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Chemical Review 上2014.5催化最新综述一篇 已有2人参与
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Chemical Review 上2014.5催化最新综述一篇：Two-Dimensional Zeolites Current Status and Perspectives CONTENTS 1. Introduction 4807 2. Early Discoveries Relevant to Layered Zeolite Materials 4808 3. Layered Zeolite Materials: General Overview 4809 4. Synthesis of Layered Zeolite Precursors and Other Primary Lamellar Zeolite Forms 4812 4.1. Hydrothermal Synthesis of Lamellar Precur- sors 4813 4.2. Surfactant-Assisted Synthesis of Nanosheet Zeolites 4815 4.3. Two-Dimensional Zeolites Synthesized on Metal Supports 4816 4.4. Three- to Two-Dimensional Transformation of Parent Zeolites 4816 4.5. Assembly−Disassembly−Organization−Re- assembly Strategy 4816 5. Postsynthetic Modi cation of Layered Zeolite Precursors 4817 5.1. Precursor Detemplation 4817 5.2. Expansion of Interlamellar Space 4818 5.3. Stabilizing Interlayer Expanded Precursors 4819 5.4. Pillaring 4820 6. Delamination and Exfoliation 4822 6.1. MWW Family 4822 6.2. Other Delaminated Zeolites 4823 6.3. Colloidal Suspensions of Zeolite Nanosheets 4824 7. Structure of Lamellar Materials 4824 7.1. X-ray Powder Di raction and Electron Di raction 4824 7.2. Modeling of 2D Zeolites 4825 7.2.1. Application of Force Fields 482 7.2.2. Application of Density FunctionalTheory Methods 48258. Two-Dimensional Zeolites in Catalysis 48278.1. Petrochemistry 48288.2. Oxidation Reactions 48298.3. Fine Chemical Synthesis 48308.4. Organometallics 48309. Challenges and Opportunities 4830Author Information 4832Notes 4832Biographies 4832Acknowledgments 4833References 4833 1. INTRODUCTIONZeolites are well-known as valuable crystalline solids withframework structures containing discrete micropores ofmolecular dimensions that accommodate exchangeable extra-framework cation sites.1?3In terms of host?guest interactions,zeolites can be viewed as host frameworks with structurallyintact and immutable three-dimensional (3D) structures. Theyshow exceptional catalytic and sorption characteristics togetherwith very desirable environmental qualities.4?7Zeolites arewidely used in commercial applications as catalysts forhydrocarbon conversions in petroleum and chemical indus-tries,8?10as sorbents for small-molecule separation processes,and as ion exchangers in detergents.11The remarkable properties of zeolites are closely related totheir structural features.12Zeolites are composed of corner-sharing TO4tetrahedra, with T standing for tetrahedrallycoordinated framework atoms, such as Si and Al or otherheteroatoms.12,13Zeolites contain one-, two-, or three-dimen-sional systems of channels, which are interconnected in anumber of di erent ways. The topological uniqueness ofindividual zeolite structures is de ned by coordinationsequences and vertex symbols.14The number of possiblezeolites is (theoretically) unlimited;15?19however, only 213di erent framework structures are accepted so far by theStructural Commission of the International Zeolite Associationand have obtained a unique three-letter code.14,20Most of thesynthetic zeolites were obtained via solvothermal synthesis byuse of di erent reaction conditions, reactants, and structure- |
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2014-05-30 18:45:05, 11.96 M
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