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Efficient Two-Photon Absorbing Chromophores with Fine-Tuned л-Bridges

Published online by Cambridge University Press:  01 February 2011

Lixin Zheng ,
Takafumi Sassa  and
Alex K-Y. Jen
Lixin Zheng
Affiliation:
Department of Materials Science and Engineering, 302 Roberts Hall, University of Washington, Seattle, WA 98195-2120
Takafumi Sassa
Affiliation:
Department of Materials Science and Engineering, 302 Roberts Hall, University of Washington, Seattle, WA 98195-2120
Alex K-Y. Jen
Affiliation:
Department of Materials Science and Engineering, 302 Roberts Hall, University of Washington, Seattle, WA 98195-2120
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Abstract

A new series of symmetric two-photon absorbing chromophores with various л-bridges were synthesized. It has been shown that the spectra of two-photon absorption and two-photon induced fluorescence can be fined tuned by structural variations in the electronic nature and twist angle of л-bridges of D-л-D type chromophores. These chromophores exhibited large twophoton absorption cross-sections (up to 1800 GM), which were determined by two-photon induced fluorescence technique using femtosecond pulse excitation. The colors of two-photon pumped emission of these chromophores varied from blue to red (433 ∼ 604 nm) as the structure of л-bridges changed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 725: Symposium P – Organic and Polymeric Materials and Devices-Optical, Electrical, and Optoelectronic Properties , 2002 , P4.21
Copyright
Copyright © Materials Research Society 2002

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