A novel and efficient xanthenic dye-organometallic ion-pair complex for photoinitiating polymerization
A novel and efficient xanthenic dye-organometallic ion-pair complex for photoinitiating polymerization
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DOI：
10.1002/app.1677
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发表时间：
2001-09-06
影响因子：
3
通讯作者：
Fouassier, JP
中科院分区：
文献类型：
--
作者：
Grotzinger, C;Burget, D;Fouassier, JP
本文描述了玫瑰红二价阴离子 (RB) 和二茂铁盐 [Fc(+)] 形成的络合物的光化学。晶体的化学计量分析表明Fc(+):RB比例为2:1。使用荧光研究评估了复合物 RB(Fc) 在几种溶剂中的解离百分比。在大多数 RB(Fc) 以接触离子对形式存在的非极性介质中，复合物的光降解速率不受氧气存在的影响，并产生能够引发自由基聚合反应的光产物。因此，引发步骤显示出低氧抑制。事实上，在可见光光引发系统中，例如由呫吨染料（玫瑰红）、二茂铁盐、胺和氢过氧化物组成的系统中，用复合物RB(Fc)代替敏化染料RE，与苯甲酰氧化膦衍生物存在下获得的聚合效率相比，导致聚合效率提高（特别是在充气条件下）。 (C) 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81：2368-2376，2001。
The photochemistry of the complex formed between a Rose Bengal dianion (RB) and a ferrocenium salt [Fc(+)] is described in this article. Stoichiometric analysis of the crystal showed that the Fc(+):RB ratio is 2:1. The dissociation percentage of complex RB(Fc), in several solvents was evaluated using fluorescence studies. In nonpolar media, in which most of the RB(Fc), exists as contact ion pairs, the photodegradation rate of the complex was found to be unaffected by the presence of oxygen and led to photoproducts capable of initiating a radical polymerization reaction. Because of this, the initiation step showed low oxygen inhibition. In fact, in a visible-light photoinitiating system such as one composed of xanthene dye (Rose Bengal), ferrocenium salt, amine, and hydroperoxide, substituting the complex RB(Fc), for the sensitizing dye RE led to an increase in efficiency of the polymerization (especially under aerated conditions) as compared to that obtained in the presence of benzoyl phosphine oxide derivatives. (C) 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 2368-2376, 2001.