Academic literature on the topic 'Quaternary ammonium bromide (QBr)'
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Journal articles on the topic "Quaternary ammonium bromide (QBr)"
Kim, Hyeonjeong, Dayoung Jung, Jiseon Hwang, Junghyun Chae, and Jinho Chang. "Probing the speciation of quaternary ammonium polybromides by voltammetric tribromide titration." Analyst 143, no. 17 (2018): 4017–21. http://dx.doi.org/10.1039/c8an00560e.
Full textDavey, Tim W., William A. Ducker, Alan R. Hayman, and Jim Simpson. "Krafft Temperature Depression in Quaternary Ammonium Bromide Surfactants." Langmuir 14, no. 12 (June 1998): 3210–13. http://dx.doi.org/10.1021/la9711894.
Full textStefańska, Justyna, Anna Pietruczuk-Padzik, Marta Struga, Maciej Borkowski, and Stefan Tyski. "Biological Evaluation of Quaternary bis Ammonium Salt and Cetylpyridinum Bromide Against S. epidermidis biofilm." Polish Journal of Microbiology 62, no. 4 (2013): 359–64. http://dx.doi.org/10.33073/pjm-2013-049.
Full textYoshimura, Tomokazu, Hiroaki Yoshida, Akiko Ohno, and Kunio Esumi. "Physicochemical properties of quaternary ammonium bromide-type trimeric surfactants." Journal of Colloid and Interface Science 267, no. 1 (November 2003): 167–72. http://dx.doi.org/10.1016/s0021-9797(03)00694-5.
Full textBetz, Richard, and Peter Klüfers. "N-(2-Iodophenylmethyl)hexamethylenetetraminium bromide dihydrate." Acta Crystallographica Section E Structure Reports Online 63, no. 11 (October 10, 2007): o4279. http://dx.doi.org/10.1107/s1600536807048623.
Full textVega, Daniel, and Ricardo Baggio. "A new polymorphic form of Otilonium Bromide." Acta Crystallographica Section A Foundations and Advances 70, a1 (August 5, 2014): C1576. http://dx.doi.org/10.1107/s205327331408423x.
Full textKulič, Jiří, Jiří Sussenbek, and Aleš Ptáček. "Alkaline Hydrolysis of Substituted Phenyl Acetates Catalyzed by Quaternary Ammonium Salts." Collection of Czechoslovak Chemical Communications 58, no. 12 (1993): 2891–95. http://dx.doi.org/10.1135/cccc19932891.
Full textMikláš, R., N. Miklášová, M. Bukovský, and F. Devínsky. "Synthesis and antimicrobial properties of binaphthyl derived quaternary ammonium bromides." Acta Facultatis Pharmaceuticae Universitatis Comenianae 59, no. 1 (January 1, 2012): 39–47. http://dx.doi.org/10.2478/v10219-012-0017-5.
Full textMatsuoka, Keisuke, Naohiro Takahashi, Shiho Yada, and Tomokazu Yoshimura. "Solubilization ability of star-shaped trimeric quaternary ammonium bromide surfactant." Journal of Molecular Liquids 291 (October 2019): 111254. http://dx.doi.org/10.1016/j.molliq.2019.111254.
Full textSun, Hong Juan, Tong Jiang Peng, Hai Feng Liu, and Jin Mei Sun. "XRD Study of Hydrophlogopite Intercalated with Alkyl Quaternary Ammonium Salt." Advanced Materials Research 178 (December 2010): 330–35. http://dx.doi.org/10.4028/www.scientific.net/amr.178.330.
Full textDissertations / Theses on the topic "Quaternary ammonium bromide (QBr)"
Poon, Grace Chemical Sciences & Engineering Faculty of Engineering UNSW. "Bromine complexing agents for use in vanadium bromide (V/Br) redox flow cell." Publisher:University of New South Wales. Chemical Sciences & Engineering, 2008. http://handle.unsw.edu.au/1959.4/41210.
Full textChen, Xiaocheng. "Synthesis of 10-Carboxy-N-Decyol-N, N’- Dimethyldecyl-1-Ammonium Bromide as Organogelator & Room temperature Shape Memory Programming of Stearic Acid/ Natural Rubber Bilayer Blend." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1500563824207268.
Full textCom, Dominique. "Contribution à l'étude de la réaction de polycondensation phénol-epoxy par catalyse par transfert de phase." Paris 6, 1986. http://www.theses.fr/1986PA066031.
Full textWan-ChiLin and 林婉琦. "Quaternary ammonium bromide salts with mono-, tri-, and tetra- n-octyl chains in polymer light-emitting diodes." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/32138317069240205499.
Full text王鵬為. "The Formation of a Third Liquid Phase and the Phase Transfer Catalytic Reaction between N-Butyl Bromide and Sodium Phenolate Using Symmetric Quaternary Ammonium Salts as the Catalysts." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/81476356522687945365.
Full text國立成功大學
化學工程研究所
85
This study amied at the formation of a third liquid phase and the reaction kinetics in the third liquid phase formed in the systems of toluene/R4NBr/(NaOPh+NaOH) aqueous solution. By a series of experiments, we have found that all symmetric quaternary ammonium bromides, except for Et4NBr, can form a third liquid phase. These symmetric quaternary ammonium salts can be classified into two types, hydrophilic and hydrophobic (lipophilic). In the system containing a hydrophihc salt, the third liquid phase was formed by salting-out effect with adding NaOH. Note that reverse extraction was observed in the system containing Bu4NBr. Referring to the result obtained by Angrawals et al., we know that this phenomenon is attributed to the formation of QOPh.(HOPh)n complex, in which phenol is formed by he hydrolysis of NaOPh. The formation this complex can enhance the solubility of QOPh in toluene. The formation of a third liquid phase in the system containing a hydrophobic salt is due to the formation of an ionic complex in toluene as explained in the following. From the IR spectrum, we know that the base complex in the toluene phase contains NaOPh, not NaOH. When an excess amount of base was found in toluene, more water was measured in the same phase. These two observations suggest the formation of QOPh.(H2O)n.(NaOPh)m complex in toluene. Futhermore, Na23 NMR spectrum shows that Na in this complex is of two types, ionic and nonionic (covalent). This fact implies that this complex might have ionic property which induce the formation of a third liquid phase. Temperature affects the formation of a third liquid phase in two different ways, depending the kind of quaternary ammonium salt. Low temperature is beneficial the formation of a third phase for a system containing a hydrophobic salts, whereas high temperature is advantageous that containing a hydrophilic one. From the observation on the composition of a third liquid phase, we consider that the SN2 reaction in the third liquid phase is not by quaternary ammonium ion pair, instead, is by the free anion. Therefore, we adopt a micelle-like mechanism to delineate the reaction in the third hquid phase. The reaction rate expression that derived is of a zero order form. Experiment result confirmed this kinetic model.