Counteranion Sensitization Approach to Photoinitiated Free Radical Polymerization
摘要:
A novel polymeric type II photoinitiator, namely poly(ethylene oxide) dimethylammonium thioxanthonemethyl-carboxylate (PEO-NH+(Me)(2) TX-CH2COO-), possessing both photochromophoric and hydrogen donating groups in the structure was synthesized and characterized. In contrast to existing type II photoinitiators, the present photoinitiator initiates free radical polymerization by counteranion anion excitation even in the absence of added hydrogen donors. The photoinitiator can be applied to the polymerization of monomers soluble in organic solvents or water.
Copper(II) thioxanthone carboxylate as a photoswitchable photocatalyst for photoinduced click chemistry
作者:Sajjad Dadashi-Silab、Yusuf Yagci
DOI:10.1016/j.tetlet.2015.09.155
日期:2015.11
A new efficient copper photocatalyst to photochemically induce the copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) reaction without the need for additional ligands is reported. The thioxanthone carboxylate moiety was combined with copper(II) ions by a simple ion exchange reaction to form a copper(II) thioxanthone carboxylate photocatalyst. In the catalytic process, intramolecular photoinduced
Thioxanthone acetic acid ammonium salts: highly efficient photobase generators based on photodecarboxylation
作者:Xiaoqing Dong、Peng Hu、Guigang Zhu、Zhiquan Li、Ren Liu、Xiaoya Liu
DOI:10.1039/c5ra09314g
日期:——
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.
One-Component Thioxanthone Acetic Acid Derivative Photoinitiator for Free Radical Polymerization
作者:Duygu S. Esen、Gokhan Temel、Demet K. Balta、Xavier Allonas、Nergis Arsu
DOI:10.1111/php.12218
日期:2014.3
Acetic acid-based thioxanthone (TXCH2 COOH) was synthesized and characterized and used as a photoinitiator for freeradical photopolymerization of methyl methacrylate (MMA) in the absence and presence of a tertiary amine (MDEA) in different solvents. Different absorption properties were observed depending on the solvent. Fluorescence and phosphorescence experiments were also carried out successfully
Vis-sensitive photoinitiators for light-emitting diode (LED) polymerization is still an emerging challenge as LEDs are being developed into the predominant light sources. In this work, a series of new functionalized photoinitiators, containing thioxanthones and oxime-esters as functional groups, was designed and straightforwardly synthesized in two steps. The structures of the photoinitiators were studied
随着 LED 逐渐发展成为主要光源,开发用于发光二极管 (LED) 聚合的有效可见光敏感光引发剂仍然是一个新出现的挑战。在这项工作中,设计了一系列包含噻吨酮和肟酯作为官能团的新型功能化光引发剂,并分两步直接合成。使用1 H NMR、13研究了光引发剂的结构C NMR 和高分辨率质谱法。光物理性质的结论表明,从 360 nm 到 405 nm 的长波长吸收使得所研究的噻吨酮衍生物作为 UV-Vis LED 下有价值的光引发剂非常有吸引力。还通过实时 FTIR 光谱详细研究了结构-反应性关系。基于进一步的光解和在线1 H NMR 活动,预期可能的光解机制。通过适当的分子设计,可以直接合成新的功能化光引发剂,并且它们显示出比其母体噻吨酮更先进的引发能力。
Active ray curable composition, active ray curable ink composition for inkjet printing, active ray curable adhesive composition, and method for stabilizing active ray curable composition
申请人:Ricoh Company, Ltd.
公开号:EP2647676A2
公开(公告)日:2013-10-09
An active ray curable composition, including: a photobase generator; a polymerizable compound; and an acid, wherein the photobase generator is a salt of a carboxylic acid and a basic compound, wherein a ratio by mole of a carboxyl group of the carboxylic acid : a basic functional group of the basic compound is 1 : 1, and wherein the acid is an acid that loses a function thereof as acid by light or heat.