Issue 16, 2012
From the journal:

Analyst

Selective detection of aqueous nitrite ions by surface-enhanced Raman scattering of 4-aminobenzenethiol on Au

Kwan Kim,*a   Kyung Lock Kima  and  Kuan Soo Shin*b  

* Corresponding authors

a Department of Chemistry, Seoul National University, Seoul 151-742, Korea
E-mail: kwankim@snu.ac.kr
Fax: +82-2-8891568
Tel: +82-2-8806651

b Department of Chemistry, Soongsil University, Seoul 156-743, Korea
E-mail: kshin@ssu.ac.kr
Fax: +82-2-8144076
Tel: +82-2-8200436

Abstract

In this work, we have devised a selective nitrite-ion detection method based on the surface-enhanced Raman scattering (SERS) of 4-aminobenzenethiol (4-ABT) on Au. This is possible because, firstly, SERS is a very surface-sensitive technique with monolayer detection capability, and secondly, the amine group of 4-ABT reacts readily with nitrites in acidic media, forming a diazonium group, which can subsequently form an azo bond by reacting with a variety of benzene derivatives. From the peak intensity of the diazonium group, the presence of nitrite ions above 20 μM can be identified readily. From the peak intensity of the azo moiety alone, it is even possible to detect nitrite ions at concentrations as low as 5 μM, without interference from other anions. This work clearly illustrates the usefulness of SERS in environmental science research.

Graphical abstract: Selective detection of aqueous nitrite ions by surface-enhanced Raman scattering of 4-aminobenzenethiol on Au

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Article information

DOI
https://doi.org/10.1039/C2AN35066A
Article type
Paper
Submitted
13 Jan 2012
Accepted
11 Jun 2012
First published
28 Jun 2012

Analyst, 2012,137, 3836-3840

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Selective detection of aqueous nitrite ions by surface-enhanced Raman scattering of 4-aminobenzenethiol on Au

K. Kim, K. L. Kim and K. S. Shin, Analyst, 2012, 137, 3836 DOI: 10.1039/C2AN35066A

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