Synthesis and Fluorescence Properties of Two Oxadiazole-Based Multibranched Chromophores

doi:10.7517/j.issn.1674-0475.2007.03.176

Abstract

Abstract: Two new multibranched chromophores,named as NO-G2 and BO-G2,with the same peripheral branch of oxadiazole-unit,but different molecular core,that is,carbazole for NO-G2 and benzonitrile for BO-G2,were synthesized and characterized by mass spectra and 1H NMR spectra,respectively.These two oxadiazole-based multibranched chromophores show the molecular architecture of "D-A-A’-A-D" for BO-G2 and"D’-A-D-A-D’"for NO-G2, which have the different ability of intramolecular charge transfer.The measured absorption and fluorescence spectra have shown that NO-G2 exhibits nonlinear absorption than BO-G2,owing to the former possessing pn junction and resultant more obvious intramolecular charge transfer.

Key words: oxadiazole-based multibranched compounds, pn junction, intramolecular charge transfer, nonlinear absorption

CLC Number:

RUI Wen-wen, JIANG Wan-li, DING Xue-xia, WANG Xiao-mei. Synthesis and Fluorescence Properties of Two Oxadiazole-Based Multibranched Chromophores[J]. Imaging Science and Photochemistry, 2007, 25(3): 176-182.

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Synthesis and Fluorescence Properties of Two Oxadiazole-Based Multibranched Chromophores

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