物理化学学报 >> 1999, Vol. 15 >> Issue (04): 338-344.doi: 10.3866/PKU.WHXB19990410

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溶致变色法测定类杂芪染料分子-阶超极化率

詹传郎, 王夺元   

  1. 中国科学院感光化学研究所，北京德外北沙滩 100101
  • 收稿日期:1998-07-15 修回日期:1998-10-28 发布日期:1999-04-15
  • 通讯作者:

A Solvatochromic Method for Determining The First-Order Hyperpolarizabilities of Several New stilbzolium-like Dyes

Zhan  Chuan-Lang, Wang  Duo-Yuan   

  1. Institute of Photographic Chemistry,The Chinese Academy of Sciences,Beijing 100101
  • Received:1998-07-15 Revised:1998-10-28 Published:1999-04-15
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摘要：

用溶致变色法测定了三种新型类杂芪染料和两种参比类荣芪染料：反式-（2-吡咯基）-（4-N-甲基吡啶啶基）杂芪碘（PPSI）、反式-（2-呋喃-4-N-甲基吡啶基）杂芪碘（FPSI）、反式-（2-噻吩基）-（4-N-甲基吡啶基）杂芪碘（TPSI）和反式-（2-N-甲基吡咯基）-（4-N甲基吡啶基）杂芪碘（MPPSI）、反式-（4-N，N-二甲胺基）-（4-N-甲基吡啶基）杂芪碘（DAPSI）在八种溶剂中的分子一阶超极化率（高达10－27~10－26esu）．通过研究PPSI、FP－SI和TPS在八种溶剂中的分子一阶超极化率（βxxx）与给电子取代基的富电子性（p（C）D）的关系，进一步从实验上证明化合物的（βxxx）值与给电子取代基的富电子性之间有很好的线性关系．同时，实验也表明这五种类杂芪染料分子在激发态时的偶极矩比其在基态时的永久偶极矩要小．

关键词: 类杂芪染料, 吡啶碘盐, 荣致变色, 分子-阶超极化率

Abstract:

Using solvatochromic method the determination of the molecular first-order hyperpolarizabilities of three novel stilbazolium-like dyes and twoknown stilbazolium-like dyes: trans-(pyrrol-2yl) -4-(N-methyl-pyridinio) -stilbazolium iodide(PPSI), trans-(furan-2-yl) -4-(N-methyl - pyridinio)-stilbazolium iodide (FPSI), trans-(thiophene-2-yl) -4- (N-methyl-pyridinio)-stilbazolium iodide (TPSI) and trans-(N-methylpyrrol-2-yl) 4-(N-methyl-pyridinio)-stilbazolium iodide (MPPSI), trans(4-N, N-dimethylamino) -(4- N-methylpwidinio) -stilbazolium iodide(DAPSI) in 8 solvents is presented, and their molecular hyperpolarizabilities are as high as 10-26 -10-27 esu. We have proved that the molecular hyperpolarizabilities is in linear correlation with the electron excessivities of donors for PPSI,FPSI and TPSI in each solvent, this relation give us a way to design molecules that have larger hyperpolallzabilities. Furthermore, our experiments show that the molecules of the five stilbazolium-like dyes have...更多 a larger dipolemoment, when they are in ground state than in excited state.

Key words: Stilbazolium-like dye, Pyridium, Hyperpolarizability, Solvatochromisml