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Photophysical Activity and Host-Guest Behavior of Ruthenium Polypyridyl Catalysts Encapsulated in Cucurbit[10]uril.
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2020-06-24 , DOI: 10.1021/acs.inorgchem.0c00986
Ena T Luis 1 , Anthony I Day 2 , Burkhard König 3 , Jonathon E Beves 1
Affiliation  

This work outlines a strategy to combine the use of visible light and confined spaces to form a supramolecular photocatalyst system. Polypyridyl ruthenium(II) complexes [Ru(bpy)3]2+ (bpy = 2,2′-bipyridine), [Ru(bpy)2(bpm)]2+ (bpm = 2,2′-bipyrimidine), and [Ru(bpy)2(bpz)]2+ (bpz = 2,2′-bipyrazine) are encapsulated in cucurbit[10]uril to form host–guest systems in aqueous solution. The photophysical properties of the complexes are altered by encapsulation, with improved emissive behavior for the heteroleptic complexes. Oxidative quenching of the photocatalyst’s excited state via intermolecular charge transfer to methyl viologen can occur within the internal cavity, which acts to preorganize the reagents. The host–guest system containing [Ru(bpy)3]2+ can bind suitable substrates, and essential criteria for its use as a supramolecular photocatalyst are investigated.

中文翻译:

包裹在葫芦[10]尿素中的钌多吡啶基催化剂的光物理活性和主客体行为。

这项工作概述了将可见光与有限空间结合使用以形成超分子光催化剂体系的策略。聚吡啶钌(II)络合物[Ru(bpy)3 ] 2+(bpy = 2,2'-联吡啶),[Ru(bpy)2(bpm)] 2+(bpm = 2,2'-联嘧啶)和[Ru(bpy)2(bpz)] 2+(bpz = 2,2'-bipyrazine)被包裹在葫芦[10]尿素中,在水溶液中形成宿主-客体系统。复合物的光物理性质可以通过包封来改变,从而改善了杂配物的发光性能。通过分子间电荷转移到甲基紫精中,光催化剂激发态的氧化猝灭可能在内部空腔中发生,这会导致试剂预组织。包含[Ru(bpy)3 ] 2+的主客体系统可以结合合适的底物,并对其用作超分子光催化剂的基本标准进行了研究。
更新日期:2020-07-06
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