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The development of hybrid inorganic–organic films with well-controlled properties is important for many applications. Molecular layer deposition (MLD) allows the deposition of these hybrid films using sequential, self-limiting reactions, similar to atomic layer deposition (ALD). In this paper, we use first principles density functional theory (DFT) to investigate the growth mechanism of titanium-containing hybrid organic–inorganic MLD films, known as “titanicones”. We investigate in detail the chemistry between the most common Ti precursors, namely titanium tetrachloride (TiCl4) and tetrakis(d

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Vareda, João P., Artur J. M. Valente, and Luisa Durães. "Silica Aerogels/Xerogels Modified with Nitrogen-Containing Groups for Heavy Metal Adsorption." Molecules 25, no. 12 (2020): 2788. http://dx.doi.org/10.3390/molecules25122788.

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Heavy metals are common inorganic pollutants found in the environment that have to be removed from wastewaters and drinking waters. In this work, silica-derived aerogels and xerogels were modified via a co-precursor method to obtain functional adsorbents for metal cations. A total of six formulations based upon four different functional precursors were prepared. The materials′ structural characterization revealed a decreased porosity and surface area on modified samples, more prominent in xerogel counterparts. Preliminary tests were conducted, and the prepared samples were also compared to act

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Wu, Jing, Kang Jun Wang, Yi Li, and Ping Yu. "Semihydrogenation of Phenylacetylene Catalyzed by Palladium Nanoparticles Supported on Organic Group Modified Silica." Advanced Materials Research 233-235 (May 2011): 2109–12. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.2109.

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Different Pd precursors were used to prepare Pd catalysts supported by using organic group modified silica. The catalysts were characterized by TEM and FTIR analysis. The results indicated that the small Pd nanoparticles (1-2nm) were achieved using Pd precursors with negative charge, while the size of Pd particle increased to 2-4 nm using Pd precursors with positive charge. For semihydrogenation of phenylacetylene, large-sized Pd partcles (2-4nm) exhibited high styrene selectivity compared with small-sized ones (1-2nm).

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Liu, Yi, Xingyu Gao, Yongfeng Liu, Yuzhong Niu, Rongjun Qu, and Duolong Di. "Benign preparation of metal organic framework materials with different copper precursors and adsorption of organic dyes." Colloids and Surfaces A: Physicochemical and Engineering Aspects 710 (April 2025): 136302. https://doi.org/10.1016/j.colsurfa.2025.136302.

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dos Santos, Everton R. F., Romulo C. N. Leite, Aécio B. Sousa, Herve M. Laborde, and Meiry Glaucia F. Rodrigues. "Effects of Reduction of Percent of Template (HMI) and Time of Static Synthesis on the Structure of MCM-22 Zeolite." Materials Science Forum 805 (September 2014): 291–97. http://dx.doi.org/10.4028/www.scientific.net/msf.805.291.

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This work aims to study the effects of reducing the level of template HMI (100, 75, 50, 25 and 0% HMI) and time (10, 9 and 8 days) of static synthesis in the structure of MCM-22 zeolite. The synthesis of the MCM-22 (P) precursors was carried out by using hexamethyleneimine (HMI) as organic template under static conditions. The MCM-22 zeolites (100, 75 e 50% HMI) was obtained by the calcination of precursors MCM-22 (P) in a muffle to remove the occluded organic of precursors. These materials were characterized by X-ray diffraction (XRD), spectroscopy of X-ray for energy dispersive (EDX), adsorp

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Dettelbach, Kevan E., Danielle A. Salvatore, Adam Bottomley, and Curtis P. Berlinguette. "Tracking precursor degradation during the photo-induced formation of amorphous metal oxide films." Journal of Materials Chemistry A 6, no. 10 (2018): 4544–49. http://dx.doi.org/10.1039/c7ta10369g.

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Varutbangkul, V., F. J. Brechtel, R. Bahreini, et al. "Hygroscopicity of secondary organic aerosols formed by oxidation of cycloalkenes, monoterpenes, sesquiterpenes, and related compounds." Atmospheric Chemistry and Physics 6, no. 9 (2006): 2367–88. http://dx.doi.org/10.5194/acp-6-2367-2006.

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Abstract. A series of experiments has been conducted in the Caltech indoor smog chamber facility to investigate the water uptake properties of aerosol formed by oxidation of various organic precursors. Secondary organic aerosol (SOA) from simple and substituted cycloalkenes (C5-C8) is produced in dark ozonolysis experiments in a dry chamber (RH~5%). Biogenic SOA from monoterpenes, sesquiterpenes, and oxygenated terpenes is formed by photooxidation in a humid chamber (~50% RH). Using the hygroscopicity tandem differential mobility analyzer (HTDMA), we measure the diameter-based hygroscopic grow

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Morales-Torres, Sergio, Hana Jirglová, Luisa M. Pastrana-Martínez, and Francisco J. Maldonado-Hódar. "Influence of Electrostatic Interactions During the Resorcinol-Formaldehyde Polymerization on the Characteristics of Mo-Doped Carbon Gels." Processes 8, no. 6 (2020): 746. http://dx.doi.org/10.3390/pr8060746.

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The resorcinol (R)-formaldehyde (F) polymerization was carried out in different experimental conditions to obtain RF/Mo doped carbon xerogels with different morphology, porosity and nature and dispersion of metal. Attractive or repulsive electrostatic interactions were forced in the starting aqueous solution of RF-monomers using different synthesis conditions, namely, combinations of cationic or anionic surfactants, Mo-precursors and pH values. The results showed that when both cationic surfactant and Mo-precursor were used at neutral pH, attractive interactions with the anionic RF-macromolecu

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Hagen, D. J., L. Mai, A. Devi, J. Sainio, and M. Karppinen. "Atomic/molecular layer deposition of Cu–organic thin films." Dalton Transactions 47, no. 44 (2018): 15791–800. http://dx.doi.org/10.1039/c8dt03735c.

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The gas-phase atomic/molecular layer deposition (ALD/MLD) technique is strongly emerging as a viable approach for fabricating new exciting inorganic–organic hybrid thin-film materials. Here we report new ALD/MLD processes for copper-based hybrid materials based on five different organic precursors.

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Wang, Ping, Mohammed J. Meziani, Yingqiang Fu, et al. "Carbon dots versus nano-carbon/organic hybrids – dramatically different behaviors in fluorescence sensing of metal cations with structural and mechanistic implications." Nanoscale Advances 3, no. 8 (2021): 2316–24. http://dx.doi.org/10.1039/d1na00002k.

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Carbon dots of surface-functionalized small carbon nanoparticles are dramatically different from fluorescent samples from thermal carbonization of organic precursors in their fluorescence quenching-based sensing of copper cations in solution.

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Leppla, Denis, Nora Zannoni, Leslie Kremper, et al. "Varying chiral ratio of pinic acid enantiomers above the Amazon rainforest." Atmospheric Chemistry and Physics 23, no. 2 (2023): 809–20. http://dx.doi.org/10.5194/acp-23-809-2023.

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Abstract. Chiral chemodiversity plays a crucial role in biochemical processes such as insect and plant communication. However, the vast majority of organic aerosol studies do not distinguish between enantiomeric compounds in the particle phase. Here we report chirally specified measurements of secondary organic aerosol (SOA) at the Amazon Tall Tower Observatory (ATTO) at different altitudes during three measurement campaigns at different seasons. Analysis of filter samples by liquid chromatography coupled to mass spectrometry (LC-MS) has shown that the chiral ratio of pinic acid (C9H14O4) vari

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Achour, Samia, Fouad Chabbi, and Saâdia Guergazi. "Drinking Water Chlorination and Adverse Public Health Outcomes in Algeria." Advanced Materials Research 1030-1032 (September 2014): 501–8. http://dx.doi.org/10.4028/www.scientific.net/amr.1030-1032.501.

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Drinking water supplies continue to be a major source of human disease because many of them remain unsafe and vulnerable. The aim of this study was to investigate the levels of trihalomethanes formation and chemical and microbiological quality through four raw surface waters as well as finished tap waters. The seasonal changes on trihalomethane formation and concentration of organic precursors were examined. Results show that disinfection for Algerian drinking water reduces the risk of pathogenic infection but may pose chemical threat to human health due to high levels of by-products such as t

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Luska, Kylie L., and Audrey Moores. "Rational size control of gold nanoparticles employing an organometallic precursor [Au-C≡C- t-Bu]4 and tunable thiolate-functionalized ionic liquids in organic medium." Canadian Journal of Chemistry 90, no. 1 (2012): 145–52. http://dx.doi.org/10.1139/v11-146.

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Gold nanoparticles (Au NPs) stabilized with six different thiolate-functionalized ionic liquids (TFILs) were synthesized in an organic solvent. The size and optical properties of the TFIL-stabilized Au NPs can be rationally controlled by altering the N-alkyl chain length and (or) the counteranion of the TFIL-stabilizing ligand. Au NPs were prepared from the reduction of a gold precursor (HAuCl4 or [Au-C≡C-t-Bu]4) employing NaBH4 in the presence of the different disulfide precursors. A model, based on Israelachvili theory, is proposed to account for the dependence of NP size on the N-alkyl chai

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Söllner, J., J. Schmoranzer, J. Woitok, H. Hamadeh, and M. Heuken. "Low-Pressure Metal-Organic-Vapor-Phase-Epitaxy (MOVPE) of ZnSSe with Different Precursors." Materials Science Forum 182-184 (February 1995): 419–22. http://dx.doi.org/10.4028/www.scientific.net/msf.182-184.419.

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Bandosz, Teresa J. "Study of Nanocomposites Obtained by Carbonization of Different Organic Precursors within Taeniolite Matrices." Clays and Clay Minerals 44, no. 2 (1996): 237–43. http://dx.doi.org/10.1346/ccmn.1996.0440209.

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Chhabra, P. S., N. L. Ng, M. R. Canagaratna, et al. "Elemental composition and oxidation of chamber organic aerosol." Atmospheric Chemistry and Physics Discussions 11, no. 3 (2011): 10305–42. http://dx.doi.org/10.5194/acpd-11-10305-2011.

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Abstract. Recently, graphical representations of aerosol mass spectrometer (AMS) spectra and elemental composition have been developed to explain the oxidative and aging processes of secondary organic aerosol (SOA). It has been shown previously that oxygenated organic aerosol (OOA) components from ambient and laboratory data fall within a triangular region in the f44 vs. f43 space, where f44 and f43 are the ratios of the organic signal at m/z 44 and 43 to the total organic signal, respectively; we refer to this model as the "triangle plot." Alternatively, the Van Krevelen diagram has been used

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Triandafillidi, Ierasia, Christoforos G. Kokotos, Nikoleta Spiliopoulou, and Constantinos T. Constantinou. "Synthetic Approaches to Acyl Hydrazides and Their Use as Synthons in Organic Synthesis." Synthesis 52, no. 21 (2020): 3219–30. http://dx.doi.org/10.1055/s-0040-1707394.

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Acyl hydrazides constitute very important moieties in organic chemistry and have been employed as starting materials for different transformations to many classes of organic compounds. In this review, at first the approaches towards the synthesis of acyl hydrazides are presented. Furthermore, in the second part, the uses of this skeleton as an important intermediate for the synthesis of useful organic compounds are analyzed.1 Introduction2 Approaches towards the Synthesis of Acyl Hydrazides2.1 Synthesis of Acyl Hydrazides from Aldehydes2.2 Synthesis of Acyl Hydrazides from Carboxylic Acid Deri

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Okada, Kenji, Masanari Takano, Yasuaki Tokudome, Yomei Tokuda, and Masahide Takahashi. "Preparation of Silicophosphate Alternating Hybrid Copolymers via Nonaqueous Acid-Base Reactions of Phosphoric Acid and Organo-Bridged Bis(chlorosilane)." Molecules 25, no. 1 (2019): 127. http://dx.doi.org/10.3390/molecules25010127.

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A design of atomic and oligomer level structure in organic-inorganic hybrid materials is highly important for various applications. Nonaqueous acid-base reaction allows us to prepare silicophosphates with controlled inorganic networks (–(O–P–O–Si)n) at atomic level because phosphorous and silicon-based precursors can react directly, resulting in an alternating copolymer network. Organic functionalization in those materials has been realized so far by using organic-modified phosphorous acid and/or organo-chlorosilane as precursors. In the present study, silicophosphate oligomers exhibiting inor

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Lee-Taylor, J., A. Hodzic, S. Madronich, B. Aumont, M. Camredon, and R. Valorso. "Multiday production of condensing organic aerosol mass in urban and forest outflow." Atmospheric Chemistry and Physics 15, no. 2 (2015): 595–615. http://dx.doi.org/10.5194/acp-15-595-2015.

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Abstract. Secondary organic aerosol (SOA) production in air masses containing either anthropogenic or biogenic (terpene-dominated) emissions is investigated using the explicit gas-phase chemical mechanism generator GECKO-A. Simulations show several-fold increases in SOA mass continuing for multiple days in the urban outflow, even as the initial air parcel is diluted into the regional atmosphere. The SOA mass increase in the forest outflow is more modest (~50%) and of shorter duration (1–2 days). The multiday production in the urban outflow stems from continuing oxidation of gas-phase precursor

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