Interaction of aromatics with Bronsted sites in zeolites: Demarcation line between regions of stable existence of H-complexes and ion pairs for various types of bases

被引：14

作者：

Paukshtis, EA ^{[1
]}

Malysheva, LV ^{[1
]}

Stepanov, VG ^{[1
]}

机构：

[1] Boreskov Inst Catalysis, Fed Sci Ctr, Novosibirsk 630090, Russia

来源：

REACTION KINETICS AND CATALYSIS LETTERS | 1998年 / 65卷 / 01期

关键词：

Bronsted acid sites; organic bases; H-complexes; ion pairs; IR spectroscopy;

D O I：

10.1007/BF02475328

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Interaction of naphthalene, a-methylnaphthalene, and hexamethylbenzene with OH groups of SiO2, HNaY and H-ZSM-5 zeolites was studied by IR spectroscopy. The results are compared with data obtained for other types of organic bases. Specificity in the generation of H-complexes of olefins, arenes, naphthalenes, N- and O-bases with Bronsted surface sites was elucidated. Each ype of base appears to have its particular correlation of (PA(a) -PA(b)) and the shift of Delta nu(OH) band in H-complexes. It has been found that if (PA(a) -PA(b)) is less than 85+/-5 kcal/mol, the formation of ion pairs is thermodynamically more favorable than that of H-complexes for all types of organic compounds.

引用

页码：145 / 152

页数：8