6′－对位取代苯乙烯基吲哚啉吡喃紫外可见光谱

Ultraviolet Spectra of 6′-Substituted Styryl Indoline Spirobenzopyrans

讨论了题示化合物在紫外可见光谱中的取代基效应，得到γ＿１（１／λ＿１）与｜σ＿ｐ｜相关性良好的线性关系。另外，通过对该类化合物部花菁稳定性的研究表明，８′－硝基对开环式的稳定性起着重要的作用。

The substituent effects of the title compounds on the UV/Vis spectra are discussed.Thecorrelations between γ_1(1/λ_1)and σ_p is fairly good. The stability of merocyamin is also studied,Theresults shows that the 8′-nitro plays a major role in stablization of the ring-opened structure。