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Two cyclometalated ruthenium complexes 2[1] and 4 containing a redox-active amine substituent and three carboxylic acid groups were synthesized,where the ruthenium ion and the amine site was separated by a phenyl or biphenyl bridge for 2 and 4,respectively.Nanocrystalline TiO2 films on FTO/glass substrates anchored with 2 or 4 were prepared.