Department of Applied Chemistry, Graduate Course of Urban Environmental Sciences, Tokyo Metropolitan University, Minami-ohsawa 1-1, Hachiohji, Tokyo 192-0397 Japan.
J Am Chem Soc. 2011 Sep 14;133(36):14280-6. doi: 10.1021/ja204425u. Epub 2011 Aug 17.
The quantitative excited energy transfer reaction between cationic porphyrins on an anionic clay surface was successfully achieved. The efficiency reached up to ca. 100% owing to the "Size-Matching Rule" as described in the text. It was revealed that the important factors for the efficient energy transfer reaction are (i) suppression of the self-quenching between adjacent dyes, and (ii) suppression of the segregated adsorption structure of two kinds of dyes on the clay surface. By examining many different kinds of porphyrins, we found that tetrakis(1-methylpyridinium-3-yl) porphyrin (m-TMPyP) and tetrakis(1-methylpyridinium-4-yl) porphyrin (p-TMPyP) are the suitable porphyrins to accomplish a quantitative energy transfer reaction. These findings indicate that the clay/porphyrin complexes are promising and prospective candidates to be used for construction of an efficient artificial light-harvesting system.
在阴离子粘土表面上，阳离子卟啉之间的定量激发能量转移反应得以成功实现。由于文中所述的“尺寸匹配规则”，效率达到了约 100%。结果表明，高效能量转移反应的重要因素是（i）抑制相邻染料之间的自猝灭，以及（ii）抑制两种染料在粘土表面上的分离吸附结构。通过检查许多不同种类的卟啉，我们发现四（1-甲基吡啶-3-基）卟啉（m-TMPyP）和四（1-甲基吡啶-4-基）卟啉（p-TMPyP）是实现定量能量转移反应的合适卟啉。这些发现表明粘土/卟啉复合物是很有前途和有潜力的候选物，可用于构建高效的人工光捕获系统。
