Resonance Two-Photon Ionization of Diarylethene in the Presence of Cyclodextrin | Zendy

Michihiro Hara | Zendy; Makoto Miwa | Zendy; Tatsuya Takeshita | Zendy; Shouhei Watanabe | Zendy

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Resonance Two-Photon Ionization of Diarylethene in the Presence of Cyclodextrin

Author(s) -

Michihiro Hara,

Makoto Miwa,

Tatsuya Takeshita,

Shouhei Watanabe

Publication year - 2013

Publication title -

international journal of photoenergy

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.426

H-Index - 51

eISSN - 1687-529X

pISSN - 1110-662X

DOI - 10.1155/2013/374180

Subject(s) - diarylethene , photochemistry , chemistry , ionization , quantum yield , photochromism , solvated electron , flash photolysis , aqueous solution , fluorescence , ion , organic chemistry , optics , radiolysis , physics , quantum mechanics , reaction rate constant , kinetics

The transient absorption of the diarylethene 1,2-bis(2,4-dimethyl-5-phenyl-3-thienyl)-3,3,4,4,5,5-hexafluoro-1-cyclopentene (DE) was measured using 266 nm laser flash photolysis in the presence of various cyclodextrins (CDs) in aqueous solvent. Ionization of DE occurred within the laser flash (5 ns) to give the DE radical cation and water-solvated electron. The electron was generated by two-photon excitation through simultaneous irradiation with 266 nm laser light, and the ionization quantum yields of DE in the presence of α-CD, β-CD, m-β-CD, and γ-CD depended on the properties of the DE/CD complexes. These results suggest that useful two-photon ionization occurred for these complexes. The ionization quantum yield of DE was found to increase in aqueous solution after the addition of m-β-CD (50 mM), in which m-β-CD likely controlled the photochromic reactivity of DE

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