摘要
合成了6个新型AπDπA型3,6-二取代咔唑多极生色分子,用红外光谱、核磁共振等对其结构进行了表征.用Z-扫描方法研究了这些分子的三阶非线性光学性质.实验结果表明,这些分子具有较大的三阶极化率,延长共轭链长度,增加电子受体强度,引入芳香杂环,都能增强分子内电荷转移,这种效应增加了分子的跃迁矩,使三阶极化率增大.
Six 3,6-di-acceptor-substituted carbazole multipolar chromophores with two aromatic bridges of the two-dimensional conjugated AπDπA system were designed, synthesized and characterized by NMR and IR. The third-order NLO properties of the carbazole chromophores were investigated using single-beam Z-scan technique with picosecond laser pulses at 1064 nm. Results indicate that larger third-order nonlinear optical polarizabilities γ can be readily obtained in such carbazole chromophores because of the incorporation with heteroaromatic rings, increasing of withdrawing group strength and molecular conjugation length.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2005年第23期2141-2146,共6页
Acta Chimica Sinica
基金
国家自然科学基金(No.10374013)
教育部博士点基金(No.20030286012)资助项目.
关键词
三阶光学非线性
咔唑衍生物
有机多极分子
Z-扫描
third-order nonlinear optical polarizability
carbozole derivative
organic multipolar molecule
Z-scan
