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Journal articles on the topic 'FTIR; Quaternary ammonium salts; Separation'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

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1

Schmidtchen, F. P., and H. Oswald. "RP-HPLC Separation of Highly Charged Quaternary Ammonium Salts." Journal of Liquid Chromatography 9, no. 5 (1986): 993–1002. http://dx.doi.org/10.1080/01483918608076685.

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2

Okeke, Ugochukwu C., Chad R. Snyder, and Stanislav A. Frukhtbeyn. "Synthesis, Purification and Characterization of Polymerizable Multifunctional Quaternary Ammonium Compounds." Molecules 24, no. 8 (2019): 1464. http://dx.doi.org/10.3390/molecules24081464.

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Methacrylate analogs of quaternary ammonium salts functionalized with carboxylic (AMadh1 68.8% yield, AMadh2 53.2% yield) and methoxysilane (AMsil1 94.8% yield, AMsil2 36.0% yield) groups were synthesized via Menschutkin reaction. Fourier-transform infrared spectroscopy (FTIR), nuclear magnetic resonance spectroscopy (1H, 13C and 2D 1H-13C heteronuclear single quantum coherence (HSQC) NMR), mass spectrometry, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) were utilized to validate structures and characterize thermal properties of the novel multifunctional quaterna

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3

Liu, Qi, Mingqing Zhang, Yijun Cao, Biao Peng, and Joshua Bosco Barvor. "Zinc cyanide removal by precipitation with quaternary ammonium salts." Separation and Purification Technology 274 (November 2021): 119057. http://dx.doi.org/10.1016/j.seppur.2021.119057.

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4

Rodrigues, Otávia Martins Silva, Antônio Eduardo Clark Peres, Afonso Henriques Martins, and Carlos Alberto Pereira. "Kaolinite and hematite flotation separation using etheramine and ammonium quaternary salts." Minerals Engineering 40 (January 2013): 12–15. http://dx.doi.org/10.1016/j.mineng.2012.09.019.

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5

Ramadan, Y., Gy Pátzay, and G. T. Szabó. "Effect of quaternary ammonium salts on the separation efficiency of nanofiltration membranes." Desalination 256, no. 1-3 (2010): 54–57. http://dx.doi.org/10.1016/j.desal.2010.02.017.

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6

Araújo, Edcleide Maria, K. D. Araujo, and Taciana Regina de Gouveia Silva. "Physical Properties of Nylon 66/Organoclay Nanocomposites." Materials Science Forum 530-531 (November 2006): 702–8. http://dx.doi.org/10.4028/www.scientific.net/msf.530-531.702.

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Nanocomposites containing nylon 66 and montmorillonite clay organically modified with quaternary ammonium salts were obtained via direct melt intercalation. A montmorillonite sample from Boa Vista/PB, Northeast of Brazil, was treated with three types of quaternary ammonium salts such as Genamin, Praepagen and Cetremide. After the treatment, the powder was characterized by X-ray diffraction (XRD). The produced nanocomposites were characterized by Torque Rheometer, Infrared Spectroscopy (FTIR), mechanical properties and HDT. The obtained results for rheological characterization showed that the n

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7

Sheng, Jian Guo, and Ping Zeng. "Study on Organic Modified of Montmorillonite by Corrosion Inhibitor of Quaternary Ammonium Salts." Advanced Materials Research 669 (March 2013): 103–7. http://dx.doi.org/10.4028/www.scientific.net/amr.669.103.

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A series of organic montomorilonite were prepared by using Sodium monanorilonite(Na-MMT) as raw material and quaternary ammonium salts with different chain long as intercalation agents by the way of ion exchange method. Weightlessness experiment showed that intercalated agents could alleviate the corrosion of metal. The MMT and organic MMT (OMMT) were identified by infrared spectra (FTIR) and X-ray diffraction (XRD). The results showed that intercalation agents had intercalated into the interlayer space of MMT, and the spacing of MMT layers had increased from 1.51 nm to 2.94 nm.

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8

Medeiros, Keila Machado, Dayanne Diniz Souza, Taciana Regina de Gouveia Silva, Edcleide Maria Araújo, and Hélio Lucena Lira. "Polyamide66/National Bentonite Clay Nanocomposites Membranes for Water-Oil Separation." Materials Science Forum 727-728 (August 2012): 1807–11. http://dx.doi.org/10.4028/www.scientific.net/msf.727-728.1807.

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Membranes can be defined as polymer film that acts as a semipermeable barrier to filtration in a molecular scale, separating two phases. In this work, microporous membranes were obtained from hybrid organic/inorganic polyamide66 (PA66) and clay mineral from Paraíba State, treated with a quaternary ammonium salt in order to make it organophilic. The membranes in the form of thin films were prepared by immersion-precipitation technique from the nanocomposites obtained by solution, with a pre-determined reaction time of 2 h, with characteristics suitable to be used in microfiltration process for

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9

Crnčević, Doris, and Renata Odžak. "Synthesis of quaternary ammonium salts based on quinuclidin-3-ol and pyridine-4-aldoxime with alkyl chains." St open 1 (2020): 1–8. http://dx.doi.org/10.48188/so.1.8.

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Aim: In search of a new class of potential antimicrobial agents, novel ammonium salts based on quinuclidine-3-ol and pyridine-4-aldoxime with different lengths of alkyl chains were synthesized and analyzed. In addition to their potential biological application, newly synthesized salts containing terminal bromine could possibly be used for the synthesis of more potent bisquaternary salts. Methods: The commercially available quinuclidine-3-ol and pyridine-4-aldoxime were used for the synthesis of new derivatives with the appropriate alkyl chains. The purity of the synthesized salts was tested by

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10

Wu, Hua-Fang, Wen-Bin Lin, Li-Zi Xia, et al. "‘N-Stereogenic Quaternary Ammonium Salts’ from L-Amino Acids: Synthesis, Separation, and Absolute Configuration." Helvetica Chimica Acta 92, no. 4 (2009): 677–88. http://dx.doi.org/10.1002/hlca.200800326.

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11

El-Newehy, Mohamed H., Meera Moydeen A., Ali K. Aldalbahi, Badr M. Thamer, Yehia A. G. Mahmoud, and Hany El-Hamshary. "Biocidal Polymers: Synthesis, Characterization and Antimicrobial Activity of Bis-Quaternary Onium Salts of Poly(aspartate-co-succinimide)." Polymers 13, no. 1 (2020): 23. http://dx.doi.org/10.3390/polym13010023.

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Microbial multidrug resistance presents a real problem to human health. Therefore, water-soluble polymers based on poly(aspartate-co-succinimide) were synthesized via reaction of poly(aspartate-co-succinimide) with bis-quaternary ammonium or quaternary salts. The resultant copolymers were characterized by various techniques such as FTIR, TGA, 1HNMR, 13CNMR and elemental microanalysis. Antimicrobial activities of the new onium salts were investigated against Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, and Salmonella typhi, and the fungi; Candida albicans,Aspergillus niger,

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12

Parvulescu, Viorica, Adriana Popa, Gabriela Paun, Ramona Ene, Corneliu-Mircea Davidescu, and Gheorghe Ilia. "Effect of polymer support functionalization on enzyme immobilization and catalytic activity." Pure and Applied Chemistry 86, no. 11 (2014): 1793–803. http://dx.doi.org/10.1515/pac-2014-0715.

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Abstract Two enzymes, laccase and peroxidase, were immobilized on chloromethylated styrene-divinylbenzene copolymers supports functionalized with phosphonates ((RO)2PO) or mixed ammonium and phosphonium groups (N+R3Cl–, P+Ph3Cl–). Phosphonates groups and quaternary ammonium salts were grafted on the “gel-type” copolymer by Michaelis–Becker polymer analogue reaction. Mixed polymer-supported ammonium and phosphonium salts were obtained by transquaternization of the ammonium groups to phosphonium group. The degrees of functionalization for obtained polymers were relatively high ensuring a suffici

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13

Tang, Weiyang, Lingling Liu, Guizhen Li, Tao Zhu, and Kyung Ho Row. "Optimal separation of phenol from model oils by forming deep eutectic solvents with quaternary ammonium salts." Korean Journal of Chemical Engineering 34, no. 3 (2016): 814–21. http://dx.doi.org/10.1007/s11814-016-0316-y.

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14

Kawamura, Kunio, Akitsugu Okuwaki, T. V. Verheyen, and G. J. Perry. "Separation of Aromatic Carboxylic Acids Using Quaternary Ammonium Salts on Reversed‐Phase HPLC. 1. Separation Behavior of Aromatic Carboxylic Acids." Separation Science and Technology 41, no. 2 (2006): 379–90. http://dx.doi.org/10.1080/01496390500496900.

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15

Jiang, Hao, Guoyuan Xiang, Sultan Khoso, Jiahui Xie, Kai Huang, and Longhua Xu. "Comparative Studies of Quaternary Ammonium Salts on the Aggregation and Dispersion Behavior of Kaolinite and Quartz." Minerals 9, no. 8 (2019): 473. http://dx.doi.org/10.3390/min9080473.

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Fine particles in the presence of flotation reagents exhibit different dispersion and aggregation behaviors in a mineral suspension, and affect the flotation separation processes. In this study, the effects of three quaternary ammonium salts (i.e., dodecyltrimethylammonium chloride (DTAC), tetradecyltrimethylammonium chloride (TTAC), and hexadecyltrimethylammonium chloride (CTAC)) on the dispersion and aggregation behaviors of kaolinite and quartz were studied. The mechanism was systematically investigated using sedimentation tests, reagent adsorption analysis, zeta potential measurements, and

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16

Zawadowicz, M. A., S. R. Proud, S. S. Seppalainen, and D. J. Cziczo. "Hygroscopic and phase separation properties of ammonium sulfate/organics/water ternary solutions." Atmospheric Chemistry and Physics 15, no. 15 (2015): 8975–86. http://dx.doi.org/10.5194/acp-15-8975-2015.

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Abstract. Atmospheric aerosol particles are often partially or completely composed of inorganic salts, such as ammonium sulfate and sodium chloride, and therefore exhibit hygroscopic properties. Many inorganic salts have well-defined deliquescence and efflorescence points at which they take up and lose water, respectively. Field measurements have shown that atmospheric aerosols are not typically pure inorganic salt, instead, they often also contain organic species. There is ample evidence from laboratory studies that suggests that mixed particles exist in a phase-separated state, with an aqueo

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17

Zawadowicz, M. A., S. R. Proud, S. S. Seppalainen, and D. J. Cziczo. "Hygroscopic and phase separation properties of ammonium sulfate/organic/water ternary solutions." Atmospheric Chemistry and Physics Discussions 15, no. 5 (2015): 6537–66. http://dx.doi.org/10.5194/acpd-15-6537-2015.

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Abstract. Atmospheric aerosol particles are often partially or completely composed of inorganic salts, such as ammonium sulfate and sodium chloride, and therefore exhibit hygroscopic properties. Many inorganic salts have well-defined deliquescence and efflorescence points at which they take up and lose water, respectively. Deliquescence and efflorescence of simple inorganic salt particles have been investigated by a variety of methods, such as IR spectroscopy, tandem mobility analysis and electrodynamic balance. Field measurements have shown that atmospheric aerosols are not typically pure ino

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18

Etale, Anita, Dineo S. Nhlane, Alseno K. Mosai, et al. "Synthesis and application of cationised cellulose for removal of Cr(VI) from acid mine-drainage contaminated water." AAS Open Research 4 (January 21, 2021): 4. http://dx.doi.org/10.12688/aasopenres.13182.1.

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Background: Acid mine drainage (AMD) leads to contamination of surface and ground water by high levels of toxic metals including chromium. In many cases, these waters are sources of drinking water for communities, and treatment is therefore required before consumption to prevent negative health effects. Methods: Cationised hemp cellulose was prepared by etherification with two quaternary ammonium salts: 3-chloro-2-hydroxypropyl trimethyl ammonium chloride (CHPTAC) and glycidyltrimethylammonium chloride (GTMAC) and examined for (i) the efficiency of Cr(VI) removal under acid mine-drainage (AMD)

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19

Thomas, Trisha J., Karthik E. Ponnusamy, Nancy M. Chang, Kim Galmore, and Shelley D. Minteer. "Effects of annealing on mixture-cast membranes of Nafion® and quaternary ammonium bromide salts." Journal of Membrane Science 213, no. 1-2 (2003): 55–66. http://dx.doi.org/10.1016/s0376-7388(02)00512-4.

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20

Sugiura, Masaaki. "Effect of Quaternary Ammonium Salts on Carrier-Mediated Transport of Lanthanide Ions through Cellulose Triacetate Membranes." Separation Science and Technology 28, no. 7 (1993): 1453–63. http://dx.doi.org/10.1080/01496399308018050.

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21

Hou, Yucui, Jie Kong, Yuehong Ren, Shuhang Ren, and Weize Wu. "Mass transfer dynamics in the separation of phenol from model oil with quaternary ammonium salts via forming deep eutectic solvents." Separation and Purification Technology 174 (March 2017): 554–60. http://dx.doi.org/10.1016/j.seppur.2016.10.038.

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22

Bahrmann, Helmut, Michael Haubs, Thomas Müller, Norbert Schöpper, and Boy Comils. "Quaternary ammonium salts of phosphines as ligands and their recycling by membrane techniques or phase separation. Part I: monophasic systems." Journal of Organometallic Chemistry 545-546 (January 1997): 139–49. http://dx.doi.org/10.1016/s0022-328x(97)00170-8.

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23

Lin, Zengqi, Yucui Hou, Shuhang Ren, et al. "Phase equilibria of phenol + toluene + quaternary ammonium salts for the separation of phenols from oil with forming deep eutectic solvents." Fluid Phase Equilibria 429 (December 2016): 67–75. http://dx.doi.org/10.1016/j.fluid.2016.08.013.

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24

Valsecchi, R., M. Viganò, M. Levi, and S. Turri. "Structure, Wettability and Thermal Degradation of New Fluoro-Oligomer Modified Nanoclays." Journal of Nanoscience and Nanotechnology 8, no. 4 (2008): 1835–41. http://dx.doi.org/10.1166/jnn.2008.18248.

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Quaternary ammonium salts based on monofunctionalized Perfluoropolyether (PFPE) oligomers were synthesized and used for the cation exchange process of sodium Montmorillonite nanoclays. The new fluoromodified nanoclays were characterized through X-rays diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), termogravimetric analysis (TGA), differential scanning calorimetry (DSC), electronic microscopy (SEM-EDS), and contact angle measurements (CA). In particular XRD showed rather complex patterns (presence of higher order reflections) which allowed the calculation of basal spacings,

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25

Ichikawa, Ryoji, and Hideyuki Nakano. "Phase Separation of Mixed Films of Amorphous Molecular Materials with Quaternary Ammonium Salts: 4,4',4"-Tri(phenothiazinyl)triphenylamine-Tetrabutylammonium Tetrafluoroborate System." Journal of Photopolymer Science and Technology 26, no. 2 (2013): 255–56. http://dx.doi.org/10.2494/photopolymer.26.255.

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26

Kawamura, Kunio, Hideki Nagano, and Akitsugu Okuwaki. "Extraction of Benzene and Naphthalene Carboxylic Acids Using Quaternary Ammonium Salts As a Model Study for the Separation of Coal Oxidation Products." Separation Science and Technology 40, no. 13 (2005): 2761–71. http://dx.doi.org/10.1080/01496390500326503.

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27

Hou, Yucui, Zhi Feng, Jaime Ruben Sossa Cuellar, and Weize Wu. "Separation of phenols from oils using deep eutectic solvents and ionic liquids." Pure and Applied Chemistry 92, no. 10 (2020): 1717–31. http://dx.doi.org/10.1515/pac-2019-1119.

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AbstractPhenolic compounds are important basic materials for the organic chemical industry, such as pesticides, medicines and preservatives. Phenolic compounds can be obtained from biomass, coal and petroleum via pyrolysis and liquefaction, but they are mixtures in oil. The traditional methods to separate phenols from oil using alkaline washing are not environmentally benign. To solve the problems, deep eutectic solvents (DESs) and ionic liquids (ILs) have been developed to separate phenols from oil, which shows high efficiency and environmental friendliness. In this article, we summarized the

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28

Gomaa, Hossam Mohamed, Mohamed Mohamed EL-Rabiei, Hashem Nady, Elsayed Gamal Zaki, and Mohamed Attia Migahed. "1-(2-Aminoethyl)-1-dodecyl-2-undecyl-4,5-dihydro-1H-imidazol-1-ium chloride, 1-(2-Aminoethyl)-1-dodecyl-2-tridecyl-4,5-dihydro-1H-imidazol-1-ium chloride as Corrosion Inhibitors for Carbon Steel in Oil Wells Formation Water." Zeitschrift für Physikalische Chemie 233, no. 11 (2019): 1529–52. http://dx.doi.org/10.1515/zpch-2018-1207.

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Abstract Introducing1-(2-aminoethyl)-1-dodecyl-2-undecyl-4,5-dihydro-1H-imidazol-1-ium chloride (LQI), 1-(2-aminoethyl)-1-dodecyl-2-tridecyl-4,5-dihydro-1H-imidazol-1-ium chloride (MQI) as two organic structures quaternary ammonium salts, which have been made and analyzed by FTIR, 1H NMR spectroscopic methods. (X-65) carbon steel’s corrosion in naturally formed rocks’ oil wells formation water in the nonappearance (Blank) and using a wide range of concentrations (50, 100, 200, 300, 400, 500 ppm) of these cationic surfactants, as inhibition blockers using direct current (DC), alternative curren

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29

Wójcik-Bania, Monika, and Jakub Matusik. "The Effect of Surfactant-Modified Montmorillonite on the Cross-Linking Efficiency of Polysiloxanes." Materials 14, no. 10 (2021): 2623. http://dx.doi.org/10.3390/ma14102623.

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Polymer–clay mineral composites are an important class of materials with various applications in the industry. Despite interesting properties of polysiloxanes, such matrices were rarely used in combination with clay minerals. Thus, for the first time, a systematic study was designed to investigate the cross-linking efficiency of polysiloxane networks in the presence of 2 wt % of organo-montmorillonite. Montmorillonite (Mt) was intercalated with six quaternary ammonium salts of the cation structure [(CH3)2R’NR]+, where R = C12, C14, C16, and R’ = methyl or benzyl substituent. The intercalation

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30

Kawamura, Kunio, Akitsugu Okuwaki, T. V. Verheyen, and G. J. Perry. "Separation of Aromatic Carboxylic Acids Using Quaternary Ammonium Salts on Reversed‐Phase HPLC. 2. Application for the Analysis of Loy Yang Coal Oxidation Products." Separation Science and Technology 41, no. 4 (2006): 723–32. http://dx.doi.org/10.1080/01496390500527985.

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31

Du, Juan, Qiaochu Chen, Qingmao Liu, and Xuelan Hu. "Synthesis of a Novel Gemini Cationic Surfactant and Its Inhibition Behaviour and Mechanism Study on 2024 Al-Cu-Mg Alloy in Acid Solution." International Journal of Corrosion 2018 (2018): 1–12. http://dx.doi.org/10.1155/2018/9890504.

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Isopropylamine was taken as a raw material to synthesize a new multi-alkyl multiple quaternary-ammonium salts gemini surfactant bis[2-hydroxy-3-(dodecyldimethylammonio)propyl]-isopropylamine dichloride. The structure of the synthetic product was characterized by 1H NMR and FTIR. The surface activity was investigated; the inhibition efficiencies and inhibition mechanism of the synthetic product were studied by weight loss method, electrochemical method, microscopic morphology observation, and adsorption model calculation. The results indicate that cmc of synthetic product was 9.204 × 10-4 mol/L

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32

El Seoud, Omar A., Marc Kostag, Kerstin Jedvert, and Naved I. Malek. "Cellulose in Ionic Liquids and Alkaline Solutions: Advances in the Mechanisms of Biopolymer Dissolution and Regeneration." Polymers 11, no. 12 (2019): 1917. http://dx.doi.org/10.3390/polym11121917.

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This review is focused on assessment of solvents for cellulose dissolution and the mechanism of regeneration of the dissolved biopolymer. The solvents of interest are imidazole-based ionic liquids, quaternary ammonium electrolytes, salts of super-bases, and their binary mixtures with molecular solvents. We briefly discuss the mechanism of cellulose dissolution and address the strategies for assessing solvent efficiency, as inferred from its physico-chemical properties. In addition to the favorable effect of lower cellulose solution rheology, microscopic solvent/solution properties, including e

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33

Sgreccia, Emanuela, Maria Di Vona, Simonetta Antonaroli, et al. "Nanocomposite Anion Exchange Membranes with a Conductive Semi-Interpenetrating Silica Network." Membranes 11, no. 4 (2021): 260. http://dx.doi.org/10.3390/membranes11040260.

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Nanocomposite anion exchange membranes were synthesized based on poly(sulfone trimethylammonium) chloride. A hybrid semi-interpenetrating silica network containing a large amount of quaternary ammonium groups was prepared by two sol–gel routes, in situ with a single precursor, N-trimethoxysilylpropyl-N,N,N-trimethylammonium chloride (TMSP), or ex situ mixing two precursors, TMSP and 3-(2-aminoethylamino)propyldimethoxy-methylsilane (AEAPS). The properties of these hybrid composites and their degradation after immersion in 1 M KOH at 60 °C were studied. The degradation is reduced in the composi

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34

Deng, Chun Min, Tian Yi Zhong, and Bao Qi Zuo. "Surfactant-Induced Nanofibrous Architecture of Silk Fibroin Hydrogels." Materials Science Forum 745-746 (February 2013): 453–58. http://dx.doi.org/10.4028/www.scientific.net/msf.745-746.453.

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Hydrogels had been prepared by blending four types of surfactants such as alkyl betaine (zwitterion surfactant), tween 60 (non-ionic surfactant), sodium fatty alcohol ether sulfate (anionic surfactant) and silicone quaternary ammonium salt (cationic surfactant) with bombyx mori silk fibroin (SF) solution. Surfactant molecules would interact with SF molecules, resulting in lower critical micelle concentration (CMC). Gelation time measurements showed surfactants had significantly accelerated the hydrogelation process of SF solution, which could be controlled by the type or blend ratio of surfact

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35

SHAMIM, N., Z. PENG, L. HONG, K. HIDAJAT, and M. S. UDDIN. "SYNTHESIS AND CHARACTERIZATION OF DOUBLE SURFACTANT COATED MAGNETIC PARTICLES." International Journal of Nanoscience 04, no. 02 (2005): 187–95. http://dx.doi.org/10.1142/s0219581x05003061.

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The unique and novel physicochemical features of the nanosized magnetic particles, which are attained due to their size and shape morphology, have aggregated an interest in the fields of nanoscience and nanotechnology. In this work, magnetic particles coated with double-layer surfactants were prepared and characterized. The magnetic particles ( Fe3O4 ) were synthesized by chemical precipitation of Fe2+ and Fe 3+ salts (1:2 ratio) with ammonium hydroxide ( NH4OH ) under inert atmosphere at 80°C followed by resuspension of the nanoparticles in water using thiodiglycolic acid. This procedure prod

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36

Domenico, Philip, Dana L. Diedrich, and David C. Straus. "Extracellular polysaccharide production by Klebsiella pneumoniae and its relationship to virulence." Canadian Journal of Microbiology 31, no. 5 (1985): 472–78. http://dx.doi.org/10.1139/m85-088.

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Klebsiella pneumoniae serotype 1 and serotype 2 and their capsular variants were examined for production of cell-associated capsular polysaccharides and extracellular capsular polysaccharides. The virulence of these organisms in experimental animals was examined via intraperitoneal injection in mice and transtracheal inoculation into the lungs of rats. It was found that the production of either polysaccharide component correlated with the observed virulence. The extracellular polysaccharides were purified by ethanol precipitation, electrodialysis, extraction with quaternary ammonium salts, and

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37

Arlan, Adam Septiyono, Norman Subekti, Johny Wahyuadi Soedarsono, and Andi Rustandi. "Corrosion Inhibition by a Caesalpinia Sappan L Modified Imidazoline for Carbon Steel API 5L Grade X60 in HCl 1M Environment." Materials Science Forum 929 (August 2018): 158–70. http://dx.doi.org/10.4028/www.scientific.net/msf.929.158.

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Acidizing is one of the stimulation technologies in the oil and gas industry by removing scale, rust, debris or other acid-soluble particulates on the pipe tubing internal surface. The most common acid used is HCl. To avoid problems such as pipe or casing tubing leak due to acidic corrosion, during the acidizing normally applied with inhibition treatment by inorganic corrosion inhibitor with various compositions including quaternary ammonium salts, solvent and often some surfactant to strip oil from acid reactive surfaces. However, most of these compounds are not only expensive but also toxic

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38

Linehan, Keith, and Hugh Doyle. "Size Controlled Synthesis of Silicon Nanocrystals within Inverse Micelles." MRS Proceedings 1546 (2013). http://dx.doi.org/10.1557/opl.2013.621.

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ABSTRACTAlkyl-terminated Si nanocrystals (NCs) are synthesized at room temperature by hydride reduction of SiCl4 within inverse micelles. Highly monodisperse Si NCs (2 – 6 nm) are produced by variation of the cationic quaternary ammonium salts used to form the inverse micelles. Transmission electron microscopy imaging confirms the NCs are highly crystalline, while FTIR spectra confirm that the NCs are passivated by covalent attachment of alkanes, with minimal surface oxidation. The photoluminescence intensity of the Si NCs exhibits an inverse relationship with the mean NC diameter, with a quan

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39

Chu, Yen-Ho, Mou-Fu Cheng, and Yung-Hsin Chiang. "Combinatorial discovery of small-molecule 1,2,3-triazolium ionic liquids exhibiting lower critical solution temperature phase transition." Scientific Reports 10, no. 1 (2020). http://dx.doi.org/10.1038/s41598-020-75392-z.

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Abstract Both lower and upper critical solution temperature (LCST and UCST) systems are two typical phase behaviors of thermoresponsive materials with solvents, in which LCST is far less common than UCST. Recent studies on ionic liquids carrying LCST phase transitions have predominantly focused on quaternary ammonium- and phosphonium-based ionic salts. Based on the 1,2,3-triazole core structure assemblable by azide-alkyne cycloaddition click reaction, this work reports the combinatorial synthesis of 1,3,4-trialkylated 1,2,3-triazolium ionic liquids in three libraries with a total of 160 ionic

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