PYRIDINE USED AS A PROBE FOR INTERNAL BRONSTED ACID SITES IN PYROCHLORE ANTIMONY(V) OXIDE - AN INFRARED-SPECTROSCOPY STUDY

被引：14

作者：

BENVENUTTI, EV ^{[1
]}

GUSHIKEM, Y ^{[1
]}

DAVANZO, CU ^{[1
]}

机构：

[1] UNIV CAMPINAS,INST QUIM,CP 6154,BR-13081 CAMPINAS,SP,BRAZIL

来源：

APPLIED SPECTROSCOPY | 1992年 / 46卷 / 10期

关键词：

INFRARED; SURFACE ANALYSIS; PYROCHLORE; PROTONS;

D O I：

10.1366/000370292789619179

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Bronsted acid sites inside the 0.3-nm-diameter cavities of pyrochlore antimony (V) oxide were detected with the use of pyridine as a probe molecule, and following the appearance of pyridinium ions by infrared spectroscopy (8a and 19b modes). The pyridine molecule is larger than the cavities' windows and can only bind acid sites when the oxide is strongly hydrated. This observation indicates that the protons are free to migrate to the surface.

引用

页码：1474 / 1476

页数：3

共 21 条

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