New Ru(<scp>ii</scp>) photocages operative with near-IR light: new platform for drug delivery in the PDT window
作者:Malik H. Al-Afyouni、Thomas N. Rohrabaugh、Kathlyn F. Al-Afyouni、Claudia Turro
DOI:10.1039/c8sc02094a
日期:——
A series of Ru(II) complexes bearing the tridentate 2,6-di(quinolin-2-yl)pyridine (dqpy) ligand were designed to undergo photoinduced ligand dissociation with red/near-IR light. The complexes [Ru(dqpy)(L)(CH3CN)]2+, where L = 2,2′-bipyridine (bpy, 1), 4,4′dimethyl-2,2′-bipyridine (Me2bpy, 2), and 1,10-phenanthroline (phen, 3). Complexes 1–3 exhibit red-shifted lowest energy metal-to-ligand charge transfer
设计了一系列带有三齿 2,6-二(喹啉-2-基)吡啶 (dqpy) 配体的 Ru( II ) 配合物,可通过红光/近红外光进行光诱导配体解离。配合物 [Ru(dqpy)(L)(CH 3 CN)] 2+ ,其中 L = 2,2'-联吡啶 (bpy, 1 )、4,4'二甲基-2,2'-联吡啶 (Me 2 bpy , 2 ) 和 1,10-菲咯啉 (phen, 3 )。与相应的 tpy (2,2';6',2''-三联吡啶) 配合物相比,配合物1-3在 ~600 nm 处表现出红移的最低能量金属到配体电荷转移 (MLCT) 吸收最大值~565 nm 处的 MLCT 谱带呈现为 ~455 nm 处 MLCT 谱带的肩部。这种转变归因于与 tpy 相比,dqpy 配体提供的 LUMO 能量较低,这一点可以通过第一个还原波转变为前者的正电势约 0.3 V 来证明。此外,在 770 nm 处观察到 [Ru(dqpy)(acac)(CH