Synthesis and characterization of the microporous silica phase RUB-3 (RTE)

被引：5

作者：

Grünewald-Lüke, A ^{[1
]}

Marler, B ^{[1
]}

Gies, H ^{[1
]}

机构：

[1] Ruhr Univ Bochum, Inst Mineral, D-44780 Bochum, Germany

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 1998年 / 26卷 / 1-3期

关键词：

RUB-3; synthesis; magic-angle spinning nuclear magnetic resonance spectroscopy; RTE; characterization;

D O I：

10.1016/S1387-1811(98)00212-1

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

RUB-3 (structure type code: RTE) was hydrothermally synthesized at 150-170 degrees C from reaction mixtures of the following composition: 1.0 SiO2:1.0-5.3 template:0.0-0.67 LiOH:55.5-111.0 H2O. So far, exo-2-aminobicyclo[2.2.1]-heptane is the only known structure-directing agent to stabilize RUB-3. RUB-3 crystallizes together with three other microporous materials: nonasil (NON), dodecasil 1H (DOH) and dodecasil 3C (MTN). The use of LiOH not only reduced the crystallization time but also suppressed the formation of the additional phases. X-ray diffraction analysis and Si-29 magic-angle spinning nuclear magnetic resonance (NMR) spectroscopy proved that the RUB-3 materials possess excellent crystallinity and a perfectly ordered structure. Moreover, the NMR spectra revealed that RUB-3 has a four-connected three-dimensional SiO2 framework that occludes exo-2-aminobicyclo[2.2.1]heptane in the pore system. The SiO2 framework of RUB-3 is stable up to at least 1000 degrees C. Calcination of the as-synthesized RUB-3, however, needs several days for completion. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：37 / 48

页数：12

共 14 条

[1] ZEOLITE AND MOLECULAR-SIEVE SYNTHESIS [J].

DAVIS, ME ;

LOBO, RF .

CHEMISTRY OF MATERIALS, 1992, 4 (04) :756-768

[2]

EGGLETON RA, 1991, CAN MINERAL, V29, P525

[3] THE STRUCTURE-CONTROLLING ROLE OF ORGANIC TEMPLATES FOR THE SYNTHESIS OF POROSILS IN THE SYSTEM SIO2/TEMPLATE/H2O [J].

GIES, H ;

MARLER, B .

ZEOLITES, 1992, 12 (01) :42-49

[4]

GIES H, 1994, STUDIES SURFACE SCI, V85, P306

[5]

GIES H, 1985, NACHR CHEM TECH LAB, V33, P387

[6] QUINUCLIDINE AND 3-AZABICYCLO[3.2.2]NONANE, 2 VERSATILE TEMPLATES IN THE SYNTHESIS OF POROUS SILICATES IN THE SIO2-B2O3-H2O-TEMPLATE SYSTEM [J].

GRUNEWALD, A ;

GIES, H .

MICROPOROUS MATERIALS, 1994, 3 (1-2) :159-164

[7] THE ROLE OF ORGANIC-MOLECULES IN MOLECULAR-SIEVE SYNTHESIS [J].

LOK, BM ;

CANNAN, TR ;

MESSINA, CA .

ZEOLITES, 1983, 3 (04) :282-291

[8]

Mandarino JA, 1979, CAN MINERAL, V17, P71

[9]

Mandarino J. A., 1976, CAN MINERAL, V14, P498

[10]

MARLER B, 1988, PHYS CHEM MINER, V16, P286

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