Reactions between [Au(C6Cl2F3)(tht)] and P,N-donor bridging ligands of the type PPh2py and (PPh2)2phen lead to the homonuclear gold complexes [Au(C6Cl2F3)(PPh2py)] (1) and [Au2(C6Cl2F3)2(PPh2)2phen}] (2). Subsequent addition of [Cu(CH3CN)4](BF4) leads to the formation of the corresponding goldâcopper heterometallic complexes [Au2Cu(C6Cl2F3)2(PPh2py)2](BF4) (3) and [Au2Cu(C6Cl2F3)2(PPh2)2phen)}(CH3CN)](BF4) (4). The four complexes have been structurally characterized and are luminescent. The gold precursors show emissions arising from metal-perturbed intraligand transitions. The heterometallic complexes show a red shift of the emissions that is proposed to arise from an admixture of IL (intraligand) and MLCT (metal-to-ligand-charge-transfer) transitions. DFT and TD-DFT calculations agree well with these results.
[Au(C6Cl2F3)(tht)] 与 PPh2py 和 (PPh2)2phen 类型的 P,N-供体桥
配体之间的反应产生同核
金配合物 [Au(C6Cl2F3)(PPh2py)] (1) 和 [Au2( C6Cl2F3)2(PPh2)2phen}] (2)。随后添加 [Cu(CH3CN)4](
BF4) 导致形成相应的
金铜异
金属配合物 [Au2Cu(C6Cl2F3)2(PPh2py)2]( ) (3) 和 [Au2Cu(C6Cl2F3)2 (PPh2)2phen)}(CH3CN)]( ) (4)。这四种配合物已被结构表征并且具有发光性。
金前驱体显示出由
金属扰动的
配体内转变产生的发射。异
金属配合物显示出发射的红移,这被认为是由 IL(
配体内)和 MLCT(
金属到
配体电荷转移)跃迁的混合引起的。 DFT 和 TD-DFT 计算与这些结果非常吻合。