Determination of the Structural Features of a Long-Lived Electron-Transfer State of 9-Mesityl-10-methylacridinium Ion

作者：Hoshino Manabu^*; Uekusa Hidehiro; Tomita Ayana; Koshihara Shin ya; Sato Tokushi; Nozawa Shunsuke; Adachi Shin ichi; Ohkubo Kei; Kotani Hiroaki; Fukuzumi Shunichi

来源：Journal of the American Chemical Society, 2012, 134(10): 4569-4572.

DOI：10.1021/ja300602h

Extensive efforts have been devoted to developing electron donor acceptor systems that mimic the utilization of solar energy that occurs in photosynthesis. X-ray crystallographic analysis shows how absorbed photon energy is stabilized in those compounds by structural changes upon photoinduced electron transfer (ET). In this study, structural changes of a simple electron donor acceptor dyad, 9-mesityl-10-methylacridinium cation (Acr(+)-Mes), upon photoinduced ET were directly observed by laser pump and X-ray probe crystallographic analysis. The N-methyl group in Acr(+) was bent, and a weak electrostatic interaction between Mes and a counteranion in the crystal (ClO4) was generated by photoinduced ET. These structural changes correspond to reduction and oxidation due to photoinduced ET and directly elucidate the mechanism in Acr(+)-Mes for mimicking photosynthesis efficiently.

• 出版日期2012-3-14