Nature of acidic protons in metallosilicate molecular sieves as studied by variable temperature 1H MAS NMR

被引：1

作者：

Baba, T ^{[1
]}

Morikawa, Y

Komatsu, N

Takahashi, T

Sugisawa, H

Ono, Y

机构：

[1] Tokyo Inst Technol, Dept Chem Engn, Meguro Ku, Tokyo 1528552, Japan

[2] Japan Energy Analyt Res Ctr Co Ltd, Toda, Saitama 335, Japan

[3] JEOL Ltd, Analyt Instrument Div, Akishima, Tokyo 196, Japan

来源：

RESEARCH ON CHEMICAL INTERMEDIATES | 2000年 / 26卷 / 01期

关键词：

D O I：

10.1163/156856700X00048

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The dynamic properties of protons in H-[Ga]-ZSM-5. H-[B]-ZSM-5 and H-[Al-B]-ZSM-5 were compared with that ofprotons in H-[Al]-ZSM-5 by temperature dependence of H-1 MAS NMR in the range of 298 k and 473 K. The temperature dependence of the line width of H-1 MAS NMR reveals that protons in H-[Ga]-ZSM-5 were more mobile than those in H-[Al]-ZSM-5 at temperature as low as 373 K. The protons in H-[B]-ZSM-5 were not mobile at 473 K and fixed in the zeolite frame work as the bridging hydroxyl groups, = B-OH-Si =. The thermal motion of protons in = Al-OH-Si = was suppressed by introducing B3+ cations into the framework of H-[Al]-ZSM-5.

引用

页码：13 / 20

页数：8

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