Direct evidence of hydrogen-bonding and/or protonation effect on p-benzoquinone electrochemical reduction by in situ IR spectroelectrochemical study

Investigation on redox mechanism of 1,4-naphthoquinone by in situ FT-IR spectroelectrochemistry

“…The dimerization of anion radicals for some substituted quinones has been proposed. However, to the best of our knowledge, the dimerization has not been reported for unsubstituted quinones like p-benzoquinone in aprotic media [4].…”

“…ACCEPTED MANUSCRIPT 2 involving the formation of the radical anion intermediate in the first step and the dianion in the second step [3][4][5][13][14][15]. The electrochemical redox process, including the possible electrode reactions and proton-transfer reactions, can be depicted by the well-known nine-membered square scheme [6,16,17].…”

“…The latter undergoes normal two-step one-electron process in CH 3 CN, forming BQ •− in the first step and BQ 2− in the second step [4]. Why is the electrochemical reduction mechanism of Q in CH 3 CN quite different from that of BQ ?…”

“…The electrochemical reduction of quinones has been studied widely [1][2][3][4][5][6]. The study can not only provide the redox mechanism, but also help us understand the different roles which quinones and their intermediates play in the electron transfer process in living organisms [7][8][9][10][11][12].…”

Synthesis, electrochemistry and IR spectroelectrochemistry of bisferrocenyl bridged benzene derivates

“…However, the information obtained from voltammetric data are not enough to elucidate the electron transfer mechanisms of molecules containing multiple noninteracting or interacting redox centers. Recently, we introduce a method called IR Spectroelectrochemistry Cyclic Voltabsorptometry [11,12] used to investigate the electrochemical process, which can provide the direct evidences for the assignment of each redox transition during CV scans. Thus, the approach can be applicable to the study of a wide range of complex electrochemistry process.…”