High Molar Extinction Coefficient Ru(II)-Mixed Ligand Polypyridyl Complexes for Dye Sensitized Solar Cell Application

Scheme 1

Synthesis route of mLBD dyes; (i) K₂Cr₂O₇, H₂SO₄/H₂O, 80°C, 10 hours; (ii) MeOH, conc. H₂SO₄, reflux, 6 hours (iii) RuCl₃, EtOH/CHCl₃, reflux under dark, 4 hours; (iv) L1 or L2, DMF reflux, 4 hours; (v) NH₄NCS, reflux, 2 hours, TEA, water, reflux, 48 hours.