论文部分内容阅读
本文报道KCl引起的银胶中水杨酸(C_7H_4O_3)表面增强喇曼散射谱(SERS)的异常变化。发现KCl造成水杨酸分子中某些结构的SERS强度急剧而迅速下降,但同时又造成3436cm~(-1)附近v(—OH)振动的SERS信号的进一步增强。还研究了KCl对一系列含—COOH结构的分子(例如苯甲酸、对氨基苯甲酸等)SERS信号的影响,发现Cl~-对v(—COO~-)振动的SERS强度有明显的减弱作用。与吡啶的情况作了比较,并对这些现象作了分析。相应的电子显微镜和紫外—可见光吸收实验也表现出了一致性。
This paper reports the abnormal changes of surface enhanced Raman scattering spectra (SERS) of salicylic acid (C_7H_4O_3) induced by KCl. It was found that the SERS intensity of some structures in salicylic acid molecules decreased sharply and rapidly by KCl, but at the same time, the SERS intensity of v (-OH) vibration near 3436 cm -1 was further enhanced. The effect of KCl on the SERS signal of a series of molecules with -COOH structure (eg, benzoic acid, p-aminobenzoic acid) was also studied. It was found that the SERS intensity of Cl ~ - for V (-COO ~ -) vibration significantly attenuated . Compared with the case of pyridine, and the analysis of these phenomena. Corresponding electron microscopy and UV-Vis absorption experiments also showed consistency.