描述了一种有效的均相催化系统,用于利用环金属化的铱(III)和tris-2,2'-联吡啶基铑(III)络合物从水中可见光诱导的氢气生产。光敏剂Ir(C--N)2(N--N)(+)和减水催化剂Rh(N--N)3(3+)的合成改性产生了具有多种光物理和电化学性质的催化剂系列。各种催化剂组合和光反应条件的平行筛选可实现优化光催化系统的快速开发,该系统可实现超过5000次的转换,其量子产率((1)/ 2 H 2吸收的每个光子)大于34%。优化系统的光物理和电化学特性表明,还原淬灭途径为形成[Rh(N--N)2](0)提供了必要的驱动力。汞或CS 2对系统中毒的测试提供了有力的证据,表明该系统是用于光催化制氢的真正均质系统。
Accelerated Luminophore Discovery through Combinatorial Synthesis
作者:Michael S. Lowry、William R. Hudson、Robert A. Pascal、Stefan Bernhard
DOI:10.1021/ja047156+
日期:2004.11.1
A method for accelerating the discovery of ionic luminophores using combinatorial techniques is reported. The photophysical properties of the resulting transition-metal-based chromophores were compared against a series of analogous, traditionally prepared species. The strong overlap between these two sets confirms the identity of the parallel synthesis products and supports the truthfulness of the combinatorial results. Further support for the combinatorial method comes from the adherence of these complexes to the energy gap law. The relationship between the structure of a complex and its photophysical properties was also considered, and static DFT calculations were used to assess whether it is feasible to predict the luminescent behavior of novel materials.