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      Extra-large-pore zeolites with two-dimensional channels formed by 14 and 12 rings.

      Science (New York, N.Y.)

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          Abstract

          Stable zeolites that have larger pore apertures and a three-dimensional pore topology are of interest because they could be used to adsorb larger molecules, particularly for application in oil refining. Several large-pore zeolitic materials with channels formed by openings of more than 12 rings are known, but all of them have a one-dimensional channel system that limits their use in catalysis. We report the synthesis and some characterizations of IM-12, a thermally stable germanium-containing zeolite that contains the first two-dimensional channel system with extra-large pores formed by 14- and 12-ring channels.

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          Journal
          15143276
          10.1126/science.1098242

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