Surface-enhanced Raman scattering of 4-nitrothioanisole in Ag sol
Surface-enhanced Raman scattering of 4-nitrothioanisole in Ag sol
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DOI：
10.1021/jp047609x
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发表时间：
2004-10-14
影响因子：
3.3
通讯作者：
Kim, KL
中科院分区：
文献类型：
--
作者：
Kim, K;Lee, SJ;Kim, KL
研究了4-硝基硫代苯甲醚(4-NTA)在银溶胶中的表面增强拉曼散射(SERS)。发现该分子通过硫原子以4-NTA形式吸附在银表面。然而，在514.5 nm的Ar离子激光照射下，该分子经历了两个连续的表面诱导光反应，即C-S键断裂和硝基转化为胺。相应地，4-NTA的SERS谱与吸附在银表面的4-氨基苯硫酸酯的SERS谱相同。4-NTA在银电极上的电化学分析结合在浓硼氢化钠中的表面增强拉曼光谱测量也表明，C-S键的断裂发生在硝基转化为胺之前。
Surface-enhanced Raman scattering (SERS) of 4-nitrothioanisole (4-NTA) is investigated in Ag sol. The molecule is found to adsorb on Ag as 4-NTA via the sulfur atom. Upon irradiation by an argon ion laser at 514.5 nm, the molecule is, however, subjected to two consecutive surface-induced photoreactions, namely C-S bond scission followed by nitro to amine conversion. Accordingly, the SERS spectrum of 4-NTA becomes the same as that of 4-aminobenzenthiolate adsorbed on Ag. Electrochemical analyses of 4-NTA at the Ag electrode combined with SERS measurements in Concentrated sodium borohydride also suggest that the C-S bond scission takes place prior to the nitro to amine conversion.