期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 136, 期 9, 页码 3342-3345出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja411915c
关键词
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资金
- Spanish Government [MAT2012-38567-C02-01, MAT2012-38567-C02-02, CSD-2009-00050, SEV-2012-0267]
- FPI
A new zeolite (named as ITQ:52) having large cavities and small and medium channels has been synthesized. This was achieved by using a new family of amino-phosphonium cations as organic structure directing agents (OSDA). These cations contain P-C and P-N bonds, and therefore they lie between previously reported P-containing OSDA, such as tetraalkylphosphonium and phosphazenes. In this study, it has been found that 1,4-butanediylbis[tris(dimethylamino)]phosphonium dication is a very efficient OSDA for crystallization of several zeolites, and in some particular conditions, the new zeolite ITQ-52 was synthesized as a pure phase. The structure of ITQ-52 has been solved using high-resolution synchrotron X-ray powder diffraction data of the calcined solid. This new zeolite crystallizes in the space group I2/m, with cell parameters a = 17.511 angstrom, b = 17.907 angstrom, c = 12.367 angstrom, and beta = 90.22 degrees. The topology of ITQ-52 can be described as a replication of a composite building unit with ring notation [4(3)5(4)6(1)] that gives rise to the formation of an interconnected 8R and 10R channel system.
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