Extra-large pore zeolite (ITQ-40) with the lowest framework density containing double four- and double three-rings

被引：136

作者：

Corma, A. ^{[1
]}

Diaz-Cabanas, M. J. ^{[1
]}

Jiang, J. ^{[1
]}

Afeworki, M. ^{[2
]}

Dorset, D. L. ^{[2
]}

Soled, S. L. ^{[2
]}

Strohmaier, K. G. ^{[2
]}

机构：

[1] Univ Politecn Valencia, Inst Tecnol Quim, CSIC, E-46071 Valencia, Spain

[2] ExxonMobil Res & Engn Co, Corp Strateg Res, Annandale, NJ USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2010年 / 107卷 / 32期

基金：

欧盟地平线“2020”;

关键词：

double three-rings in zeolites; low framework density zeolites; germanosilicate zeolites; CRYSTAL-STRUCTURE; MOLECULAR-SIEVE; ELECTRON-DIFFRACTION; PROGRAM SYSTEM; LOCATION; CATIONS; SIZE;

D O I：

10.1073/pnas.1003009107

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The first zeolite structure (ITQ-40) that contains double four (D4) and double three (D3) member ring secondary building units has been synthesized by introducing Ge and NH4F and working in concentrated synthesis gels. It is the first time that D3-Rs have been observed in a zeolite structure. As was previously analyzed [Brunner GO, Meier, WM (1989) Nature 337:146-147], such a structure has a very low framework density (10.1 T/1,000 angstrom(3)). Indeed, ITQ-40 has the lowest framework density ever achieved in oxygen-containing zeolites. Furthermore, it contains large pore openings, i.e., 15-member rings parallel to the [001] hexagonal axis and 16-member ring channels perpendicular to this axis. The results presented here push ahead the possibilities of zeolites for uses in electronics, control delivery of drugs and chemicals, as well as for catalysis.

引用

页码：13997 / 14002

页数：6

共 43 条

[1] SIR97:: a new tool for crystal structure determination and refinement [J].

Altomare, A ;

Burla, MC ;

Camalli, M ;

Cascarano, GL ;

Giacovazzo, C ;

Guagliardi, A ;

Moliterni, AGG ;

Polidori, G ;

Spagna, R .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1999, 32 :115-119

[2] VPI-7 - THE 1ST ZINCOSILICATE MOLECULAR-SIEVE CONTAINING 3-MEMBERED T-ATOM RINGS [J].

ANNEN, MJ ;

DAVIS, ME ;

HIGGINS, JB ;

SCHLENKER, JL .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1991, (17) :1175-1176

[3]

[Anonymous], 1995, ANGEW CHEM

[4]

[Anonymous], STUD SURF SCI CATAL

[5] LOCATION OF THE 18-CROWN-6 TEMPLATE IN EMC-2 (EMT) RIETVELD REFINEMENT OF THE CALCINED AND AS-SYNTHESIZED FORMS [J].

BAERLOCHER, C ;

MCCUSKER, LB ;

CHIAPPETTA, R .

MICROPOROUS MATERIALS, 1994, 2 (04) :269-280

[6]

BAERLOCHER C, 1977, DISTANCE LEAST SQUAR

[7] Preferential location of Ge in the double four-membered ring units of ITQ-7 zeolite [J].

Blasco, T ;

Corma, A ;

Díaz-Cabañas, MJ ;

Rey, F ;

Vidal-Moya, JA ;

Zicovich-Wilson, CM .

JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (10) :2634-2642

[8] FRAMEWORK DENSITY DISTRIBUTION OF ZEOLITE-TYPE TETRAHEDRAL NETS [J].

BRUNNER, GO ;

MEIER, WM .

NATURE, 1989, 337 (6203) :146-147

[9] Large-cage zeolite structures with multidimensional 12-ring channels [J].

Bu, XH ;

Feng, PY ;

Stucky, GD .

SCIENCE, 1997, 278 (5346) :2080-2085

[10]

CAULLET P, 1991, EUR J SOL STATE INOR, V28, P345

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