シクロデキストリンを用いたN-フェニルグリシンのレーザー2光子イオン化

概要

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Transient absorption measurement using 266-nm laser flash photolysis technique was performed with regard to N-phenylglycine(NPG) in the absence and presence of cyclodextrins (CDs) in water, lonization of NPG occurred within the laser flash (5 ns) to give NPG radical cation (NPG^<.+>) and solvated electron (e'^-). The ionization yields of NPG in the present of α-CD, β-CD, and γ-CD, depended on the properties of the complexes with CD, generated form from two-photon excitation with simultaneous irradiation to 266-nm laser. It is confirmed that the two-photon ionization (TPI) proceeds through two-step, two-photon excitation with the S_0→S_1 (intermolecular charge transfer state)→S_n transition. The TPI is inhibited for NPG in the cavities of CDs.