摘要
本文研究了吡啶、苯甲酸共吸附在Ag溶胶表面上的SERS谱,发现吡啶、苯甲酸加入顺序的不同对体系的SERS谱的影响不大,且苯甲酸的SERS谱相对强度大于吡啶的相对强度,说明苯甲酸的吸附能力强于吡啶。SERS谱中吡啶的环呼吸振动谱带从正常拉曼谱中的991cm^(-1)位移至1008cm^(-1),并且少量加入苯甲酸对环呼吸振动有进一步的影响,据此定性地讨论了吡啶的吸附取向。
The SERS spectra of pyridine and benzoic acid coexistent system on Ag sol were presented. There was almost no effect on the SERS spectrum of pyridine and benzoic acid coexistent system when pyridine and benzoic acid were added into Ag sol in different orders, and the relative intensity of SERS bands of benzoic acid was stronger than that of pyridine, which indicated that the adsorption ability of benzoic acid on Ag sol was stronger than that of pyridine. The ring breathing vibration of pyridine showed a frequence shift from 991 cm^(-1) (NR) to 1008 cm^(-1) (SERS) and exhibited a further shift in SERS spectra when a small amount of benzoic acid was added. Based upon these facts, the adsorption orientation of pyridine on Ag sol has been discussed.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
1991年第3期11-14,共4页
Spectroscopy and Spectral Analysis
