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Issue 40, 2009
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Two-photon absorption and lasing properties of new fluorene derivatives

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Abstract

Linear photophysical properties, two-photon absorption (2PA), and lasing effects of new fluorene derivatives, 2,7-bis(4-(phenylthio)styryl)-9,9-didecyl-9H-fluorene (1) and 2,7-bis(4-(phenylsulfonyl)styryl)-9,9-didecyl-9H-fluorene (2), have been investigated. The relatively strong solvatochromic behavior of symmetrical compounds 1 and 2 can be explained by the phenomenon of symmetry breaking in the electronic distribution of the first excited state. The 2PA spectra of 1 and 2 were obtained over a broad spectral range (480–880 nm) by two-photon-induced fluorescence and open aperture Z-scan methods, in which excited state absorption and stimulated emission processes were considered in the fitting procedure. Maximum values of 2PA cross-sections ∼1300–1900 GM were obtained for 1 and 2 in the two-photon-allowed absorption bands at ∼660 nm. Efficient lasing of 1 and 2 was demonstrated in a nondispersive flat resonator with picosecond transverse pumping at 355 nm. Lasing efficiencies were ∼25–30% in this resonator, and independent of solvent.

Graphical abstract: Two-photon absorption and lasing properties of new fluorene derivatives

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Publication details

The article was received on 24 Nov 2008, accepted on 03 Mar 2009 and first published on 31 Mar 2009


Article type: Paper
DOI: 10.1039/B820950B
Citation: J. Mater. Chem., 2009,19, 7498-7502
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    Two-photon absorption and lasing properties of new fluorene derivatives

    K. D. Belfield, M. V. Bondar, C. O. Yanez, F. E. Hernandez and O. V. Przhonska, J. Mater. Chem., 2009, 19, 7498
    DOI: 10.1039/B820950B

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