Quaternary ammonium salts of phenylglyoxylic acid as photobase generators for thiol-promoted epoxide photopolymerization

2014 ◽  
Vol 5 (22) ◽  
pp. 6577-6583 ◽  
Author(s):  
H. Salmi ◽  
X. Allonas ◽  
C. Ley ◽  
A. Defoin ◽  
A. Ak
Keyword(s):  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Phenylglyoxylic Acid ◽  
Photobase Generators

A novel series of photobase generators (PBGs), which are quaternary ammonium salts of phenylglyoxylic acid (PA) having the ability to generate strong bases such as 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) or 1,1,3,3-tetramethylguanidine (TMG), was synthesized.

Thioxanthone acetic acid ammonium salts: highly efficient photobase generators based on photodecarboxylation

RSC Advances ◽  
2015 ◽  
Vol 5 (66) ◽  
pp. 53342-53348 ◽  
Author(s):  
Xiaoqing Dong ◽  
Peng Hu ◽  
Guigang Zhu ◽  
Zhiquan Li ◽  
Ren Liu ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Quaternary Ammonium ◽  
Active Species ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Highly Efficient ◽  
Photobase Generators

Novel photobase generators, which contain thioxanthone as the chromophore and different quaternary ammonium salts as latent active species, can efficiently catalyze the thiol–epoxy polymerization via photoinduced decarboxylation.

scholarly journals Stability of Quaternary Ammonium Salts in Various Solvents and their Use as Photobase Generators.

2001 ◽  
Vol 14 (2) ◽  
pp. 153-154 ◽  
Author(s):  
Masahiro Tsunooka ◽  
Hideki Tachi ◽  
Takayuki Yamamoto ◽  
Keitaro Akitomo ◽  
Masamitsu Shirai
Keyword(s):  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Photobase Generators

Study on Duel Photo-Curing Properties of Quaternary Ammonium Salt Ionic Liquid as Photobase Generator

2014 ◽  
Vol 893 ◽  
pp. 815-818 ◽  
Author(s):  
Rong Zhong ◽  
Rong Hua Xiong ◽  
Lai Xing Pang
Keyword(s):  
Ionic Liquid ◽  
Free Radical ◽  
Quaternary Ammonium ◽  
Uv Curing ◽  
Quaternary Ammonium Salts ◽  
Order Reaction ◽  
Ammonium Salts ◽  
First Order ◽  
Photobase Generators ◽  
Photo Curing

Two quaternary ammonium tetraphenyl borates salt photobase generators were synthesized using 2-naphthoymethylene as chromophores, and triethylene diamine, pyridine. Their UV curing properties were studied in different environment. The results showed that their photolysis kinetics was of the first order reaction. Quaternary ammonium salts with the UV irradiation can initiate free radical photopolmerization and cure the epoxy resin.

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...

scholarly journals Green Accelerated Synthesis, Antimicrobial Activity and Seed Germination Test of Quaternary Ammonium Salts of 1,2-bis(4-pyridyl)ethane

Molecules ◽  
2019 ◽  
Vol 24 (13) ◽  
pp. 2424 ◽  
Author(s):  
Tăbăcaru ◽  
Botezatu ◽  
Horincar ◽  
Furdui ◽  
Dinică
Keyword(s):  
Escherichia Coli ◽  
Triticum Aestivum ◽  
Seed Germination ◽  
Quaternary Ammonium ◽  
Pathogenic Bacteria ◽  
Classical Method ◽  
Triticum Aestivum L ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Radicle Growth

A family of fifteen quaternary ammonium salts (QAs), bearing the 1,2-bis(4-pyridyl)ethane core, were obtained using for the first time two different green methods, such as microwave (MW) and ultrasounds (US) irradiation, with very good yields and in much shorter times compared to the classical method, and an assay on their antimicrobial action against Escherichia coli (E. coli) was carried out. While 12 to 24 hours were required for complete alkylation of 1,2-bis(4-pyridyl)ethane by reactive halogenated derivatives in anhydrous solvent under reflux conditions, MW and US irradiation reduced the reaction time and the desired products were achieved in a few min. One of the aims of this study was to evaluate the antibacterial potential of the synthesized QAs against pathogenic bacteria, along with their impact on germination activity of wheat seeds (Triticum aestivum L.). The antibacterial activity of the QAs against Escherichia coli was explored by determining the minimum inhibitory concentration (MIC). The MIC values varied from 0.312 to 2.5 mg/mL, highlighting the lowest values attained for the derivatives containing methoxy, chlorine and benzofurane functional groups. The viability of aerobic bacteria was determined with the Tetrazolium/Formazan Test, a method that was found to be the best alternative approach with respect to the difuzimetric method. Seeds of Triticum aestivum L. were used for the evaluation of the germination indicators, such as seed germination (SG), the relative seed germination (RSG), the relative radicle growth (RRG), and the seed germination index (GI). The toxicity studies of QAs 1, 4 and 7, at two different concentrations, showed no inhibitory effect on seed germination.

Interaction of water-insoluble quaternary ammonium salts with the hydrated silica surface

1996 ◽  
Vol 32 (6) ◽  
pp. 331-334
Author(s):  
V. V. Turov ◽  
O. A. Zaporozhets ◽  
O. Yu. Nadzhafova ◽  
V. V. Sukhan
Keyword(s):  
Quaternary Ammonium ◽  
Silica Surface ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Hydrated Silica
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