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对不同体系的取代苯基化合物的荧光发射光谱中的取代基效应进行了研究.其中,对于二苯乙烯衍生物、1,4-双(取代苯乙炔基)苯,激发态取代基参数(σexcc)的单参数方程的相关系数均在0.98以上;对于取代苯乙烯、取代α-甲基苯乙烯和反,反-1,4-双(β-取代苯乙烯基)苯,则用Hammett参数(σp)和σexcc的双参数方程关联,相关系数均在0.96以上.结果表明,激发态取代基参数能用于共轭化合物的荧光发射能量的定量研究.表7,参21.
The substituent effect in the fluorescence emission spectra of the substituted phenyl compounds of different systems was studied, in which, for the stilbene derivatives, 1,4-bis (substituted phenylethynyl) benzene, the parameter of excited state substituent ) Of the single-parameter equation are all above 0.98; for the substituted styrene, instead of α-methylstyrene and trans, 1,4-bis (β-substituted styryl) benzene, the Hammett parameter σp) and σexcc, the correlation coefficients are both above 0.96.The results show that the excited state substituent parameters can be used to quantitatively study the fluorescence emission energy of conjugated compounds.