The Preparation of Some ι-Bromoalkyl Quaternary Ammonium Salts
作者:Allan P. Gray、Dorothy C. Schlieper、Ernest E. Spinner、Chester J. Cavallito
DOI:10.1021/ja01618a069
日期:1955.7
Monomeric asymmetric two- and three-cationic monomethine cyanine dyes as novel photoinitiators for free-radical polymerization
作者:Janina Kabatc、Jerzy Pączkowski
DOI:10.1016/j.dyepig.2009.12.007
日期:2010.7
Several two- and three-cationic monomethine cyanine dyes, possessing a benzothiazolium moiety were synthesized and evaluated as initiators of the free radical polymerization of 2-ethyl-2-(hydroxymethyl)-1,3-propanediol triacrylate under visible light. Dyes bearing 1-methylpyrrolidinium, 4-methylmorpholinium, pyridinium and 3-(N,N-dimethylamino)propan-1-ol substituents were useful initiators. All derivatives absorbed in the region 510-570 nm and displayed molar absorption coefficients of 40 000-60 000 dm(3) mol(-1) cm(-1). A kinetic study of photoinitiated polymerization performed with the use of the electron donor n-butyltriphenylborate salt showed that the dyes were efficient two-component photoinitiators. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.