Method for acquiring low-frequency transmission infrared spectra of adsorbed compounds on silica gels

被引：4

作者：

Cox, JK

Tripp, CP ^{[1
]}

机构：

[1] Univ Maine, Dept Chem, Orono, ME 04469 USA

[2] Univ Maine, Surface Sci & Technol Lab, Sawyer Res Ctr 5764, Orono, ME 04469 USA

来源：

APPLIED SPECTROSCOPY | 2000年 / 54卷 / 01期

关键词：

transmission IR; silica gel; silanes;

D O I：

10.1366/0003702001948231

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A transmission infrared technique for detecting bands due to adsorbed species on silica gels in the region 4000 to 200 cm(-1) is described. The region below 1300 cm(-1) contains strong Si-O bulk modes that dominate the much weaker hands due to adsorbed species. Silica gels are strong infrared scatterers, and adsorbed molecules lead to changes in the spectral artifacts in the region containing the bulk modes. These artifacts dominate and mask out the much weaker bands due to adsorbed species. By embedding the silica gel in a pliable polymer film of similar refractive index, one minimizes the artifacts, enabling detection of bands attributed to adsorbed compounds.

引用

页码：144 / 147

页数：4

共 26 条

[1] REACTIONS OF TITANIUM TETRACHLORIDE WITH MODIFIED SILICA-GEL SURFACES STUDIED BY DIFFUSE REFLECTANCE FT-IR SPECTROSCOPY [J].