Thermal modulation voltammetry at a 1,2-dichloroethane/water microinterface using visible laser heating with optically absorbing supporting electrolyte.
Thermal modulation voltammetry (TMV) using laser heating at a liquid/liquid microinterface is a useful technique for determining the standard entropy change of ion transfer. In this work, for achieving TMV using a visible laser as a heating source at a 1,2-dichloroethane (DCE)/water microinterface, we used an optically absorbing supporting electrolyte, i.e., crystalviolet tetrakis(4-chlorophenyl)borate (CVTClPB). CVTClPB served well not only as a supporting electrolyte but also as an optical absorber in the DCE solution, and thereby, well-defined linear sweep (LS) and TM voltammograms could be obtained. On the basis of LS and thermal modulation (TM) voltammograms obtained with CVTClPB, the standard entropy changes of ion transfer for six model ions were successfully determined.
Furuhashi
Shoko
S
Department of Chemistry, Faculty of Science and International Young Researchers Empowerment Center, Shinshu University, Matsumoto, Nagano 390-8621, Japan.
Terauchi
Yui
Y
Makita
Naoko
N
Tatsumi
Hirosuke
H
Hinoue
Teruo
T