Metal-Organic Framework Structures

The Fascinating Structure and the Potential of Metal-Organic Frameworks... 

The search for better catalysts has been facilitated in recent years by molecular modeling. We are seeing here a step change. This is the subject of Chapter 1 (Molecular Catalytic Kinetics Concepts). New types of catalysts appeared to be more selective and active than conventional ones. Tuned mesoporous catalysts, gold catalysts, and metal organic frameworks (MOFs) that are discussed in Chapter 2 (Hierarchical Porous Zeolites by Demetallation, 3 (Preparation of Nanosized Gold Catalysts and Oxidation at Room Temperature), and 4 (The Fascinating Structure... 

Water stability is a major challenge that has to be overcome before metal organic framework can be used in removing carbon dioxide from flue gas. The core structure of MOF reacts with water vapor content in the flue gas leading to severe distortion of the structure and even failure. As a consequence, the physical structure of MOF is changed, e.g., reduction of porosity and surface area, etc. that decreases the capacity and selectivity for C02. Complete dehydration of flue gas increases the cost of separation. It is therefore essential for MOFs to exhibit stability in the presence of water up to certain extent [91]. 

The first part of the book documents the history, structure, chemistry, formulation and characterizations of zeolites in Chapters 1-4. The past 60 years have seen a progression in molecular sieve materials from aluminosilicate zeolites to micro-porous silica polymorphs, microporous aluminophosphate-based polymorphs, metallosihcate and metallophosphate compositions, octahedral-tetrahedral frameworks, mesoporous molecular sieves and, most recently, hybrid metal organic frameworks (MOFs). 

Construction AND Structure of Metal-Organic Frameworks with Specific Ion-Exchange Property... 

Fig. 11 Crystal structure of a metal-organic framework material Zn2(fina)2(bipy) prepared by mechanochemical synthesis, with the structure determined directly from powder XRD data. The structure is viewed (a) along the c-axis and (b) along the b-axis. The two (identical) interpenetrated frameworks are indicated by yellow and purple shading. For comparison, (c) and (d) show the corresponding views of the stmcture of a DMF solvate material Zn2(fma)2(bipy)(DMF)o.5 prepared by a solvothermal route. Although there is some similarity between these structures, there are nevertheless important stmctural differences between them...

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