Evidence of click and coordination reactions on a self-assembled monolayer by synchrotron radiation based XPS and NEXAFS
► Ethynyl terpyridines were clicked to azide-terminated SAMs on gold. ► Azides and clicked terpyridines were characterized by N and C K-NEXAFS and N 1s XPS. ► S 1s+S 2p XPS was used to characterize the buried gold–sulfur interface of the SAM. ► Higher click reaction temperature leads to an increased...
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Veröffentlicht in: | Journal of electron spectroscopy and related phenomena 2012-04, Vol.185 (3-4), p.85-89 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | ► Ethynyl terpyridines were clicked to azide-terminated SAMs on gold. ► Azides and clicked terpyridines were characterized by N and C K-NEXAFS and N 1s XPS. ► S 1s+S 2p XPS was used to characterize the buried gold–sulfur interface of the SAM. ► Higher click reaction temperature leads to an increased amount of terpyridyl groups. ► Introduced terpyridyl groups are accessible for Pd(II) ion coordination.
An ethynylterpyridine was “clicked” to an azide-terminated self-assembled monolayer on gold and characterized by synchrotron radiation based surface analysis as NEXAFS and XPS. The detection of azide and terpyridine signatures confirmed a partial click reaction at room temperature. The absence of the azides after reaction at 50°C indicates an almost complete conversion. For the latter case successful Pd(II) coordination has been proven. The Au–S interface of the SAMs has been characterized by S 1s and S 2p XPS. |
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ISSN: | 0368-2048 1873-2526 |
DOI: | 10.1016/j.elspec.2012.02.004 |