Photoinitiators with functional groups. VII. Covalently bonded camphorquinone - Amines
Photoinitiators with functional groups. VII. Covalently bonded camphorquinone - Amines
复制标题
DOI：
10.1002/pola.20318
复制
发表时间：
2004-10-01
影响因子：
--
通讯作者：
Moszner, N
中科院分区：
文献类型：
--
作者：
Ullrich, G;Herzog, D;Moszner, N
樟脑醌 (CQ) 是一种在牙科应用中广泛使用的光引发剂 (PI)，由于二酮和胺基非常接近，因此与芳香胺共价键合，以提高电子和质子转移效应的速率。选择10-溴樟脑醌和10-溴甲基樟脑醌作为与基于4-二甲氨基苯甲酸的含羧基芳香胺进行酯化的合适前体。通过紫外光谱和差示扫描光量热法在丙烯酸月桂酯中研究了新型光引发体系的性能。与物理混合物相比，在所有情况下都获得了相似甚至更好的性能。令人惊讶的是，特别是10-乙酰基衍生物7-9和18被发现具有高反应性。与CQ/4-二甲氨基苯甲酸乙酯相比，光聚合速率提高了2倍。通过不同PI浓度的光差示扫描量热实验证实了分子内反应。 (C) 2004 年 Wiley 期刊公司。
Camphorquinone (CQ), a widely used photoinitiator (PI) in dental applications, was covalently bonded to aromatic amines to enhance the rate of electron and proton transfer effect due to the close vicinity of the diketone and the amine group. 10-bromocamphorquinone and 10-bromomethylcamphorquinone were selected as suitable precursors for esterification with the carboxyl group containing aromatic amines based on 4-dimethylaminobenzoic acid. Properties of the new photoinitiating systems were investigated by UV spectroscopy and differential scanning photocalorimetry in lauryl acrylate. Compared to physical mixtures, in all cases similar or even better performance was obtained. Surprisingly, 10-acetyl derivatives 7-9 and 18 especially, were found to be highly reactive. Compared to CQ/ethyl 4-dimethylaminobenzoate, the rate of photopolymerization was increased by a factor of up to 2. Intramolecular reaction was confirmed by photo-differential scanning calorimetry experiments with varying PI concentrations. (C) 2004 Wiley Periodicals, Inc.