TY - GEN
T1 - Electrochemical behavior of iron and several iron complexes in hydrophobic room temperature molten salts
AU - Yamigata, Masaki
AU - Tachikawa, Naoki
AU - Katayama, Yasushi
AU - Miura, Takashi
PY - 2006/12/1
Y1 - 2006/12/1
N2 - The electrochemical behavior of Fe(III)/Fe(II), FeCp2 +/FeCp2, FeCl4-/ FeCl 42- FeBr4-/FeBr4 2- and Fe(CN)63-/Fe(CN)6 4- couples in 1-n-butyl-1-methylpyrrolidinium bis(trifluoromethansulfone) imide (BMPTFSI) room-temperature molten salt was studied by means of cyclic voltammetry. The electrode reaction of Fe(III)/Fe(II) on a platinum electrode was quasi-reversible due to the slow electron transfer while those of other iron complex couples were reversible. The slow electron transfer of the Fe(III)/Fe(II) couple may be related to the strong interaction of the Fe(III)/Fe(II) redox center with surrounding bulky TFS- anions. Each iron complex couple showed its own redox potential, indicating the ligands of Cp-, C-1, Br- and CN- are not replaced with TFSI- having a small donor number. The electrochemical behavior of Fe(CN)63TFe(CN) 64- couples was also investigated in several molten salts which had different organic cations. The redox potential seems to be affected by the acceptor property of the organic cation.
AB - The electrochemical behavior of Fe(III)/Fe(II), FeCp2 +/FeCp2, FeCl4-/ FeCl 42- FeBr4-/FeBr4 2- and Fe(CN)63-/Fe(CN)6 4- couples in 1-n-butyl-1-methylpyrrolidinium bis(trifluoromethansulfone) imide (BMPTFSI) room-temperature molten salt was studied by means of cyclic voltammetry. The electrode reaction of Fe(III)/Fe(II) on a platinum electrode was quasi-reversible due to the slow electron transfer while those of other iron complex couples were reversible. The slow electron transfer of the Fe(III)/Fe(II) couple may be related to the strong interaction of the Fe(III)/Fe(II) redox center with surrounding bulky TFS- anions. Each iron complex couple showed its own redox potential, indicating the ligands of Cp-, C-1, Br- and CN- are not replaced with TFSI- having a small donor number. The electrochemical behavior of Fe(CN)63TFe(CN) 64- couples was also investigated in several molten salts which had different organic cations. The redox potential seems to be affected by the acceptor property of the organic cation.
UR - http://www.scopus.com/inward/record.url?scp=40249084801&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=40249084801&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:40249084801
SN - 9781566775144
T3 - Proceedings - Electrochemical Society
SP - 493
EP - 502
BT - Molten Salts XIV - Proceedings of the International Symposium
T2 - 206th ECS Meeting
Y2 - 3 October 2004 through 8 October 2004
ER -