Synthesis, optical properties and ultrafast dynamics of a 2,1,3-benzothiadiazole-based red emitter with intense fluorescence and large two-photon absorption cross-section
Chemistry, Applied
; Engineering, Chemical
; Materials Science, Textiles
研究领域[WOS]:
Chemistry
; Engineering
; Materials Science
英文摘要:
A new 2,1,3-benzothiadiazole-based red fluorescent compound with a D-A-D type structure was synthesized and characterized. The central 2,1,3-benzothiadiazole core was symmetrically connected via the 4,7-positions with two donor groups in which the 7-position of a fluorenyl ring was substituted with a carbazol-9-yl moiety and the 2-position was substituted by a 5-thienyl moiety. The carbazol moieties were further derivatized by two 2-naphthyl moieties at the 3,6-positions. Femtosecond laser spectroscopic techniques including excited state fluorescence and pump-probe technique investigations, together with steady state absorption and one-photon fluorescence spectra, were employed to systematically investigate the optical properties and ultrafast dynamics of the new compound in tetrahydrofuran solution. It shows a large two-photon absorption cross-section and high fluorescence quantum yield, indicating potential application in two-photon fluorescence imaging field. The ultrafast dynamics results reveal competition between a pure excited state relaxation process and stimulated radiation in the red wavelength region. (C) 2011 Published by Elsevier Ltd.
1.Fudan Univ, Dept Phys, Surface Phys Lab, State Key Lab, Shanghai 200433, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 3.S China Univ Technol, State Key Lab Phys & Chem Luminescence, Guangzhou 510640, Peoples R China 4.S China Univ Technol, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Peoples R China 5.Shanghai Univ, Dept Phys, Shanghai 200000, Peoples R China
Recommended Citation:
Wang, Yaochuan,Huang, Ju,Zhou, Hui,et al. Synthesis, optical properties and ultrafast dynamics of a 2,1,3-benzothiadiazole-based red emitter with intense fluorescence and large two-photon absorption cross-section[J]. DYES AND PIGMENTS,2012,92(1):573-579.
