溶致变色法测定类杂芪染料分子-阶超极化率

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.     

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     

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 (DAPSI) ,反式 (2 N 甲基吡咯基 ) (4 N 甲基吡啶基 )杂芪碘 (MPPSI) ,反式 (2 吡咯基 ) (4 N 甲基吡啶基 )杂芪碘 (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 )杂芪碘 (TPSI)和反式 (4 N 甲基吡啶基 )杂芪碘 (PSI)的分子一阶超极化率 (βxxx)的影响 ,揭示了溶剂极性 (ET(30 ) )与类杂芪染料的 βxxx值间很好的线性关系和影响规律 ,引入了溶剂化效应对待测化合物分子能级的影响与待测化合物分子间相互作用能级间存在等效能级的概念 ,从溶剂极性 (ET(30 )值 )与 βxxx值间的线性关系求出了在纯固态下类杂芪染料的 βsxxx值 ,及基态与第一激发态间跃迁能和最大吸收波长 .证明了MPPSI、PPSI、FPSI、TPSI和PSI在纯固态下的 βsxxx值与给电子取代基的富电子性间有很好的线性关系