Evaluation of sensitizing ability of barbiturate-functionalized non-ionic cyanine dyes; application for photoinduced radical generation system initiated by near IR light
Evaluation of sensitizing ability of barbiturate-functionalized non-ionic cyanine dyes; application for photoinduced radical generation system initiated by near IR light
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DOI：
10.1016/j.jphotochem.2004.08.010
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发表时间：
2005-03-15
影响因子：
4.3
通讯作者：
Kitamura, A
中科院分区：
文献类型：
--
作者：
Karatsu, T;Yanai, M;Kitamura, A
研究了近红外(近红外)、离子(D1)和非离子(D2、D3)菁染料在光引发自由基聚合体系中的增感性能。非离子菁染料在有机溶剂中的溶解度远高于离子菁染料。光诱导自由基聚合体系由敏化染料(D1-D3)、2，4，6-三(三氯甲基)-S-三嗪(TCT，作为自由基引发剂)和多官能团丙烯酸酯单体(DPHA)组成。在近红外光下，所有染料在光诱导自由基聚合体系中都表现出敏化能力。非离子菁染料D2和D3的增感能力高于D1。IR和UV-Vis研究表明，D2和D3的高增感能力是染料与聚合物基质中的TCT相互作用的结果，促进了染料向TCT的电子转移。(C)2004爱思唯尔B.V.保留所有权利。
The sensitizing abilities of near infrared (near IR)-absorbing ionic (D1) and non-ionic (D2 and D3) cyanine dyes in a photoinduced radical polymerization system were evaluated. The solubility in an organic solvent of non-ionic cyanine dyes is much higher than that of an ionic cyanine dye. The photoinduced radical polymerization system consists of a sensitizing dye (D1-D3), 2,4,6-tris(trichloromethyl)-s-triazine (TCT, as a radical genetrator), and a poly-functional acrylate monomer (DPHA) in the binder polymer. All dyes showed a sensitizing ability in the photoinduced radical polymerization systems by near IR light. Non-ionic cyanine dyes, D2 and D3, showed a higher sensitizing ability than D1. From the IR and UV-vis studies, it was revealed that the high sensitizing ability of D2 and D3 is a result of an interaction between the dye and TCT in the polymer matrices, promoting the electron-transfer from the dyes to the TCT. (C) 2004 Elsevier B.V. All rights reserved.