Design of C^N^N type ligands and their Ir(III)-complexes to prevent deterioration pathways during the photocatalytic water reduction.

设计 C^N^N 型配体及其 Ir(III) 配合物，以防止光催化减水过程中的劣化途径。

• 批准号: 81098486
• 负责人: Dr. Johanna Hummel
• 金额: --
• 依托单位: Department of Chemistry
• 依托单位国家: 德国
• 项目类别: Research Fellowships
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2008-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/81098486?language=en
• 关键词: Design; type; ligands; their; Ir

As a result of the diminishing resources of the earth, the conversion of sunlight into usable forms of energy is of increasing interest. Transition metal complexes can be used in systems capable of the photoinduced catalytic generation of molecular Hydrogen from water. Iridium(III)-complexes function as efficient photosensitizers in such systems due to their photophysical properties that can be easily tuned by variation of the ligands and their substitution pattern. A major problem using Ir(III)- complexes in photocatalytic water reduction is ligand dissociation, more precisely, the dissociation of a bipyridine unit in [Ir(ppy)2bpy]PF6, resulting in a decrease of the hydrogen production over a period of time. To avoid this deterioration pathway, C^N^N-ligands will be utilized.

由于地球资源不断减少，将阳光转化为可用能源形式越来越受到人们的关注。过渡金属配合物可用于能够从水中光诱导催化生成分子氢的系统中。铱(III)络合物在此类系统中充当有效的光敏剂，因为它们的光物理性质可以通过配体及其取代模式的变化轻松调节。在光催化水还原中使用Ir(III)-配合物的一个主要问题是配体解离，更准确地说，是[Ir(ppy)2bpy]PF6中联吡啶单元的解离，导致一段时间内氢气产量的减少。为了避免这种恶化途径，将使用 C^N^N-配体。