Photo- and Electro-Driven Molecular Switching System of Aryl-Bridged Photochromic Radical Complexes

The Journal of Physical Chemistry. a
Katsuya YamamotoJiro Abe

Abstract

Fast photochromic molecules have received much interest in the potential application as a real-time switching trigger in material and biological chemistry. Pentaarylbiimidazole (PABI) and phenoxyl-imidazolyl radical complex (PIC) are one of the fast photochromic molecules based on imidazolyl radicals. Because the photochromic reaction of these fast photochromic molecules proceeds from the optically forbidden S1 state, it is difficult to estimate the excitation energy to induce the photochromic reactions by spectroscopic techniques. In this study, we performed the electrochemical measurements for PABI and PIC to investigate the electronic properties and to determine the S0-S1 transition energies. In addition, we also revealed that the electrochemical reduction of PABI and PIC generates the radical anion which spontaneously shows the C-N bond breaking reaction to produce the radical species. The initial photochromic dimer is reproduced by the reversible oxidation of the anion species. This characteristic photochromic and electrochromic properties can be applicable to the photowritable electrochromic devices with high spatial resolution.

References

Nov 25, 2000·Angewandte Chemie·V BalzaniJ F Stoddart
Mar 20, 2003·Journal of the American Chemical Society·Andrea Peters, Neil R Branda
Jul 16, 2005·Organic Letters·Yoshihisa MoriyamaMasahiro Irie
Mar 12, 2009·Journal of the American Chemical Society·Yuta Kishimoto, Jiro Abe
Nov 10, 2012·Scientific Reports·Norihito IshiiJiro Abe
Nov 21, 2012·Journal of the American Chemical Society·Takuya NakashimaTsuyoshi Kawai
May 31, 2014·Chemical Communications : Chem Comm·Hiroaki Yamashita, Jiro Abe
Apr 8, 2015·Journal of the American Chemical Society·Hiroaki YamashitaJiro Abe
Jan 21, 2016·Chemical Communications : Chem Comm·Takahiro IkezawaJiro Abe
Dec 26, 2017·Journal of the American Chemical Society·Izumi YonekawaJiro Abe

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Citations

May 18, 2020·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Hiroki ItoJiro Abe
May 5, 2020·Journal of the American Chemical Society·Ryosuke UsuiYoichi Kobayashi
Apr 9, 2020·Journal of the American Chemical Society·Aya KometaniJiro Abe
Mar 20, 2019·Journal of the American Chemical Society·Katsuya MutohJiro Abe

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