A novel tripodal ligand, tris[(4'-methyl-2,2'-bipyridyl-4-yl)methyl]-carbinol (L), has been synthesized. The spectroscopic, electrochemical, and photocatalytic properties of the new trinuclear complexes (Ru2Re and RuRe2) linked by the tripodal bridging ligand L are then investigated. In addition, 2-fold-improved photocatalytic activities were obtained in the case of these trinuclear complexes compared to the mixtures of the appropriate monometallic model complexes in the reduction of CO2 under visible irradiation.