Modulation of Acridinium Organophotoredox Catalysts Guided by Photophysical Studies

被引:66
作者
Fischer, Christian [1 ]
Kerzig, Christoph [1 ]
Zilate, Bouthayna [1 ]
Wenger, Oliver S. [1 ]
Sparr, Christof [1 ]
机构
[1] Univ Basel, Dept Chem, CH-4056 Basel, Switzerland
基金
瑞士国家科学基金会;
关键词
acridinium salts; catalyst design; energy transfer; metalation; photoredox catalysis; VISIBLE-LIGHT; DIRECT TRANSFORMATION; PHOTOREDOX CATALYSIS; CHARGE-SHIFT; EOSIN-Y; ENERGY; STATE; ARYL; ESTERS; ION;
D O I
10.1021/acscatal.9b03606
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Control over redox states and spin multiplicity of photo catalysts throughout a catalytic cycle is crucial for selective and efficient photocatalytic processes. However, the rational design of photocatalysts is often hampered by the mechanistic complexity and low modularity of the catalyst structure. Herein, we demonstrate a photophysical study of diverging photocatalytic pathways that guides the design of organic acridinium catalysts to complement polypyridyl transition metal systems. A combined halogen metal exchange/directed ortho-metalation provides reagents for a broad range of modular acridinium catalysts with fine-tuned photophysical and photochemical properties such as excited-state lifetimes, redox potentials, and photostabilities poised to refine organocatalytic photoredox methodology.
引用
收藏
页码:210 / 215
页数:11
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