Abstract Ru(II)-polypyridine complexes of the general formula [Ru(L1/L2)(phen)2]X2 (1a–6a) and [Ru(L1/L2)(bipy)2]X2 (1b–6b) (where X = ClO4, BF4, PF6; phen = 1,10-phenanthroline, bipy = 2,2′-bipyridine) were prepared by the reaction of [Ru(phen)2Cl2]·2H2O and [Ru(bipy)2Cl2]·2H2O with (E)-5-((4-methoxyphenyl)ethynyl)-N-(pyridin-2-ylmethylene)pyridin-2-amine (L1) and (E)-5-((4-nitrophenyl)ethynyl)-N-(pyridin-2-ylmethylene)pyridine-2-amine (L2) in the presence of NaBF4, NaClO4, and NaPF6. The electrochemical properties of all the complexes indicate reversible redox behavior corresponding to Ru(II)–Ru(III) couple and are susceptible to variation of electron-donating/accepting properties of substituent group on L1 and L2. All complexes showed room temperature luminescence corresponding to π→π* intra-ligand charge-transfer (ILCT) transition with chelation enhanced fluorescence and is finely tuned by increasing π-conjugation, size of counter anions, and variation of substituent group with different electronic effects in the complexes. All the complexes worked as an effective catalyst for the oxidation of benzyl alcohol to corresponding benzaldehyde in good yield at room temperature. Graphical Abstract

中文翻译：

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Ru(II)-多吡啶与炔基席夫碱配体的配合物：π-共轭、供体/受体取代基和抗衡阴离子对电化学、发光和催化性能的影响

具有通式 [Ru(L1/L2)(phen)2]X2 (1a–6a) 和 [Ru(L1/L2)(bipy)2]X2 (1b–6b) (其中 X = ClO4, BF4, PF6; phen = 1,10-菲咯啉，bipy = 2,2'-联吡啶）是通过 [Ru(phen)2Cl2]·2H2O 和 [Ru(bipy)2Cl2]·的反应制备的2H2O 与 (E)-5-((4-甲氧基苯基) 乙炔基)-N-(吡啶-2-基亚甲基)吡啶-2-胺 (L1) 和 (E)-5-((4-硝基苯基)乙炔基)- N-(pyridin-2-ylmethylene)pyridine-2-amine (L2) 在 NaBF4、NaClO4 和 NaPF6 存在下。所有配合物的电化学性质表明对应于 Ru(II)-Ru(III) 对的可逆氧化还原行为，并且容易受到 L1 和 L2 上取代基的给电子/接受性质的变化的影响。所有配合物均显示室温发光，对应于具有螯合增强荧光的 π→π* 配体内电荷转移 (ILCT) 跃迁，并通过增加 π 共轭、抗衡阴离子的大小和具有不同电子效应的取代基变化进行微调在复合体中。所有配合物均作为一种有效的催化剂，在室温下以良好的收率将苯甲醇氧化成相应的苯甲醛。图形概要