Electron transfer of phenalenyl derivative molecules adsorbed at the graphite electrode/aqueous solution interface
Electron transfer of phenalenyl derivative molecules adsorbed at the graphite electrode/aqueous solution interface
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石墨电极/水溶液界面吸附的苯酚衍生物分子的电子转移
DOI：
10.1016/j.carbon.2013.06.071
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发表时间：
2013
期刊：
影响因子：
10.9
通讯作者：
Ken-ichi Fukui
中科院分区：
文献类型：
--
作者：
Toru Utsunomiya;Yasuyuki Yokota;Toshiaki Enoki;Yasukazu Hirao;Takashi Kubo;Ken-ichi Fukui
利用循环伏安法（CV）在电解质水溶液中对1，2-双（非那烯-1-亚基）乙烯的二苯基衍生物（Ph 2-BPLE）和s-引达省二苯那烯的四丁基衍生物（TTB-IDPL）在高取向热解石墨（HOPG）电极上的电化学行为进行了表征。在HOPG基平面电极的双层区出现稳定的吸附型氧化还原峰，表明氧化还原峰来自分子。发现在液相中没有任何额外的氧化还原活性分子的情况下，在阳极电位扫描高达+1.4V（相对于RHE）之后，CV曲线的峰面积（氧化还原活性吸附物的量）明显增加。定量分析表明，这是由于潜在的诱导分散的phenalenyl衍生物的分子在电极上，有效的电子转移只发生从分子直接连接到电极表面。
The phenalenyl derivative molecules, diphenyl derivatives of 1,2-bis-(phenalen-1-ylidene) ethene (Ph2-BPLE) and tetrat-butyl derivatives ofs-indacenodiphenalene (TTB-IDPL), casted on a highly oriented pyrolytic graphite (HOPG) electrode, were characterized by using cyclic voltammetry (CV) in aqueous electrolyte solution. Stable and adsorption type redox peaks at the double-layer region of a HOPG basal plane electrode revealed that the redox peaks originated from the molecules. It was found that the peak area of the CV curve, the amount of redox-active adsorbates, apparently increased after anodic potential scans up to +1.4 V vs. RHE without any additional redox-active molecules in the liquid phase. Quantitative analyses indicated that it was due to potential-induced dispersion of the phenalenyl derivative molecules on the electrode, and effective electron transfer occurred only from the molecule directly attached to the electrode surface.