Inorganic Chemistry, Vol.35, No.6, 1737-1739, 1996
Spectroscopic and Electrochemical Properties of a Series of Mixed-Metal D(6),D(8) Bimetallic Complexes of the Form ((bpy)(2)M(BL)Ptcl2)(2+) (Bpy=2,2’-Bipyridine Bl=dpq (2,3-bis(2-Pyridyl)Quinoxaline) or Dpb (2,3-bis(2-Pyridyl)Benzoquinoxaline), M=os-II or Ru-II)
A series of new polymetallic complexes have been prepared which couple d(6) pseudooctahedral light-absorbing centers to a d(8) square planar platinum site. These systems have lowest lying excited states that are M ---> BL charge transfer in nature. Hence, optical excitation directs charge flow toward the coupled platinum site. Synthetic Variation of the light-absorbing metal and the bridging ligand has been quite useful in the interpretation of the spectroscopic and electrochemical properties of these systems.
Keywords:POLYAZINE BRIDGING LIGANDS;TRANSFER EXCITED-STATES;REDOX PROPERTIES;RUTHENIUM(II);OSMIUM(II);PHOTOPHYSICS;TETRAKIS(2;2’-BIPYRIDINE)(MU-2;3-BIS(2-PYRIDYL)PYRAZINE)DIRUTHENIUM(II);2;3-BIS(2-PYRIDYL)PYRAZINE;2;2’-BIPYRIMIDINE;PHOTOCHEMISTRY