Thermal Modulation Voltammetric Observatin of Cyanide Ion in the Membrane Part of an Ion-Selective Electrode Based on a Polymer Modified with Cobalt Phthalocyanine in Acetonitrile

ArticleAnalytical sciences : the international journal of the Japan Society for Analytical Chemistry. 17(8):991-994 (2001)journal articl

Observation of Ion-Transfer of Photochemical Reaction Products of p-Aminodiphenylamine across an Aqueous | 1,2-Dichloroethane Solution Interface by Photo-Modulation Voltammetry with an Ultraviolet Laser

ArticleAnalytical sciences : the international journal of the Japan Society for Analytical Chemistry. 23(9): 1143-1146 (2007)journal articl

Activation Effects of a Platinum Electrode by Laser Pulse Irradiation on the Electro-Oxidation of Glucose in Alkaline Solution

ArticleAnalytical sciences : the international journal of the Japan Society for Analytical Chemistry. 20(8): 1171-1177 (2004)journal articl

Adsorption Behavior of Metal Ions onto a Bovine Serum Albumin (BSA) Membrane Monitored by Means of an Electrode-Separated Piezoelectric Quartz Crystal

ArticleAnalytical sciences : the international journal of the Japan Society for Analytical Chemistry. 21(3): 281-286 (2005)journal articl

Determination of the Standard Entropy Changes of Ion Transfer for 1-Alkylpyridinium Ions by Thermal Modulation Voltammetry with Laser Heating at a Water/1,2-Dichloroethane Interface

When laser light impinges upon a liquid-liquid interface between an optically transparent aqueous and opaque organic phase from the aqueous to organic phase, the temperature at the interface and the interfacial region rises. Using this rise in temperature, we have proposed and developed thermal modulation voltammetry at an interface between two immiscible electrolyte solutions (TMV-ITIES) and have determined the standard entropy changes of ion transfer, Delta S-tr degrees'(O -> W). In this work, we have determined Delta S-tr degrees'(O -> W) for four 1-alkylpridinium ions, namely 1-methylpyridinium ion (MePy+), 1-ethylpyridinium ion (EtPy+), 1-propylpyridinium ion (PrPy+), and 1-buthylpyridinium ion (BuPy+) by TMV-ITIES. As a result, we obtained the Delta S-tr degrees'(O -> W) values of 108.0 +/- 0.5 (n = 3), 75.8 +/- 4.4, 55.6 +/- 1.2, and 42.7 +/- 0.9 J K-1 mol(-1) for MePy+, EtPy+, PrPy+, and BuPy+, respectively. From these values of Delta S-tr degrees'(O -> W), we have suggested that MePy+, EtPy+, and PrPy+ are classified as water structure-breaking ions and BuPy+ as a weak water structure-making ion. Further, we discuss the relationship between the standard free energy change, Delta G(tr)degrees'(O -> W), and Delta S-tr degrees'(O -> W) of ion transfer for 1-alkylpridinium ions and tetraalkylammonium ions.ArticleANALYTICAL SCIENCES. 30(5):595-599 (2014)journal articl

Potentiometric Response Mechanism of a Poly(acrylamide)-phthalocyaninato Tin(II)Film Coated Platinum Electrode in Acetonitrile and N,N-Dimethylacetamide

ArticleAnalytical sciences. 19(7): 991-994 (2003)journal articl

Effect of Ultraviolet Irradiation on Proton Transfer Facilitated by 5,10,15,20-Tetraphenyl-21H,23H-porphine and Its Metal Complexes at a Water/1,2-Dichloroethane Interface

We examined photochemical effects by ultraviolet irradiation on facilitated proton transfer at a water/1,2-dichloroethane (W/DCE) interface by ion-transfer voltammetry using a Xe flash lamp. 5,10,15,20-Tetrapheny1-21H,23H-porphine (H2TPP) or its metal complex, such as cobalt (Co(II)TPP), zinc (Zn(II)TPP), and nickel (Ni(II)TPP) complexes, was added into the DCE phase as an ionophore for the facilitated proton transfer. After we irradiated the W/DCE interface through the W phase, the voltammetric waves for proton transfer facilitated by H2TPP and Co(II)TPP were remarkably enhanced and shifted to the lower potential region, compared to those before irradiation. We confirmed from the pH and argentometric titrations that such enhancements and shifts of the waves were caused by hydrogen chloride (HCI) produced by photodecomposition of DCE. On the other hand, the waves for proton transfer facilitated by Zn(II)TPP and Ni(II)TPP were very small from the beginning, and showed neither enhancement nor any shift upon irradiation.ArticleANALYTICAL SCIENCES. 33(12):1407-1413 (2017)journal articl