作者:Herbert Meier、Dirk Ickenroth、Ulf Stalmach、Kaloian Koynov、Ayi Bahtiar、Christoph Bubeck
DOI:10.1002/1099-0690(200112)2001:23<4431::aid-ejoc4431>3.0.co;2-j
日期:2001.12
Oligo(1,4-phenyleneethynylene)s 1a−e, with solubilizing propoxy side chains, were prepared by use of Hagihara−Sonogashira coupling reactions. The synthetic strategy was based on a building block system and on the use of trimethylsilyl and triisopropylsilyl protecting groups that could be cleaved selectively. The extension of the conjugation with an increasing number of repeat units provokes a bathochromic
具有增溶丙氧基侧链的低聚(1,4-亚苯基乙炔基)1a-e 是通过使用 Hagihara-Sonogashira 偶联反应制备的。合成策略基于构建块系统和可以选择性裂解的三甲基甲硅烷基和三异丙基甲硅烷基保护基团的使用。随着重复单元数量的增加,共轭的延伸引起长波长吸收的红移和第二超极化率|γ|的超线性增加。相应的三次谐波生成 (THG) 测量是使用聚苯乙烯矩阵和可变激光波长进行的。我们得出结论,共轭长度远大于 5 个重复单元。