Development of Redox-Active Optical Mesostructures at Chemically Modified Electrode Interfaces

Ying Wu, Brian W. Pfennig, Andrew Bruce Bocarsly, Edward P. Vicenzi

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37 Scopus citations

Abstract

Polymeric films of [FeII(CN)6-PtIV(NH3)4]n were prepared on optically transparent indium tin oxide (ITO) electrode surfaces via oxidative polymerization of the monomer [Pt(NH3)4]2[(NC)5Fe-CN-Pt(NH3)4-NC-Fe(CN)5]. Irradiation at 457 nm into the intervalence charge transfer band of the interfacial polymer causes the cleavage of bridging -CN- to Pt bonds, leading to the dissociation of polymeric film into shorter-chain [Fe-Pt]n oligomers, [Pt(NH3)4]2+ and [Fe(CN)6]3−. When photolysis is carried out with the modified interface immersed in an aqueous solution containing transition metal cations Mn+ (Mn+ = Ni2+, Fe2+, Mn2+, Cr3+), Mn+ reacts with photogenerated [Fe(CN)6]3− complexes to form mixed metal cyanometalates of the form [M-NC-Fe(CN)5]2− on the electrode surface. As a result, Mn+ is incorporated into the interfacial lattice only at the irradiated regions. The film after Mn+ incorporation is different in color compared to the original [Fe-Pt]n polymer film. Images may be developed on such a film by irradiating the sample through a mask. In this paper we report the formation and characterization of such multicomponent electrode surfaces. In addition, the potential applicability of these multicomponent electrodes as molecular electronic devices is discussed.

Original languageEnglish (US)
Pages (from-to)4262-4267
Number of pages6
JournalInorganic Chemistry
Volume34
Issue number16
DOIs
StatePublished - Aug 1 1995

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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