Journal
DYES AND PIGMENTS
Volume 92, Issue 1, Pages 633-641Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2011.06.028
Keywords
Thiophene; Linear absorption; Single-photon excited fluorescence; Two-photon excited fluorescence; Calculation; TPA data storage
Funding
- National Natural Science Foundation of China [21071001, 50873001]
- Education committee of Anhui Province [KJ2010A030]
- team for Scientific Innovation Foundation of Anhui Province [2006KJ007TD]
- Science and Technological Fund of Anhui Province for Outstanding Youth [10040606Y22]
- Anhui University, Ministry of education
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Four novel dyes are prepared by thiophene as pi bridge between carbazole central core and other terminal groups by Suzuki and Heck coupling reactions. These dyes are fully characterized by IR, H-1 NMR, C-13 NMR, MS and elemental analysis. Linear absorption, single- and two-photon excited fluorescence in various solvents are experimentally investigated. The calculated two-photon absorption cross sections of 9-Hexyl-3,6-di((5-phenyl)-2-thienyl)carbazole (1), 9-Hexyl-3,6-di((5-thienyl)-2-thienyl)carbazole (2), 9-Hexyl-3,6-di((5-p-vinylpyridyl)-2-thienyl)-carbazole (3) and 9-Hexyl-3,6-di-((5-o-vinylpyridyl)-2-thienyl) carbazole (4) for the lowest excited state are 537.84, 550.76, 1292.95 and 1340.40 x 10(-50) cm(4) s photon(-1), respectively. Calculated and experimental data have shown that thiophene as pi electron bridge improves the two-photon absorption cross sections greatly. Two-photon optical data recording experiments have been carried out at 820 nm laser radiation. (C) 2011 Elsevier Ltd. All rights reserved.
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