published in Advance ACS Abstracts, July 1. 1995. Wriehton, M. S. Science 1986, 231, 32-37. Chizsey, C. E.; Murray, R. W. Science 1986, 231, 25-31. Murray, R. W.; Ewing, A. G.: Durst, R. A. Anal. Chem. 1987, 59, 319A-399A. Natan. M. J.; Wrighton, M. S . f rog . Inorg. Chem. 1989, 37. 391494. Ryan. M. D.; Bowden, E. F.: Chambers, J. Q. Anal. Chem. 1994,66, 360R-427R. Gould, S.: Gray, K. H.: Linton. R. W.; Meyer, T. J. Inorg. Chem. 1992. S I , 5521-5525. Callomb-Dunand-Sauthier, M.-N.; Doronzier, A,; Ziessel. R. J . Phys. Chem. 1993, 97, 5913-5979. Gould, S.: O'Toole, T. R.; Meyer. T. J. J. Am. Chem. SOC. 1990, 112, 9490-9496. [P~(NH~)~]~[(NC)SF~-CN-P~(NH~)~-NC-F~(CN)~] (A)? where there exists a photoinduced (A,,, = 424 nm) intervalence charge transfer (IT) process that is two-electron in nature and involves all three metal centers.'O In addition, this complex readily undergoes oxidative polymerization on a variety of electrode surfaces. For the purpose of fabricating optical devices, the transparent indium tin oxide (ITO) electrode is most suitable. The oxidative polymerization mechanism is outlined as follows (ligands are omitted for clarity). Ptll 2[Fe-Pdv],, [Ox] 2[Fe'-Pt'v], [Fe-Pt'V]2n-, (2) Bridging from the cyanide ligands to the Pt centers may take place in one, two, or three dimensions due to the octahedral geometry of the complex. This gives rise to one-dimensional, sheet, and network polymer systems. The previously mentioned IT transition of the trinuclear monomer results in the simultaneous oxidation of Fe centers from 2+ to 3+ and the reduction of Pt from 4+ to 2+, during which process the linkage of bridging -CNligand to Pt is broken. This photodissociation may be preserved in polymer films generated at strategically chosen derivatizing potentials. Based on known photochemistry of the monomer,l0 it is reasonable to assume the following. [Fe-Ptlv]z,+, hv 2[Fe'-Pt'vl,, + [Pt(NH3)J2+ (3) I1 Y [Fe-Pt'v],, n[Fe(CN),I3+ n[Pt(NH,),]'+ (4) The procedures used to generate multicomponent electrode surfaces are illustrated in Scheme 1. The [Fe-Pt], polymer film is first laid down on an IT0 surface electrochemically and (9) Pfennig. B. W.: Bocarsly. A. B. Coord. Chem. Rev. 1991. 1 1 1 , 91( I O ) Pfennig. B. W.; Bocarsly. A. B. J . fhys . Chem. 1992. 96, 226-233. 96. 0020-1 66919511 334-4262$09.00/0