固态类杂芪分子一阶超极化率测定及溶剂效应

用溶致变色法研究溶剂对反式－（４－Ｎ，Ｎ－二甲氨基）－（４－Ｎ－甲基吡啶基）杂芪碘（ＤＡＳＰＩ）、反式、（２－Ｎ－比咯基）－（４－Ｎ－甲基吡啶基）杂芪碘３＊（ＭＰＰＳＩ），反式－２（２－吡咯基）－２（４－Ｎ－比啶基）杂芪磺（ＰＰＳＩ）、反式－（２－呋喃基）－（４－Ｎ＿甲基吡啶基）杂芪碘（ＦＰＳＩ）、反式－（２－噻吩基）－（４－Ｎ－甲基吡啶基）杂芪磺（ＴＰＳＩ）和反式＿４－Ｎ－Ｌ在吡啶基）杂芪碘（Ｐ

Determination of the Molecular First-order Hyperpolarizabilities of Six Stilbzolium-like Dyes in Solid State and the Solvent Effects

By using the solvatochromism, we have studied the solvent effects on the molecular first-order hyperpolarizabilities of six stilbazolium like dyes: trans-4-(N,N-dimethylamino)-(4-N-methylpyridinio)-stilbazolium iodide (DAPSI),trans-(N-methylpyrrol-2-yl)-4-(N-methyl-pyridinio)-stilbazolium iodide(MPPSI),trans-(pyrrol-2-yl)-4-(N-methyl-pyridinio)-stilbazolium iodide(PPSI),trans-(furan-2-yl)-4-(N-methyl-pyridinio)-stilbazolium iodide (FPSI) and trans-(thiophene-2-yl)-4-(N-methyl-pyridinio)-stilbazolium iodide (TPSI),and trans-(4-methyl-pyridinio)-stilbazolium iodide(pSI),and obtained the results that the molecular hyperpolarizabilities are in linear correlation with the solvent polarity, E T(30),and introduced the concept that the effects on the energy levels of the compound by the solvent is equavalent to those by the surrounding molecules of the compound itself ,from which we calculated the molecular first order hyperpolarizabilities β s xxx of the six dyes in pure solid state, as -46,7,-7 1,-6 7,-3 1,-2 2,and 0 55×10 -27 esu for DAPSI, MPPSI, PPSI, FPSI, TPSI and PSI, respectively. And we also obtained the perfect linearity relationship between the β s xxx and the electron excessivities of the donor for the latter five dyes.