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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 37, Number 8
JKCSEZ 37(8)
April 20, 1993 

Electrochemical Reduction of Thionyl Chloride by Tetradentate Schiff Base Transition Metal(Ⅱ) Complexes : Catalytic Effects

네자리 Schiff Base 전이금속(Ⅱ) 착물들에 의한 SOCl2의 전기화학적 환원 : 촉매 효과
Woo-Seong Kim, Yong-Kook Choi, Chan-Young Kim, Ki-Hyung Chjo, Jong-Soon Kim

김우성, 최용국, 김찬영, 조기형, 김종순
이핵성 네자리 schiff base Co(Ⅱ), Ni(Ⅱ), Cu(Ⅱ) alc Fe(Ⅱ) 착물들을 촉매로 사용하여 몰리브데늄 전극과 유리질 탄소 전극에서 SOCl2의 전기화학적 환원반응을 조사하였다. 이들 전이금속(Ⅱ) 착물들은 먼저 전극 표면에 흡착된 후 촉매로 작용하였으며, 각각의 전이금속(Ⅱ) 착물들의 촉매 화합물은 SOCl2를 환원시킬 수 있는 최적 조건의 농도를 나타냈다. SOCl2의 환원반응에 대한 촉매 효과는 몰리브데늄 전극에서보다 유리질 탄소전극에서 더 크게 나타났고, 환원 전류는 최고 120% 정도 증가하였다. 주사속도 증가에 따른 SOCl2의 환원 전류는 증가하였고 환원 전위는 음전위쪽으로 이동되었으며, SOCl2의 환원과정은 확산지배적인 반응으로 진행되었다.

Electrochemical reduction of thionyl chloride has been carried out at glassy carbon and molybdenum electrodes, the surface of which is modified by binuclear tetradentate schiff base Co(Ⅱ), Ni(Ⅱ),Cu(Ⅱ) and Fe(Ⅱ) complexes. The catalyst molecules of transition metal(Ⅱ) complexes were adsorbed on the electrode surface and reduced thionyl chloride resulting in a generation of oxidized catalyst molecules. There was an optimum concentration for each catalyst compound. The catalytic effects of SOCl2 reduction were larger on glassy carbon electrodes compared to molybdenum electrodes and enhancements in reduction current of up to 120% at the glassy carbon electrodes. The reduction currents of thionyl chloride were increased and the reduction potentials were shifted to the negative potential when scan rates became faster. The reduction of thionyl chloride was proceed to diffusion controlled reaction.

702 - 710
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