Bottom-up assembly of multicomponent coordination-based oligomers

Prakash Chandra Mondal, Jeyachandran Yekkoni Lakshmanan, Hicham Hamoudi, Michael Zharnikov, Tarkeshwar Gupta

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Transition metal complexes allow a high degree of molecular design flexibility through symmetry considerations and ligand architecture, which can be explored for the fabrication of ordered multilayer assemblies through bottom-up approach. Here we describe the preparation of such assemblies, viz. multicomponent coordination-based oligomer films on siloxane-based templates by wet-chemical layer-by-layer deposition process. In these films we combined optically rich iron and ruthenium polypyridyl complexes having pendant pyridine groups (so-called metallo-ligands) and a coinage metal (copper or silver) that acted as a linker between the polypyridyl complex moieties. The properties and structural parameters of the primary template and the oligomer films were studied by X-ray photoelectron spectroscopy, near-edge X-ray absorption fine structure spectroscopy, UV-vis spectroscopy, spectroscopic ellipsometry, atomic force microscopy, and contact angle goniometry. A linear increase in the film thickness upon addition of every next layer suggests that the long-range order of the system is determined by the octahedral structure of the metallo-ligand and square-pyramidal/tetrahedral geometry of the coinage metal linker. Spectroscopic data indicate the existence of electronic communication throughout the individual metallo-organic chains.

Original languageEnglish
Pages (from-to)16398-16404
Number of pages7
JournalJournal of Physical Chemistry C
Volume115
Issue number33
DOIs
Publication statusPublished - 25 Aug 2011
Externally publishedYes

    Fingerprint

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Mondal, P. C., Yekkoni Lakshmanan, J., Hamoudi, H., Zharnikov, M., & Gupta, T. (2011). Bottom-up assembly of multicomponent coordination-based oligomers. Journal of Physical Chemistry C, 115(33), 16398-16404. https://doi.org/10.1021/jp201339p