排序方式: 共有28条查询结果,搜索用时 15 毫秒
1.
2.
Harbans L. Jindal Kiyoshi Matsuda Reita Tamamushi 《Journal of Electroanalytical Chemistry》1978,90(2):197-201
The electrode reaction of Zn(II) at a DME in aqueous solutions of (NH4)2SO4 has been studied by d.c. and square-wave polarography at 25.0±0.1°C. The electrochemical kinetic parameters for the reaction are determined. The appearance of the second wave in the square-wave polarogram has been attributed to the low values of the rate parameter and the transfer coefficient. 相似文献
3.
A new method of determining electrochemical kinetic parameters by square-wave polarography was presented, in which the faradaic current at θ/2, θ being the half-period of superimposed square-wave voltage, was used for the analysis. The method gave the following kinetic parameters for the electrode reaction, Zn(II) + 2e(Hg), in aqueous solutions at 25° C: kcθ=0.0052 cm s?1 and αc=0.36 in 1 M KCl, kcθ=0.011 cm s?1 and αc=0.30 in 1 M KBr, and kcθ=0.020 cm s?1 and αc=0.52 in 1 M KNCS. Induced adsorption of Zn(II) on the dropping mercury electrode was suggested in solutions containing thiocyanate ions. 相似文献
4.
Reita Tamamushi 《Journal of Electroanalytical Chemistry》1975,65(1):263-273
The electrochemical Peltier effect was studied at a gold electrode in solutions containing some Fe(II)/Fe(III) redox couples by measuring the local temperature change in the electrode/solution interphase under controlled-potential and controlled-current polarization. Relative values of the electrochemical Peltier coefficient for the cathodic process at equilibrium potential, which is denoted by (Πc)I=0, were determined by analyzing the observed temperature change as a function of current. The values of (Πc)I=0 were found to be positive for the Fe(H2O)62+/Fe(H2O)63+ systems in HClO4 (1 M), HNO3 (1 M), H2SO4 (0.5 M), and HCl (1 M), their magnitudes being very similar in the first three acid solutions, but smaller in the HCl solution. On the other hand, a negative value of (Πc)I=0 was obtained in the case of a Fe(CN)64?/Fe(CN)63? couple in a H2SO4 (0.5 M) solution. Such a difference in the Peltier coefficient is considered to be due to the difference in the ionic species of iron involved in the electrode reaction. 相似文献
5.
6.
7.
Miyata K Tamamushi R Ohkubo A Taguchi H Seio K Santa T Sekine M 《Organic letters》2006,8(8):1545-1548
[reaction: see text] A bicyclic 4-N-carbamoyldeoxycytidine derivative (1, dC(hpp)) geometrically locked was synthesized as a new fluorescent nucleobase. The hybridization properties of oligodeoxynucleotides containing dC(hpp) were investigated by use of T(m) analysis. It was found that dC(hpp) forms stable base pairs not only with the complementary guanine base, but also with the adenine base. Interestingly, the fluorescence of dC(hpp) was suppressed only when a dC(hpp)-dG base pair was formed. 相似文献
8.
9.
10.