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Triptycene-terminated thiolate and selenolate monolayers on Au(111).

ABSTRACT: To study the implications of highly space-demanding organic moieties on the properties of self-assembled monolayers (SAMs), triptycyl thiolates and selenolates with and without methylene spacers on Au(111) surfaces were comprehensively studied using ultra-high vacuum infrared reflection absorption spectroscopy, X-ray photoelectron spectroscopy, near-edge X-ray absorption fine structure spectroscopy and thermal desorption spectroscopy. Due to packing effects, the molecules in all monolayers are substantially tilted. In the presence of a methylene spacer the tilt is slightly less pronounced. The selenolate monolayers exhibit smaller defect densities and therefore are more densely packed than their thiolate analogues. The Se-Au binding energy in the investigated SAMs was found to be higher than the S-Au binding energy.

SUBMITTER: Liu J

PROVIDER: S-EPMC5405688 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature

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Triptycene-terminated thiolate and selenolate monolayers on Au(111).

Liu Jinxuan J Kind Martin M Schüpbach Björn B Käfer Daniel D Winkler Stefanie S Zhang Wenhua W Terfort Andreas A Wöll Christof C

Beilstein journal of nanotechnology 20170420

To study the implications of highly space-demanding organic moieties on the properties of self-assembled monolayers (SAMs), triptycyl thiolates and selenolates with and without methylene spacers on Au(111) surfaces were comprehensively studied using ultra-high vacuum infrared reflection absorption spectroscopy, X-ray photoelectron spectroscopy, near-edge X-ray absorption fine structure spectroscopy and thermal desorption spectroscopy. Due to packing effects, the molecules in all monolayers are s ...[more]

PMID: 28503400

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