Abstract
AbstractFour polypyridyl bridging ligands BL1−4 containing open‐chain crown ether, where BL1−3 formed by the condensation of 4,5‐diazafluoren‐9‐oxime with diethylene glycol di‐p‐tosylate, triethylene glycol di‐p‐tosylate, and tetraethylene glycol di‐p‐tosylate, respectively. BL4 formed by the reaction of 4‐(1,10‐phenanthrolin‐5‐ylimino)methylphenol with triethylene glycol di‐p‐tosylate, have been synthesized. Reaction of Ru(bpy)2Cl2·2H2O with BL, respectively, afforded four bimetallic complexes [(bpy)2RuBL1−4Ru(bpy)2]4+ as [PF6]− salts. Electrochemistry of these complexes is consistent with one RuII‐based oxidation and several ligand‐based reductions. These complexes show metal‐to‐ligand charge transfer absorption at 439‐452 nm and emission at 570‐597 nm.
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