Surface-plasmon-induced azo coupling reaction between nitro compounds on dendritic silver monitored by surface-enhanced Raman spectroscopy. Issue 17 (7th February 2017)

• Record Type: Journal Article
• Authors: Cho, Feng-Hsuan; Kuo, Shan-Chi; Lai, Ying-Huang
• Is Part Of: RSC advances. Volume 7:Issue 17(2017)
• Page Start: 10259
• Page End: 10265
• Publication Date: 2017-02-07
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra00374a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Azo coupling reactions with a 4-NTP-functionalized Ag-Ds/GCE composites. Abstract : Silver dendrites (Ag-Ds) were prepared by electrodeposition on a glassy carbon electrode (GCE) from a silver(i ) sulfate solution containing cysteine. The dendritic Ag surface showed high Raman enhancement, enabling the detection of analytes from dilute solution by surface-enhanced Raman scattering (SERS). 4-Nitrothiophenol (4-NTP) was used as the probe molecule to examine the analyte-concentrating ability and SERS activity of Ag-Ds/GCE composite. The results indicate that the Ag-Ds/GCE composite exhibits a prominent SERS effect. The lowest 4-NTP detection limit obtained was 5.0 × 10 −9 M. We used a 4-NTP-functionalized Ag-Ds as an analytic and catalytic platform for chemical reactions involving the conversion of 4-NTP to p-p ′-dimercaptoazobenzene and azo coupling of 4-nitrobenzo-15-crown-5 to 4, 4′-mercaptoazobenzene-15-crown-5-ether.