Results 211 to 220 of about 61,390 (300)

Poly(arylene piperidine) Quaternary Ammonium Salts Promoting Stable Long‐Lived Room‐Temperature Phosphorescence in Aqueous Environment

Advances in Materials, 2022
Room‐temperature phosphorescence (RTP) materials have garnered considerable research attention owing to their excellent luminescence properties and potential application prospects in anti‐counterfeiting, information storage, and optoelectronics. However,
Chang Wang, Lunjun Qu, Xiaohong Chen, Qian Zhou, Yan Yang, Yan Zheng, Xian Zheng, Liang Gao, J. Hao, Lingyun Zhu, Bingxue Pi, Chaolong Yang   +11 more
semanticscholar   +1 more source

The effect of quaternary ammonium salts with different chain lengths on copper filling behavior in blind holes of printed circuit board

Journal of Micromechanics and Microengineering, 2022
The rapid and defect free blind hole copper super filling is the key technology to ensure the quality and development of printed circuit boards (PCBs).
Yu Zhang, Xixun Shen, Miaomiao Zhou, Wei Huang, Qunjie Xu   +4 more
semanticscholar   +1 more source

The influence of bioactive glyoxylate bearing Schiff base on antifungal and antioxidant activities to chitosan quaternary ammonium salts.

Carbohydrate Polymers, 2021
In this study, to investigate the influence of glyoxylate bearing Schiff base on bioactivity to chitosan quaternary ammonium salts, different chitosan derivatives were synthesized by ion exchange of glyoxylate bearing Schiff base with chitosan quaternary
Yingqi Mi, Yuan Chen, Wenqiang Tan, Jingjing Zhang, Qing Li, Zhanyong Guo   +5 more
semanticscholar   +1 more source

Quaternary ammonium salts of chitosan. A critical overview on the synthesis and properties generated by quaternization

, 2020
The quaternary ammonium salts of chitosan are water soluble derivatives which keep the promise for real life applications in a large realm of biomedical fields, such as antimicrobial products, gene therapy, drug delivery, wound healing, tissue ...
Bianca-Iustina Andreica, Xinjian Cheng, L. Marin   +2 more
semanticscholar   +1 more source

para-Selective C-H Borylation of Aromatic Quaternary Ammonium and Phosphonium Salts.

Angewandte Chemie, 2022
Aromatic ammonium and phosphonium salts are important synthetic intermediates and multifunctional materials, but para-selective functionalization of the aromatic salts remains a challenge.
Shuo Lu, Tianyu Zheng, Jia-ni Ma, Zhangming Deng, Shengmeng Qin, Yu Chen, Yong Liang   +6 more
semanticscholar   +1 more source

Quaternary ammonium salts as inhibitors of acetylcholine esterase

Biochimica et Biophysica Acta, 1951
Abstract Quaternary ammonium salts show practically no inhibition of the hydrolytic action of liver esterase. They protect ACh estrase against inrreversible combination with TEPP, although the two types of inhibitors attach themselves to different points of the active surface. Quaternary ammonium salts also inhibit the hydrolysis of uncharged esters (
F, BERGMANN, A, SHIMONI
openaire   +3 more sources

SALTING-IN BY QUATERNARY AMMONIUM SALTS

Canadian Journal of Chemistry, 1965
The solubility of benzene in substituted quaternary ammonium bromide solutions has been measured by ultraviolet absorption. The solubility is found to increase in the presence of such salts as R4−nHnN+Br− where R is an alkyl group and n varies between 0 and 3; a smooth transition in behavior is observed when passing from simple salts to long-chained ...
J. E. Desnoyers, G. E. Pelletier, C. Jolicoeur   +2 more
openaire   +1 more source

Efficient inhibition of montmorillonite swelling through controlling flexibly structure of piperazine-based polyether Gemini quaternary ammonium salts

Chemical Engineering Journal, 2020
Currently, it remains a great challenge to maintain clay stability in water and prevent shear dispersion of the clay lamellae. Herein, a series of piperazine-based polyether Gemini quaternary ammonium salts (QAs) with different alkyl chains and linker ...
Lihua Zhou, Yang He, S. Gou, Qin Zhang, Ling Liu, Lan Tang, Xian Zhou, M. Duan   +7 more
semanticscholar   +1 more source

The antioxidant and antifungal activity of chitosan derivatives bearing Schiff bases and quaternary ammonium salts.

Carbohydrate Polymers, 2019
In order to improve the antioxidant and antifungal activity of chitosan, eight chitosan derivatives containing Schiff bases and quaternary ammonium salts were synthesized via an intermediate 6-O-chloroacetyl-2-N,N,N-trimethyl quaternary ammonium salt ...
Lijie Wei, Wenqiang Tan, Gang Wang, Qing Li, Fang Dong, Zhanyong Guo   +5 more
semanticscholar   +1 more source

Effect of the structure of chitosan quaternary ammonium salts with different spacer groups on antibacterial and antibiofilm activities.

International Journal of Biological Macromolecules
In this study, three types of dodecyl chitosan quaternary ammonium salts, each with different spacer groups were synthesized. These chitosan derivatives are N',N'-dimethyl-N'-dodecyl-ammonium chloride-N-amino-acetyl chitosan (DMDAC), N'-dodecyl-N ...
Lin Wang, Yu Pang, M. Xin, Mingchun Li, Lulu Shi, Yangfan Mao   +5 more
semanticscholar   +1 more source