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231224s2013 xx |||||o 00| ||eng c |
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|a 10.1021/la304159c
|2 doi
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|a eng
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| 100 |
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|a Kim, Kwan
|e verfasserin
|4 aut
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|a Photoreduction of 4,4'-dimercaptoazobenzene on ag revealed by Raman scattering spectroscopy
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|c 2013
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 14.06.2013
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|a Date Revised 08.01.2013
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a The surface-enhanced Raman scattering (SERS) of 4,4'-dimercaptoazobenzene (4,4'-DMAB) has recently seen a surge of interest, since it might be possible to form 4,4'-DMAB from 4-aminobenzenethiol (4-ABT) via a surface-induced photoreaction. We found in this study, however, that the reverse conversion of 4,4'-DMAB to 4-ABT on Ag is a more feasible process upon irradiation with a 514.5 nm (not 632.8 nm) laser under ambient conditions. First of all, the SERS spectral pattern of 4,4'-DMAB on Ag varied as a function of laser irradiation time, finally becoming the same as that of 4-ABT on Ag. Second, the coupling reaction with 4-cyanobenzoic acid to form amide bonds proceeded readily like 4-ABT once 4,4'-DMAB on Ag was exposed to 514.5 nm radiation. Third, the growth of a calcite crystal occurred on 4,4'-DMAB on Ag, also likely on 4-ABT, when it was exposed to 514.5 nm radiation beforehand. All of these results led us to conclude that the appearance of the so-called b(2)-type bands in the SERS of 4-ABT must be due to the involvement of the chemical enhancement mechanism, not due to the formation of 4,4'-DMAB
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|a Journal Article
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1 |
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|a Kim, Kyung Lock
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Shin, Kuan Soo
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1985
|g 29(2013), 1 vom: 08. Jan., Seite 183-90
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|x 1520-5827
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|g volume:29
|g year:2013
|g number:1
|g day:08
|g month:01
|g pages:183-90
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|u http://dx.doi.org/10.1021/la304159c
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