Some complexes of Cr(III) and Cr(0) have long been known to exhibit interesting photophysical and photochemical properties, but in the past few years important conceptual progress was made. This Perspective focuses on the recent developments of Cr(III) complexes as luminophores and dyes for solar cells, their application in photoredox catalysis, their use as sensitizers in upconversion processes, and their performance as photochemical nitric oxide sources. The example of a luminescent Cr(0) isocyanide complex illustrates the possibility of obtaining photoactive analogues of d⁶ metal complexes that are commonly made from precious metals such as Ru(II) or Ir(III). The studies highlighted herein illustrate the favorable excited-state properties of robust first-row transition metal complexes with broad application potential.

中文翻译：

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用于发光，太阳能电池，光氧化还原催化，上转换和光触发NO释放的铬配合物

早已知道某些Cr（III）和Cr（0）的配合物表现出有趣的光物理和光化学性质，但在过去的几年中取得了重要的概念进展。本观点着眼于Cr（III）配合物作为太阳能电池的发光体和染料的最新进展，它们在光氧化还原催化中的应用，在上转换过程中用作敏化剂以及它们作为光化学一氧化氮源的性能。发光的Cr（0）异氰化物络合物的例子说明了获得d ⁶金属络合物光活性类似物的可能性，这些化合物通常由贵金属如Ru（II）或Ir（III）制成）。本文重点介绍的研究表明了具有广泛应用潜力的稳健的第一行过渡金属配合物的有利激发态性质。