Diffuse reflectance infrared spectra of 4-nitrobenzoic acid and 4-cyanobenzoic acid self-assembled on fine silver particles

被引：27

作者：

Han, HS

Kim, CH

Kim, K ^{[1
]}

机构：

[1] Seoul Natl Univ, Dept Chem, Seoul 151742, South Korea

[2] Seoul Natl Univ, Ctr Mol Catalysis, Seoul 151742, South Korea

来源：

APPLIED SPECTROSCOPY | 1998年 / 52卷 / 08期

关键词：

infrared; diffuse reflectance; DRIFT; Silver particle; 4-nitrobenzoic acid; 4-cyanobenzoic acid;

D O I：

10.1366/0003702981944931

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Adsorption of 4-nitrobenzoic acid and 4-cyanobenzoic acid on fine silver powders was investigated by diffuse reflectance infrared Fourier transform spectroscopy. It was concluded that both molecules were adsorbed on the surfaces of silver powders as carboxylate, after deprotonation, assuming a perpendicular orientation with respect to the silver surface. In a comparison with the reflection-absorption infrared spectra taken for the same molecules on vacuum-evaporated thick silver films, the usual surface selection rule that applied to Bat metal surfaces also seemed applicable to the surface of fine metal particles, as long as the diameter of the particles was near 2 mu m. Metal powders with diameters greater than 5 mu m appeared inappropriate as an adsorbent, however, probably because of particle sizes quite close to the wavelength of the infrared light used.

引用

页码：1047 / 1052

页数：6

共 31 条

[1] AN INFRARED REFLECTION SPECTROSCOPY STUDY OF ORIENTED CADMIUM ARACHIDATE MONOLAYER FILMS ON EVAPORATED SILVER [J].