Synthesis, characterization and photophysics of bimetallic manganese(I) and ruthenium(II) complexes

A series of new manganese(I) and ruthenium(II) monometallic and bimetallic complexes made of 2,2′-bipyridine and 1,10-phenanthroline ligands, [Mn(CO)3(NN)(4,4′-bpy)]+, [{(CO)3(NN)Mn}2(4,4′-bpy)]2+ and [(CO)3(NN)Mn(4,4′-bpy)Ru(NN)2Cl]2+ (NN = 2,2′-bipyridine, 1,10-phenanthroline; 4,4′-bpy = 4,4′-bipyridine) are synthesized and characterized, in addition to already known ruthenium(II) complexes [Ru(NN)2Cl(4,4′-bpy)]+ and [Cl(NN)2Ru(4,4′-bpy)Ru(NN)2Cl]2+. The electrochemical properties show that there is a weak interaction between two metal centers in Mn–Ru heterobimetallic complexes. The photophysical behavior of all the complexes is studied. The Mn(I) monometallic and homobimetallic complexes have no detectable emission. In Mn–Ru heterobimetallic complexes, the attachment of Mn(I) with Ru(II) provides interesting photophysical properties.

Graphical abstractA series of new manganese(I) monometallic and bimetallic complexes and manganese(I)–ruthenium(II) heterobimetallic complexes are synthesized and characterized. A weak interaction between two metal centers in Mn–Ru heterobimetallic complexes is observed. The Mn–Ru heterobimetallic complexes, show interesting photophysical properties.Figure optionsDownload full-size imageDownload as PowerPoint slide