反,反-1,4-双[β-(4-取代苯基)乙烯基]苯衍生物紫外光谱的溶剂效应

The Solvent Effects on UV-Vis Spectra of Some 1 ,4 Bis[β-(4-Substituted Phenyl)-Ethenyl] Benzene Derivatives

测定了某些反,反-1,4-双[β-(4-取代苯基)乙烯基]苯衍生物在17种溶剂及不同比例的非极性混合溶剂中的紫外光谱,一般,最大吸收峰位置随溶剂的折光系数增大而红移,同时,在极性、非极性及不同比例非极性混合溶剂中紫外光谱的■_(max)值与(n^(2)-1)/(2n^(2)+1)之间呈线性关系。

In this paper, the UV-Vis spectra of some 1, 4-bis [β-(4-substituted phenyl)-ethenyl] benzene derivatives in seventeen solvents or binary nonpolar mixed solvents (e.g., benzene-cyclohexane, bezene-n-hexane, carbon disulfide-cyclohexane, etc.) have been measured. In general, the absorption maxima λmax have a bathochromic shift with increasing refractive index n of the solvent. Some linear relationships between ■_(max )and n or (n^(2) -1)/(2n^(2) +1) are obtained, respectively.