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Synthesis and Nonlinear Optical Properties of a New A‐π‐A Two‐Photon Compound Utilizing Dibenzothiophene as Center
Author(s) -
ZHANG Xian,
YU XiaoQiang,
YAO JinShui,
JIANG MinHua
Publication year - 2007
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200790347
Subject(s) - chemistry , dibenzothiophene , chromophore , fluorescence , photochemistry , absorption (acoustics) , two photon absorption , solvent , quantum yield , two photon excitation microscopy , photon , molecular physics , optics , organic chemistry , catalysis , laser , physics
Abstract A new two‐photon material, 3 E ,6 E ‐bis(2‐pyrid‐4′‐ylvinyl)dibenzothiophene (BPVDBT), has been firstly synthesized by an efficient Pd‐catalyzed Heck coupling route. The single‐ and two‐photon fluorescence, quantum yields, lifetimes, solvent effects of the chromophore were studied in detail and the compound exhibited solvent‐sensitivity. The fluorescence intensity ( I out ) and input excitation intensity ( I in ) can fit in well with the quadratic parabolas, which indicates that the up‐converted fluorescence was induced by the two‐photon absorption (TPA). TPA cross‐section of BPVDBT has been measured using the two‐photon‐induced fluorescence method, whose value is 14.24×10 −50 cm 4 ·s·photon −1 ·molecule −1 at 750 nm. The experimental results confirm that BPVDBT is a good two‐photon absorbing chromophore with an A‐π‐A type.