Five new heteroleptic copper(I) complexes (C1-5) of the type [Cu(dpa)(P,P)]BF₄ based on dipyridylamine (dpa) as N,N ligand and commercial diphosphines as P,P ancillary ligands have been synthesised through a simple methodology with high yields. All complexes were thoroughly characterised by spectroscopic and spectrometric techniques, as well by theoretical calculations. These showed Metal to Ligand Charge Transfer (MLCT) absorptions in the 300–370 nm region, and emission in the 450–520 nm region with quantum yields and lifetimes that depend on the nature of the P,P ligand. The photocatalytic performance of copper(I) complexes C1-5 was evaluated for their use as photoredox catalysts in ATRA reactions, decarboxylative coupling and an Appel-type reaction. The use of readily available dpa as N,N ligand constitutes an attractive alternative to the well-established phenanthroline ligands typically used in photocatalysis.

中文翻译：

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含 dpa 配体 [Cu(dpa)(P,P)]BF4 的新型杂配铜 (I) 光催化剂系列的磷化氢评价

五种新的 [Cu(dpa)( P,P )]BF ₄型杂配铜 (I) 配合物 ( C1-5 )基于二吡啶胺 (dpa) 作为N , N配体和商业二膦作为P , P辅助配体具有通过简单的方法以高产率合成。所有配合物都通过光谱和光谱技术以及理论计算进行了彻底的表征。这些显示金属到配体电荷转移 (MLCT) 在 300-370 nm 区域的吸收和在 450-520 nm 区域的发射，其量子产率和寿命取决于P、P配体的性质。铜(I)配合物的光催化性能评估了C1-5在 ATRA 反应、脱羧偶联和 Appel 型反应中作为光氧化还原催化剂的用途。使用容易获得的 dpa 作为N , N配体构成了通常用于光催化的完善的菲咯啉配体的有吸引力的替代方案。