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.

Cinchona alkaloid-based chiral catalysts act as highly efficient multifunctional organocatalysts for the asymmetric conjugate addition of malonates to nitroolefins

2015 ◽  
Vol 13 (40) ◽  
pp. 10216-10225 ◽  
Author(s):  
Veeramanoharan Ashokkumar ◽  
Ayyanar Siva
Keyword(s):  
Michael Addition ◽  
Quaternary Ammonium ◽  
Conjugate Addition ◽  
Quaternary Ammonium Salts ◽  
Cinchona Alkaloid ◽  
Ammonium Salts ◽  
Addition Reactions ◽  
Chiral Catalysts ◽  
Reaction Conditions ◽  
Highly Efficient

New pentaerythritol tetrabromide based chiral quaternary ammonium salts have been prepared and used as organocatalysts for enantioselective Michael addition reactions between various nitroolefins and Michael donors under mild reaction conditions with very good chemical yields and ee's.

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.

Highly efficient reduction of carbonyls, azides, and benzyl halides by NaBH4 in water catalyzed by PANF-immobilized quaternary ammonium salts

2016 ◽  
Vol 18 (9) ◽  
pp. 2726-2735 ◽  
Author(s):  
Jianguo Du ◽  
Gang Xu ◽  
Huikun Lin ◽  
Guangwei Wang ◽  
Minli Tao ◽  
...  
Keyword(s):  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Polyacrylonitrile Fiber ◽  
Highly Efficient ◽  
Efficient Reduction ◽  
Benzyl Halides

Highly efficient, easily recyclable and reusable polyacrylonitrile fiber-supported quaternary ammonium salts for the reduction of aldehydes, ketones, azides, and benzyl halides in water using NaBH4 as the reducing reagent.

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.

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