Reversible light-dependent molecular switches on Ag/AgCl nanostructures
Song W, Querebillo CJ, Goetz R, Katz S, Kuhlmann U, Gernert U, Weidinger IM, Hildebrandt P (2017)
Publication Type: Journal article
Publication year: 2017
Journal
Book Volume: 9
Pages Range: 8380-8387
Journal Issue: 24
DOI: 10.1039/c7nr02760e
Abstract
Nanostructured Ag/AgCl substrates were used to generate reversible and highly efficient light-dependent chemical switches based on adsorbed 4,4′-dimercaptoazobenzene (DMAB). DMAB was formed in situ via laser-induced dimerization either from 4-nitrothiophenol (4-NTP) or 4-aminothiophenol (4-ATP). The subsequent reaction pathways of DMAB, however, were quite different as monitored by surface enhanced Raman spectroscopy. In the 4-NTP/DMAB system, AgCl catalyses the reversal of the dimerization. Conversely, irradiation of adsorbed 4-ATP first generated cis-DMAB attached to the surface via two Ag-S bonds, followed by AgCl-catalysed cleavage of one Ag-S bond and cis → trans photoisomerisation of DMAB. In the dark, the trans-isomer thermally reverts to cis-DMAB. The here presented light-dark chemical switches, which work without changing other parameters (e.g., pH, anaerobic vs. aerobic), are based on the (photo)catalytic properties of the Ag/AgCl substrate and do not function on pure metal surfaces.
Involved external institutions
Germany (DE)How to cite
APA:
Song, W., Querebillo, C.J., Goetz, R., Katz, S., Kuhlmann, U., Gernert, U.,... Hildebrandt, P. (2017). Reversible light-dependent molecular switches on Ag/AgCl nanostructures. Nanoscale, 9(24), 8380-8387. https://doi.org/10.1039/c7nr02760e
MLA:
Song, W., et al. "Reversible light-dependent molecular switches on Ag/AgCl nanostructures." Nanoscale 9.24 (2017): 8380-8387.
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