Efficient Self-Contained Photoacid Generator System Based on Photochromic Terarylenes
作者:Ruiji Li、Takuya Nakashima、Rui Kanazawa、Olivier Galangau、Tsuyoshi Kawai
DOI:10.1002/chem.201603768
日期:2016.11.2
A series of highly sensitive neutral photoacid generators (PAGs) based on photochromic terarylenes was prepared. Like the example presented herein, these compounds show a subsequent thermal elimination of a Brønsted acid after a light‐triggered 6π‐electrocyclization, concomitant with the hexatriene aromatization. A novel type of molecular systems was developed, in which one thiazolyl moiety was replaced
制备了一系列基于光致变色亚芳基的高灵敏度中性光致产酸剂(PAG)。像本文所示的实例一样,这些化合物显示出在轻触发的6π电环化之后伴随布朗三烯酸的热消除,同时伴随着己三烯的芳构化。开发了一种新型的分子系统,其中一个噻唑基部分被噻吩基取代。根据溶剂和酸源的性质,产生酸的量子产率(QY)可能高达0.6。对酸源的比较研究清楚地表明,芳香族离去基团倾向于消除分子系统的光效率。还准备了第二种类型,其中杂芳环的性质与我们之前的示例相同,但是其顺序已被修改。因此,在非极性溶剂中实现了第二级改进,将QY值提高到0.7。最后,我们证明了甲磺酸释放型PAG在化学放大正性抗蚀剂系统中作为光催化剂。