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pi-Extended Indenofluorenes

机译:π扩展的茚并芴

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A series of -extended aromatic indenofluorene (IF) analogues with naphthalene and anthracene cores have been synthesized through acid-catalyzed intramolecular cyclization. The regioselectivity of the reaction is controlled by a combination of steric and electronic factors and in some cases several possible regioisomers have resulted from the same precursor. The effects of ring connectivity on the optoelectronic properties were investigated by DFT calculations, absorption/emission spectroscopy, cyclic voltammetry, and spectroelectrochemical studies. All regioisomers exhibited a redshift of their absorption/emission bands relative to the parent IF analogues, but the magnitude of this shift and other optoelectronic properties (luminescence quantum yield, etc.) depends on the ring connectivity in a less obvious manner.
机译:通过酸催化的分子内环化反应合成了一系列带有萘和蒽核的芳族茚并芴(IF)类似物。反应的区域选择性是由空间因素和电子因素共同控制的,在某些情况下,同一前体会产生几种可能的区域异构体。通过DFT计算,吸收/发射光谱,循环伏安法和光谱电化学研究,研究了环连接性对光电性能的影响。所有区域异构体均相对于其母体IF类似物表现出吸收/发射带的红移,但是这种移位的幅度和其他光电特性(发光量子产率等)以不太明显的方式取决于环的连接性。

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