Positive constructs

Charges localized on surface-confined organometallic oligomers

Marc Altman, Olena V. Zenkina, Takahiko Ichiki, Mark A. Iron, Guennadi Evmenenko, Pulak Dutta, Milko van der Boom

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Assemblies with molecular-level organization based on organic chromophores and a bimetallic palladium complex are presented. A layer-by-layer strategy is employed by alternately coordinating vinylpyridine-terminated chromophores to the metal centers to form cationic oligomers. These new structures are formed from solution on quartz and silicon substrates functionalized with a covalently bound template layer. Twelve consecutive deposition steps result in structurally regular assemblies as demonstrated by linear increases in the ellipsometrically determined thickness and UV-vis optical absorption. The increase in thickness for each additional layer shows that the long-range order of the system is determined by the structure of the chromophores and by the square-planar geometry of the metal centers. Furthermore, the optical properties indicate that the conjugation length of the assembly component does not increase in the surface-bound oligomers with each additional deposition cycle. Structural communication is transferred via the system components, but they remain electronically isolated. This is supported by density functional theory (DFT) calculations.

Original languageEnglish
Pages (from-to)4676-4684
Number of pages9
JournalChemistry of Materials
Volume21
Issue number19
DOIs
Publication statusPublished - Oct 13 2009

Fingerprint

Organometallics
Chromophores
Oligomers
Metals
Quartz
Palladium
Silicon
Light absorption
Density functional theory
Optical properties
Geometry
Communication
Substrates

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Altman, M., Zenkina, O. V., Ichiki, T., Iron, M. A., Evmenenko, G., Dutta, P., & van der Boom, M. (2009). Positive constructs: Charges localized on surface-confined organometallic oligomers. Chemistry of Materials, 21(19), 4676-4684. https://doi.org/10.1021/cm901789e

Positive constructs : Charges localized on surface-confined organometallic oligomers. / Altman, Marc; Zenkina, Olena V.; Ichiki, Takahiko; Iron, Mark A.; Evmenenko, Guennadi; Dutta, Pulak; van der Boom, Milko.

In: Chemistry of Materials, Vol. 21, No. 19, 13.10.2009, p. 4676-4684.

Research output: Contribution to journalArticle

Altman, M, Zenkina, OV, Ichiki, T, Iron, MA, Evmenenko, G, Dutta, P & van der Boom, M 2009, 'Positive constructs: Charges localized on surface-confined organometallic oligomers', Chemistry of Materials, vol. 21, no. 19, pp. 4676-4684. https://doi.org/10.1021/cm901789e
Altman M, Zenkina OV, Ichiki T, Iron MA, Evmenenko G, Dutta P et al. Positive constructs: Charges localized on surface-confined organometallic oligomers. Chemistry of Materials. 2009 Oct 13;21(19):4676-4684. https://doi.org/10.1021/cm901789e
Altman, Marc ; Zenkina, Olena V. ; Ichiki, Takahiko ; Iron, Mark A. ; Evmenenko, Guennadi ; Dutta, Pulak ; van der Boom, Milko. / Positive constructs : Charges localized on surface-confined organometallic oligomers. In: Chemistry of Materials. 2009 ; Vol. 21, No. 19. pp. 4676-4684.
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