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Search: onr:"swepub:oai:DiVA.org:kau-2864" > A spectroscopic stu...

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  • Watcharinyanon, Somsakul,1978-Karlstads universitet,Avdelningen för fysik och elektroteknik,Materialfysik,Karlstad University (author)

A spectroscopic study of self-assembled monolayer of porphyrin-functionalized oligo(phenyleneethynylene)s on gold : the influence of the anchor moiety

  • Article/chapterEnglish2008

Publisher, publication year, extent ...

  • London :RSC Publishing,2008
  • printrdacarrier

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  • LIBRIS-ID:oai:DiVA.org:kau-2864
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-2864URI
  • https://doi.org/10.1039/b802914hDOI
  • https://research.chalmers.se/publication/86247URI

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  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Porphyrin-functionalized oligo(phenyleneethynylene)s (OPE) are promising molecules for molecular electronics applications. Three such molecules (1-3) with the common structure P-OPE-AG (P and AG are a porphyrin and anchor group, respectively) and different anchor groups, viz. an acetyl protected thiol, -S-COCH3 (1), an acetyl protected thiol with methylene linker, -CH2-S-COCH3 (2), and a trimethylsilylethynyl group, -C(triple bond)C-Si(CH3)3 (3) have been synthesized and the corresponding self-assembled monolayers (SAMs) on Au(111) substrates have been prepared. The integrity and structural properties of these films were studied by X-ray photoelectron spectroscopy and near-edge X-ray absorption fine structure spectroscopy. The results suggest that the films formed from 1 have a high orientational order with an almost upright orientation and dense packing of the molecular constituents, i.e. represent a high quality SAM. In contrast, molecule 2 formed disordered molecular layers on Au, even though the molecule-surface bonding (thiolate) is the same as in the case of molecule 1. This suggests that the methylene linker in molecule 2 has a strong impact on the quality of the resulting film, so that a well-ordered SAM cannot be formed. The silane system, 3, is also able to bind to the gold surface but the resulting SAM has a poor quality, being significantly disordered and/or comprised of strongly inclined molecules. The above results suggest that the nature of the anchor group along with a possible linker is an important parameter which, to a high extent, predetermines the entire quality of OPE-based molecular layers

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  • Nilsson, DanielDepartment of Chemical and Biological Engineering, Chalmers University of Technology,Chalmers tekniska högskola,Chalmers University of Technology (author)
  • Moons, Ellen,1966-Karlstads universitet,Avdelningen för fysik och elektroteknik,Materialfysik,Karlstad University(Swepub:kau)ellemoon (author)
  • Shaporenko, AndreyAngewandte Physikalische Chemie, Universität Heidelberg im Neuenheimer Feld 253,Ruprecht-Karls-Universität Heidelberg,Heidelberg University (author)
  • Zharnikov, MichaelAngewandte Physikalische Chemie, Universität Heidelberg im Neuenheimer Feld 253,Ruprecht-Karls-Universität Heidelberg,Heidelberg University (author)
  • Albinsson, Bo,1963Department of Chemical and Biological Engineering, Chalmers University of Technology,Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)balb (author)
  • Mårtensson, Jerker,1965Department of Chemical and Biological Engineering, Chalmers University of Technology,Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)jerker (author)
  • Johansson, Lars S.O.1956-Karlstads universitet,Avdelningen för fysik och elektroteknik,Materialfysik,Karlstad University(Swepub:kau)larsjoh (author)
  • Karlstads universitetAvdelningen för fysik och elektroteknik (creator_code:org_t)

Related titles

  • In:Physical Chemistry, Chemical Physics - PCCPLondon : RSC Publishing10:34, s. 5264-52751463-90761463-9084

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