ULTRAVIOLET RESONANCE RAMAN-SPECTROSCOPY OF 4-AMINOPYRIDINE ADSORBED ON ZEOLITE-Y

被引：16

作者：

JAKUPCA, MR ^{[1
]}

DUTTA, PK ^{[1
]}

机构：

[1] OHIO STATE UNIV,DEPT CHEM,120 W 18TH AVE,COLUMBUS,OH 43210

来源：

ANALYTICAL CHEMISTRY | 1992年 / 64卷 / 08期

关键词：

D O I：

10.1021/ac00032a021

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Resonance Raman spectroscopy is used in this paper to examine the weak acid sites of zeolite surfaces. 4-Aminopyridine, a base with a pK(a) of 9.17, is used as a probe. Upon protonation by the zeolite, the pyridine's major UV electronic absorption band undergoes a bathochromic shift. By using excitation that coincides with the maximum of this absorption band (264 nm), it is possible to selectively study the Raman spectra of the protonated species and detect the presence of weakly acidic hydroxyl groups.

引用

页码：953 / 957

页数：5

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