Enantiomerically pure quaternary ammonium salts with a chiral alkyl chain N(CH3)(n-C3H7)2(sec-C4H9)I: Synthesis and physical studies

Chirality ◽  
2008 ◽  
Vol 20 (10) ◽  
pp. 1085-1091 ◽  
Author(s):  
Ruxandra Gheorghe ◽  
Lise-Marie Chamoreau ◽  
Josef Kapitan ◽  
Nikolaï S. Ovanesyan ◽  
Sergei M. Aldoshin ◽  
...  
Keyword(s):  
Quaternary Ammonium ◽  
Alkyl Chain ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Enantiomerically Pure

Antimicrobial Activity of Quaternary Ammonium Salts of Some Saturated Heterocycloalkyl Amines [1]

1979 ◽  
Vol 34 (5-6) ◽  
pp. 485-486 ◽  
Author(s):  
Ivan Lacko ◽  
Ferdinand Devínsky ◽  
Ľudovít Krasnec ◽  
Dušan Mlynarčik
Keyword(s):  
Antimicrobial Activity ◽  
Quaternary Ammonium ◽  
Alkyl Chain ◽  
Heterocyclic Ring ◽  
Substantial Effect ◽  
Quaternary Ammonium Salts ◽  
Heterocyclic Amines ◽  
Ammonium Salts ◽  
Activity Change ◽  
Inhibition Concentration

Abstract N,N-Dialkyl Ammonium Salts of Saturated Heterocyclic Amines, Antimicrobial Activity Antimicrobial activity of N-alkyl-N-dodecylpiperidinium bromides and N-ethyl-N-dodecylheterocycloalkyl ammonium bromides (pyrrolidine, morpholine, perhydroazepine) deter­ mined on grampositive and gramnegative bacteria, yeasts and moulds, presented as minimum inhibition concentration (MIC). Comparison of the effect of change of structure: lenghtening of alkyl chain, change of heterocyclic ring. Change in the lenght of alkyl chain markedly affects the antimicrobial activity, change of heterocyclic ring has no substantial effect. The most active compounds were N-heptyl-and N-hexyl-N-dodecylpiperidinium bromides.

The influence of cation and anion structure of new quaternary ammonium salts on adsorption and leaching

Holzforschung ◽  
2005 ◽  
Vol 59 (2) ◽  
pp. 190-198 ◽  
Author(s):  
Jadwiga Zabielska-Matejuk
Keyword(s):  
Scots Pine ◽  
Quaternary Ammonium ◽  
Chemical Structure ◽  
Alkyl Chain ◽  
Chloride Ion ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Physical Processes ◽  
Water Leaching ◽  
Pine Wood

Abstract This study examined the effect of cation and anion chemical structure of new quaternary ammonium and imidazolium compounds (QAC, bis-QAC, IC, bis-IC) on the adsorption onto Scots pine wood (Pinus sylvestris L.) and resistance to water leaching. The group of copper (II) modified QACs, containing copper-chloro-acetate complexes in the anion structure, was also examined. The length of alkyl hydrophobic substituents in the cation structure significantly influences adsorption. The adsorption characteristics were statistically related to the alkyl chain length of new quaternary ammonium salts (quantitative correlations between CMC and adsorption values). Bis-ICs adsorb onto Scots pine wood with the greatest difficulty and the slowest and are also leached to the greatest degree. A varied adsorption of chloride ion cations and a several times higher leaching of chlorides than cations of the examined salts from the saturated wood were observed. The anion modification of bis-QAC and bis-IC of copper-chloro-acetate complexes causes decreased adsorption and resistance to the leaching of these salts. As a result of the performed regression analysis of Langmuir and Freundlich adsorption isotherms, it was found that the adsorption of the examined compounds onto wood was governed by both chemical and physical processes. New quaternary ammonium and imidazolium compounds represent potential wood preservatives.

Safety Assessment of Trimoniums as Used in Cosmetics

2012 ◽  
Vol 31 (6_suppl) ◽  
pp. 296S-341S ◽  
Author(s):  
Lillian C. Becker ◽  
Wilma F. Bergfeld ◽  
Donald V. Belsito ◽  
Ronald A. Hill ◽  
Curtis D. Klaassen ◽  
...  
Keyword(s):  
Quaternary Ammonium ◽  
Safety Assessment ◽  
Alkyl Chain ◽  
Expert Panel ◽  
Safety Data ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Entire Group ◽  
Product Usage ◽  
Cosmetic Product

Quaternary ammonium salts, including alkyl chain, alkanol, and polymer derivatives (trimoniums) are used in cosmetics mainly as surfactant-cleansing agents, hair-conditioning agents, and antistatic agents.  The Cosmetic Ingredient Review Expert Panel reviewed the relevant animal and human data and noted gaps in the available safety data for some of the trimomiums.  The available data on many of the trimoniums are sufficient, however, and similar structural activity relationships, functions in cosmetics, and cosmetic product usage supported extending these data to the entire group.  These ingredients were determined to be safe in the present practices of use and concentration when formulated to be nonirritating.

scholarly journals Unprecedented and Readily Tunable Photoluminescence from Aliphatic Quaternary Ammonium Salts

2021 ◽  
Author(s):  
Saixing Tang ◽  
Zihao Zhao ◽  
Tianjia Yang ◽  
Yunzhong Wang ◽  
Xiaohong Chen ◽  
...  
Keyword(s):  
Quaternary Ammonium ◽  
Alkyl Chain ◽  
Phase Transfer ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Excitation Wavelength ◽  
Mechanical Stimuli ◽  
Dual Emission ◽  
Phase Transfer Catalysts ◽  
Counter Ions

Compounds bearing aliphatic amines could be emissive under proper conditions. Their ionized counterparts, quaternary ammonium salts (QASs), which are widely used as phase-transfer catalysts, ionic liquids, disinfectants and surfactants, however, are known as luminescence quenchers and thought to be nonemissive. Here we report the unprecedented intrinsic fluorescence-phosphorescence dual emission from a diversity of QASs, which can also be finely regulated by excitation wavelength, alkyl chain length, counter ions, mechanical stimuli, etc. The bright photoluminescence along with distinct afterglow and tunable multicolor emissions enables advanced multimode anticounterfeiting for QAS solids. This finding refreshes the cognition of QASs and would inspire emerging applications by utilizing their intrinsic luminescence. Furthermore, it opens opportunities for the investigation of QAS related processes and functions in a photophysical approach and affords strong implications for the fabrication of novel nonconventional luminophores.

Synthesis and stability of 1-aminoalkylphosphonic acid quaternary ammonium salts

2021 ◽  
Author(s):  
Tomasz K. Olszewski ◽  
Anna Brol
Keyword(s):  
Phosphonic Acid ◽  
Quaternary Ammonium ◽  
Alkylating Agent ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Aminoalkylphosphonic Acid

An effective protocol for quaternization of simple 1-aminoalkylphosphonic acids under basic conditions and using Me2SO4 as convenient alkylating agent is reported. In the course of reaction phosphonic acid quaternary ammonium...

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