研究了结构规整有序的寡聚噻吩修饰的9,9'-螺二芴衍生物在溶液中和在固体膜状态下的光物理性质,发现在四氢呋喃的稀溶液中,随着有效共轭长度的增加这些化合物的最大吸收峰和发射峰发生了明显的红移.实验结果表明,9,9'-螺二芴骨架中的9位螺碳原子明显地阻断了二个共轭片段的共轭效应,使它们成为了二个独立的共轭链节.此外,还进一步研究了这些化合物的电化学聚合性质.%The photophysical properties of oligothiophenes-functionalized 9,9'-spirobifluorene derivatives in solution and in solid state were investigated in detail. The enhanced red-shift was observed from the absorption and the photoluminescence (PL) spectra of these derivatives in dilute THF solution with the increase of thiophene unit at one branch of 9,9'-spirobifluorene identical with the increased π-electron delocalization and the more effective conjugation length of the whole molecular system. The investigation of the photophysical properties of these compounds further demonstrated that the sp3-hybrid carbon at the spiro-center completely obstructed the correlation between two branches of the 9,9' -spirobifluorene system and made every branch become an independent chromophore. The electrochemical polymerization of 6b as a representative was also investigated.
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