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
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
收藏
页码:13 / 20
页数:8
相关论文
共 17 条
[1]  
[Anonymous], ANN REP NMR SPECTROS
[2]   Long-range interaction of alkali cations with the acidic OH groups in H-ZSM-5 [J].
Baba, T ;
Inoue, Y ;
Ono, Y .
JOURNAL OF CATALYSIS, 1996, 159 (01) :230-235
[3]   Mobility of the acidic protons in H-ZSM-5 as studied by variable temperature 1H MAS NMR [J].
Baba, T ;
Komatsu, N ;
Ono, Y ;
Sugisawa, H .
JOURNAL OF PHYSICAL CHEMISTRY B, 1998, 102 (05) :804-808
[4]   SOLID-STATE NMR - A POWERFUL TOOL FOR THE INVESTIGATION OF SURFACE HYDROXYL-GROUPS IN ZEOLITES AND THEIR INTERACTIONS WITH ADSORBED PROBE MOLECULES [J].
BRUNNER, E .
JOURNAL OF MOLECULAR STRUCTURE, 1995, 355 (01) :61-85
[5]   ISOMORPHOUS SUBSTITUTION IN ZEOLITE FRAMEWORKS .1. ACIDITY OF SURFACE HYDROXYLS IN [B]-ZSM-5, [FE]-ZSM-5, [GA]-ZSM-5, AND [AL]-ZSM-5 [J].
CHU, CTW ;
CHANG, CD .
JOURNAL OF PHYSICAL CHEMISTRY, 1985, 89 (09) :1569-1571
[6]   INFLUENCE OF THERMAL MOTION UPON THE LINESHAPE IN MAGIC-ANGLE-SPINNING EXPERIMENTS [J].
FENZKE, D ;
GERSTEIN, BC ;
PFEIFER, H .
JOURNAL OF MAGNETIC RESONANCE, 1992, 98 (03) :469-474
[7]  
FREUDE D, 1991, J MAGN RESON, V95, P477
[8]   Physical organic chemistry of solid acids: Lessons from in situ NMR and theoretical chemistry [J].
Haw, JF ;
Nicholas, JB ;
Xu, T ;
Beck, LW ;
Ferguson, DB .
ACCOUNTS OF CHEMICAL RESEARCH, 1996, 29 (06) :259-267
[9]   Multinuclear solid-state NMR studies of acidic and non-acidic hydroxyl protons in zeolites [J].
Hunger, M .
SOLID STATE NUCLEAR MAGNETIC RESONANCE, 1996, 6 (01) :1-29
[10]   SOLID-STATE NMR-STUDIES OF MOLECULAR-SIEVE CATALYSTS [J].
KLINOWSKI, J .
CHEMICAL REVIEWS, 1991, 91 (07) :1459-1479