Synthesis and Characterizaion of Adamantane-Containing Quaternary Ammonium Salts

2011 ◽  
Vol 233-235 ◽  
pp. 238-241 ◽  
Author(s):  
Jian Wei Guo ◽  
Nian Yun Guan ◽  
Sa Liu ◽  
Chu Fen Yang ◽  
Le Jie Zhu
Keyword(s):  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Alkylating Agents ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Adamantane Derivatives ◽  
H Nmr ◽  
Potential Use

To develop the potential use of adamantane derivatives in surfactant field, the adamantyl residue was introduced into the quaternary ammonium salt. The method involved synthesizing N-(1-adamantyl)-N, N-dimethylamine from 1-adamantine and quaternizing with different alkylating agents. Eight adamantane-containing quaternary ammonium salts were prepared and their structures were identified by1H NMR and IR.

Preparation and Characterization of Two New Kinds of Soluble Quaternary Ammonium Salts of Chitosan

2011 ◽  
Vol 239-242 ◽  
pp. 496-500
Author(s):  
Li Ju Tan ◽  
He Dong Wang ◽  
Jiang Tao Wang
Keyword(s):  
Schiff Base ◽  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Resonance Spectroscopy ◽  
Spectra Analysis ◽  
Chitosan Derivatives ◽  
H Nmr

Schiff base of chitosan was obtained by the reaction of chitosan and aromatic aldehyde, and then Schiff base of chitosan reacted with methyl iodide to get soluble quaternary ammonium salts of chitosan which were N-metoxybenzenemethyl quaternary ammonium salt of chitosan (NM- Chitosan) and N-hydroxybenzenemethyl quaternary ammonium salt of chitosan(NH-Chitosan). The obtained chitosan derivatives were characterized by Infrared Spectra Analysis(FT-IR), Nuclear Magnetic Resonance Spectroscopy(1H NMR) and elemental analysis. Quantitative analysis showed that there was small difference between degrees of quaternization(DQ) and degrees of substitution(DS), and the solubility of chitosan derivatives was demonstrated to be better in the organic solvents.

scholarly journals Design of chiral urea-quaternary ammonium salt hybrid catalysts for asymmetric reactions of glycine Schiff bases

RSC Advances ◽  
2015 ◽  
Vol 5 (96) ◽  
pp. 78941-78949 ◽  
Author(s):  
Maximilian Tiffner ◽  
Johanna Novacek ◽  
Alfonso Busillo ◽  
Katharina Gratzer ◽  
Antonio Massa ◽  
...  
Keyword(s):  
Schiff Bases ◽  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Quaternary Ammonium Salts ◽  
Asymmetric Reactions ◽  
Ammonium Salts ◽  
Hybrid Catalysts

Bifunctional chiral urea-containing quaternary ammonium salts can be straightforwardly synthesised and systematically fine-tuned for asymmetric reactions of glycine Schiff bases.

Preparation of modified montmorillonite with different quaternary ammonium salts and application in Pickering emulsion

2019 ◽  
Vol 43 (29) ◽  
pp. 11543-11548 ◽  
Author(s):  
Zeyu Yang ◽  
Wanxu Wang ◽  
Xiumei Tai ◽  
Guoyong Wang
Keyword(s):  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Pickering Emulsion ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Modified Montmorillonite ◽  
Long Chain

The emulsion stabilized with long-chain quaternary ammonium salt-modified montmorillonite has better stability.

Synthesis, characterization and antimicrobial activities of water-soluble amphiphilic copolymers containing ciprofloxacin and quaternary ammonium salts

2015 ◽  
Vol 3 (18) ◽  
pp. 3704-3713 ◽  
Author(s):  
Man He ◽  
Huining Xiao ◽  
Yuming Zhou ◽  
Peng Lu
Keyword(s):  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Antimicrobial Activities ◽  
Quaternary Ammonium Salts ◽  
Water Soluble ◽  
Ammonium Salts ◽  
Amphiphilic Copolymers ◽  
Methacrylate Monomers

Novel water-soluble amphiphilic copolymers with ciprofloxacin are prepared by copolymerization of methacrylate monomers containing ciprofloxacin and quaternary ammonium salt monomers.

XRD Study of Hydrophlogopite Intercalated with Alkyl Quaternary Ammonium Salt

2010 ◽  
Vol 178 ◽  
pp. 330-335
Author(s):  
Hong Juan Sun ◽  
Tong Jiang Peng ◽  
Hai Feng Liu ◽  
Jin Mei Sun
Keyword(s):  
Chain Length ◽  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Interlayer Spacing ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Ammonium Bromide ◽  
X Ray Diffraction ◽  
Xrd Study

Hydrophlogopite was modified with sodium and then organically intercalated with a series of alkyl quaternary ammonium salts. The organically intercalated samples were characterized by X-ray diffraction analysis (XRD) and the effect of alkyl quaternary ammonium salt on the interlayer spacing of hydrophlogopite was discussed. The results showed that if the same alkyl quaternary ammonium salt was used to intercalate hydrophlogopite, the interlayer spacing of hydrophlogopite increased gradually with the rise of the added amount of quaternary ammonium salt, and that if different quaternary ammonium salts with the same amount were used, the interlayer spacing increased gradually with the rise of the chain length of the alkyl quaternary ammonium salts. For the alkyl quaternary ammonium salts with large chain length (n>10), the inflection point for the increasing interlayer spacing of the intercalated hydrophlogopite is at about 0.5 times of CEC. When octadecyl trimethyl ammonium bromide is used as intercalation agent and the added amount is 5 times of CEC, the interlayer spacing of hydrophlogopite is relatively maximal.

scholarly journals Biological Activity of Quaternary Ammonium Salts and Their Derivatives

Pathogens ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 459 ◽  
Author(s):  
Dobrawa Kwaśniewska ◽  
Ying-Lien Chen ◽  
Daria Wieczorek
Keyword(s):  
Antimicrobial Activity ◽  
Biological Activity ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Food Spoilage ◽  
Biocidal Activity ◽  
Positive Role ◽  
Current State ◽  
Potential Use

Besides their positive role, microorganisms are related to a number of undesirable effects, including many diseases, biodeterioration and food spoilage, so when their presence is undesired, they must be controlled. Numerous biocides limiting the development of microorganisms have been proposed, however, in this paper the biocidal and inhibitory activity of quaternary ammonium salts (QASs) and their zwitterionic derivatives is addressed. This paper presents the current state of knowledge about the biocidal activity of QAS and their derivatives. Moreover, the known mechanisms of antimicrobial activity and the problem of emerging resistance to QAS are discussed. The latest trends in the study of surfactants and their potential use are also presented.

scholarly journals Investigations of the generality of quaternary ammonium salts as alkylating agents in direct C–H alkylation reactions: solid alternatives for gaseous olefins

2019 ◽  
Vol 17 (16) ◽  
pp. 4024-4030
Author(s):  
David Schönbauer ◽  
Manuel Spettel ◽  
Robert Pollice ◽  
Ernst Pittenauer ◽  
Michael Schnürch
Keyword(s):  
Quaternary Ammonium ◽  
Alkylating Agents ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Short Chain ◽  
Alkylation Reactions

C–H alkylation reactions using short chain olefins as alkylating agents could be operationally simplified on the lab scale by using quaternary ammonium salts as precursors for these gaseous reagents.

scholarly journals Biological Evaluation of Quaternary bis Ammonium Salt and Cetylpyridinum Bromide Against S. epidermidis biofilm

2013 ◽  
Vol 62 (4) ◽  
pp. 359-364
Author(s):  
Justyna Stefańska ◽  
Anna Pietruczuk-Padzik ◽  
Marta Struga ◽  
Maciej Borkowski ◽  
Stefan Tyski
Keyword(s):  
Ammonium Salt ◽  
Broad Spectrum ◽  
Quaternary Ammonium ◽  
Biological Evaluation ◽  
Quaternary Ammonium Compounds ◽  
Quaternary Ammonium Salts ◽  
Bacterial Biofilm ◽  
Ammonium Salts ◽  
Ammonium Compounds

Quaternary ammonium compounds are broad-spectrum bacteriocides widely used as antiseptics, disinfection and preservation agents. The aim of this study was to examine the activity of two quaternary ammonium salts, cetylpyridinum bromide and a newly synthesized quaternary bis ammonium salt, against S. epidermidis biofilm. The average values of killing efficiency for cetylpyridinum bromide ranged from 26.6% to 64.1% for all tested concentrations (0.125 to 8.0 microg x mL(-1)) and for quaternary bis ammonium salt the percentage of killing efficiency ranged from 59.7% to 88.4% for tested concentrations (from 2.0 to 128.0 microg x mL(-1)). Both tested compounds significantly affect staphylococcal biofilms, but any of used concentrations caused a total eradication of bacterial biofilm.

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