Journal ArticleDOI
Selective gas adsorption and separation in metal–organic frameworks
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TLDR
This critical review starts with a brief introduction to gas separation and purification based on selective adsorption, followed by a review of gas selective adsorbents in rigid and flexible MOFs, and primary relationships between adsorptive properties and framework features are analyzed.Abstract:
Adsorptive separation is very important in industry. Generally, the process uses porous solid materials such as zeolites, activated carbons, or silica gels as adsorbents. With an ever increasing need for a more efficient, energy-saving, and environmentally benign procedure for gas separation, adsorbents with tailored structures and tunable surface properties must be found. Metal–organic frameworks (MOFs), constructed by metal-containing nodes connected by organic bridges, are such a new type of porous materials. They are promising candidates as adsorbents for gas separations due to their large surface areas, adjustable pore sizes and controllable properties, as well as acceptable thermal stability. This critical review starts with a brief introduction to gas separation and purification based on selective adsorption, followed by a review of gas selective adsorption in rigid and flexible MOFs. Based on possible mechanisms, selective adsorptions observed in MOFs are classified, and primary relationships between adsorption properties and framework features are analyzed. As a specific example of tailor-made MOFs, mesh-adjustable molecular sieves are emphasized and the underlying working mechanism elucidated. In addition to the experimental aspect, theoretical investigations from adsorption equilibrium to diffusion dynamics via molecular simulations are also briefly reviewed. Furthermore, gas separations in MOFs, including the molecular sieving effect, kinetic separation, the quantum sieving effect for H2/D2 separation, and MOF-based membranes are also summarized (227 references).read more
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High-yield, fluoride-free and large-scale synthesis of MIL-101(Cr)
Tian Zhao,Felix Jeremias,Felix Jeremias,Ishtvan Boldog,Binh D. Nguyen,Stefan K. Henninger,Christoph Janiak +6 more
TL;DR: The effect of inorganic and organic acid modifiers was thoroughly investigated in the synthesis of MIL-101(Cr) and HNO3 could increase the yield to over 80% of a product with average SBET > 3200 m(2) g(-1) in repeated experiments (from an average of 50% in most published syntheses) in small-scale laboratory synthesis.
Journal ArticleDOI
Computational screening of metal-organic frameworks for xenon/krypton separation
TL;DR: In this paper, a variety of metal-organic frameworks (MOFs) with varying linkers, topologies, pore sizes, and metal atoms were screened for xenon/krypton separation using GCMC simulations.
Journal ArticleDOI
Crystal engineering of a microporous, catalytically active fcu topology MOF using a custom-designed metalloporphyrin linker.
Le Meng,Qigan Cheng,Chungsik Kim,Wen-Yang Gao,Lukasz Wojtas,Yu-Sheng Chen,Michael J. Zaworotko,X. Peter Zhang,Shengqian Ma +8 more
TL;DR: A MOF is reported that based upon a previously reported fcu topology net built from 12-connected cubohemioctahedral SBBs of formula 6(bdc)12 and benzoimidephenanthroline tetracarboxylate (bipa-tc) linkers (Scheme 1a), fcu-MOF-1.
Journal ArticleDOI
Gas-Induced Expansion and Contraction of a Fluorinated Metal−Organic Framework
Carlos Fernandez,Praveen K. Thallapally,Radha Kishan Motkuri,Satish K. Nune,Joseph C. Sumrak,Jian Tian,Jun Liu +6 more
TL;DR: In this paper, the synthesis and gas sorption properties of a novel fluorinated metal−organic framework using commercially available 2,2-bis(4-carboxyphenyl)hexafluoropropane is reported with high selectivity toward CO2, H2S, and SO2 as well as breathing motion upon solvent removal and gas inclusion.
Journal ArticleDOI
Porous anatase TiO2 constructed from a metal–organic framework for advanced lithium-ion battery anodes
Ziqi Wang,Xiang Li,Hui Xu,Yu Yang,Yuanjing Cui,Hongge Pan,Zhiyu Wang,Banglin Chen,Banglin Chen,Guodong Qian +9 more
TL;DR: Porous anatase TiO2 has shown moderate porosity with a BET surface area of 220 m2 g−1 attributed to the highly porous structure of the MIL-125(Ti) precursor.
References
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Functional porous coordination polymers.
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Reticular synthesis and the design of new materials
Omar M. Yaghi,Michael O'Keeffe,Nathan W. Ockwig,Hee K. Chae,Hee K. Chae,Mohamed Eddaoudi,Jaheon Kim +6 more
TL;DR: This work has shown that highly porous frameworks held together by strong metal–oxygen–carbon bonds and with exceptionally large surface area and capacity for gas storage have been prepared and their pore metrics systematically varied and functionalized.
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Design and synthesis of an exceptionally stable and highly porous metal-organic framework
TL;DR: In this article, an organic dicarboxylate linker is used in a reaction that gives supertetrahedron clusters when capped with monocarboxyates.
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From molecules to crystal engineering: supramolecular isomerism and polymorphism in network solids.
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Hybrid porous solids: past, present, future
TL;DR: The state-of-the-art on hybrid porous solids, their advantages, their new routes of synthesis, the structural concepts useful for their 'design', aiming at reaching very large pores are presented.