Synthesis and Self-Organization of Fluorene-Conjugated Bisimidazolylporphyrin and Its Optical PropertiesReport as inadecuate




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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.



Abstract A conjugated-bisimidazolylporphyrin bridged by bisethynylfluorene 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





Author: Kazuya Ogawa †,* , Naoyuki Makiuchi ‡ and Yoshiaki Kobuke ‡,§

Source: http://mdpi.com/



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