Efficient Charge Injection from the S2 Photoexcited State of Special-Pair Mimic Porphyrin Assemblies Anchored on a Titanium-Modified ITO Anode
作者:Mitsuhiko Morisue、Noriko Haruta、Dipak Kalita、Yoshiaki Kobuke
DOI:10.1002/chem.200600304
日期:2006.10.25
methodology has been accomplished, aimed at efficient anodic photocurrent generation by a photoexcited porphyrin on an ITO (indium-tin oxide) electrode. The ITO electrode was submitted to a surface sol-gel process with titanium n-butoxide in order to deposit a titanium monolayer. Subsequently, porphyrins were assembled as monolayers on the titanium-treated ITO surface via phosphonate, isophthalate, and
已经完成了一种新颖的表面制造方法,旨在通过在ITO(铟锡氧化物)电极上的光激发卟啉来有效地产生阳极光电流。ITO电极用正丁醇钛进行表面溶胶-凝胶处理,以沉积钛单层。随后,卟啉通过膦酸酯基,间苯二甲酸酯基和硫醇酸酯基团组装成钛处理过的ITO表面上的单层。滑面卟啉二聚体,即光反应中心的所谓人工特殊对,是通过咪唑基卟啉酮锌(II)单元的咪唑基与锌的互补配位而组织的,它们通过烯丙基侧链的闭环烯烃复分解共价固定。借助于X射线光电子能谱分析改性的表面。卟啉二聚体的光辐照由于二聚体的重组能小,在含有对苯二酚作为电子牺牲剂的电解质水溶液中产生了较大的阳极光电流。使用不同的连接基团会导致阳极光电流产生效率的显着差异。根据在各种pH值和偏置条件下的光电流特性评估的表观平坦带电势暗示着ITO电极的能带结构被锚固物质所修饰。在Soret能带上通过光激发产生的阳极光电流的量子产率提高到15%,这是一个令人惊讶的高值