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Int. J. Mol. Sci. 2013, 14(1), 322-331;

Synthesis and Self-Organization of Fluorene-Conjugated Bisimidazolylporphyrin and Its Optical Properties

Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
Present address: Interdisciplinary Graduate School of Medicine and Engineering, Division of Medical and Engineering Science, Life Environment Medical Engineering, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511, Japan.
Present address: Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Received: 26 November 2012 / Revised: 14 December 2012 / Accepted: 17 December 2012 / Published: 21 December 2012
(This article belongs to the Special Issue Molecular Self-Assembly 2012)
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A conjugated-bisimidazolylporphyrin bridged by bis(ethynylfluorene) was synthesized and organized into linear polymer through self-coordination having mean molecular weights, Mw and Mn, of ~2.1 × 105 Da and ~1.6 × 105 Da, respectively. A large two-photon absorption cross section value of 3.4 × 105 GM (per dimer unit) was observed. This value was comparable to that of the previously reported self-assembled linear polymer consisting of butadiyne-bridged imidazolylporphyrins. The two-photon absorption properties could be controlled by tuning the wavelength and absorption intensity of the one-photon absorption. View Full-Text
Keywords: porphyrin; self-assembly; two-photon absorption; fluorene; imidazole; Z-scan porphyrin; self-assembly; two-photon absorption; fluorene; imidazole; Z-scan

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Ogawa, K.; Makiuchi, N.; Kobuke, Y. Synthesis and Self-Organization of Fluorene-Conjugated Bisimidazolylporphyrin and Its Optical Properties. Int. J. Mol. Sci. 2013, 14, 322-331.

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