Assembly, characterization, and electrochemical properties of immobilized metal bipyridyl complexes on silicon(111) surfaces

Judith R C Lattimer, James D. Blakemore, Wesley Sattler, Sheraz Gul, Ruchira Chatterjee, Vittal K. Yachandra, Junko Yano, Bruce S. Brunschwig, Nathan S Lewis, Harry B. Gray

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Silicon(111) surfaces have been functionalized with mixed monolayers consisting of submonolayer coverages of immobilized 4-vinyl-2,2′-bipyridyl (1, vbpy) moieties, with the remaining atop sites of the silicon surface passivated by methyl groups. As the immobilized bipyridyl ligands bind transition metal ions, metal complexes can be assembled on the silicon surface. X-ray photoelectron spectroscopy (XPS) demonstrates that bipyridyl complexes of [Cp∗Rh], [Cp∗Ir], and [Ru(acac)2] were formed on the surface (Cp∗ is pentamethylcyclopentadienyl, acac is acetylacetonate). For the surface prepared with Ir, X-ray absorption spectroscopy at the Ir LIII edge showed an edge energy as well as post-edge features that were essentially identical with those observed on a powder sample of [Cp∗Ir(bpy)Cl]Cl (bpy is 2,2′-bipyridyl). Charge-carrier lifetime measurements confirmed that the silicon surfaces retain their highly favorable photoelectronic properties upon assembly of the metal complexes. Electrochemical data for surfaces prepared on highly doped, n-type Si(111) electrodes showed that the assembled molecular complexes were redox active. However the stability of the molecular complexes on the surfaces was limited to several cycles of voltammetry.

Original languageEnglish
Pages (from-to)15004-15012
Number of pages9
JournalDalton Transactions
Volume43
Issue number40
DOIs
Publication statusPublished - Oct 28 2014

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2,2'-Dipyridyl
Coordination Complexes
Silicon
Metal complexes
Electrochemical properties
X-Ray Absorption Spectroscopy
Photoelectron Spectroscopy
Powders
Oxidation-Reduction
Electrodes
Metals
Ions
Ligands
X ray absorption spectroscopy
Carrier lifetime
Voltammetry
Charge carriers
Transition metals
Metal ions
Monolayers

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Medicine(all)

Cite this

Lattimer, J. R. C., Blakemore, J. D., Sattler, W., Gul, S., Chatterjee, R., Yachandra, V. K., ... Gray, H. B. (2014). Assembly, characterization, and electrochemical properties of immobilized metal bipyridyl complexes on silicon(111) surfaces. Dalton Transactions, 43(40), 15004-15012. https://doi.org/10.1039/c4dt01149j

Assembly, characterization, and electrochemical properties of immobilized metal bipyridyl complexes on silicon(111) surfaces. / Lattimer, Judith R C; Blakemore, James D.; Sattler, Wesley; Gul, Sheraz; Chatterjee, Ruchira; Yachandra, Vittal K.; Yano, Junko; Brunschwig, Bruce S.; Lewis, Nathan S; Gray, Harry B.

In: Dalton Transactions, Vol. 43, No. 40, 28.10.2014, p. 15004-15012.

Research output: Contribution to journalArticle

Lattimer, JRC, Blakemore, JD, Sattler, W, Gul, S, Chatterjee, R, Yachandra, VK, Yano, J, Brunschwig, BS, Lewis, NS & Gray, HB 2014, 'Assembly, characterization, and electrochemical properties of immobilized metal bipyridyl complexes on silicon(111) surfaces', Dalton Transactions, vol. 43, no. 40, pp. 15004-15012. https://doi.org/10.1039/c4dt01149j
Lattimer, Judith R C ; Blakemore, James D. ; Sattler, Wesley ; Gul, Sheraz ; Chatterjee, Ruchira ; Yachandra, Vittal K. ; Yano, Junko ; Brunschwig, Bruce S. ; Lewis, Nathan S ; Gray, Harry B. / Assembly, characterization, and electrochemical properties of immobilized metal bipyridyl complexes on silicon(111) surfaces. In: Dalton Transactions. 2014 ; Vol. 43, No. 40. pp. 15004-15012.
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