Open AccessMechanistic Studies on TiO2 Photoelectrochemical Radical Cation [2 + 2] Cycloadditions
Author(s) -
Genki Horiguchi,
Hidehiro Kamiya,
Yohei Okada
Publication year - 2020
Publication title -
journal of the electrochemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.258
H-Index - 271
eISSN - 1945-7111
pISSN - 0013-4651
DOI - 10.1149/1945-7111/abcffc
Subject(s) - chemistry , photochemistry , electron transfer , redox , photoelectrochemical cell , electron acceptor , photoelectrochemistry , electrochemistry , water splitting , radical ion , excited state , radical , photocatalysis , electron transport chain , electron donor , semiconductor , platinum , inorganic chemistry , materials science , catalysis , electrode , organic chemistry , optoelectronics , ion , biochemistry , physics , nuclear physics , electrolyte
In addition to electrochemical and photochemical approaches, the photoelectrochemical method using semiconductors as photoelectrodes is a third type of approach in the field of synthetic organic chemistry that enables precise control of single electron transfer (SET) reactions. Herein, we report mechanistic studies on TiO 2 photoelectrochemical redox neutral reactions, where both reductive and oxidative SET are involved, using radical cation [2 + 2] cycloadditions as models. In the presence of platinum nanoparticles or molecular oxygen as electron sink or electron acceptor, respectively, the mechanistic details for the photoelectrochemical reactions can be investigated because the excited electron at the conduction band of TiO 2 is removed.