Electrochemical and in situ UV-vis spectroelectrochemical studies on a new photosynthesis reaction centre model compound: benzoporphyrin– anthraquinone compound
✍ Scribed by Hao-Ran Sun; Yun-Xin Yang; Guo-Fa Liu; Xi-Zhang Cao
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 89 KB
- Volume
- 03
- Category
- Article
- ISSN
- 1088-4246
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✦ Synopsis
The redox behaviour of a new covalently linked benzoporphyrin–anthraquinone compound ( ZnBPAQ ) was investigated by cyclic voltammetry and in situ UV-vis spectroelectrochemistry in N,N-dimethylformamide solution. Three redox waves of this compound were found in the available potential range. The first oxidation process occurs on the benzoporphyrin ring at 0.570 V and is a quasi-revisible diffusion-controlled one-electron electrode reaction. The first reduction process is also a quasi-reversible diffusion-controlled one-electron electrode reaction and occurs at –0.950 V on the anthraquinone moiety. However, the second reduction process occurs at –1.410 V and involves an overlap of the first reduction of the benzoporphyrin ring and the second reduction of the anthraquinone moiety. The in situ UV-vis spectroelectrochemical results affirm the above conclusions.