Journal ArticleDOI
Porous, Crystalline, Covalent Organic Frameworks
Adrien P. Côté,Annabelle I. Benin,Nathan W. Ockwig,Michael O'Keeffe,Adam J. Matzger,Omar M. Yaghi +5 more
Reads0
Chats0
TLDR
Covalent organic frameworks (COFs) have been designed and successfully synthesized by condensation reactions of phenyl diboronic acid and hexahydroxytriphenylene to form rigid porous architectures with pore sizes ranging from 7 to 27 angstroms.Abstract:
Covalent organic frameworks (COFs) have been designed and successfully synthesized by condensation reactions of phenyl diboronic acid {C6H4[B(OH)2]2} and hexahydroxytriphenylene [C18H6(OH)6]. Powder x-ray diffraction studies of the highly crystalline products (C3H2BO)6.(C9H12)1 (COF-1) and C9H4BO2 (COF-5) revealed expanded porous graphitic layers that are either staggered (COF-1, P6(3)/mmc) or eclipsed (COF-5, P6/mmm). Their crystal structures are entirely held by strong bonds between B, C, and O atoms to form rigid porous architectures with pore sizes ranging from 7 to 27 angstroms. COF-1 and COF-5 exhibit high thermal stability (to temperatures up to 500 degrees to 600 degrees C), permanent porosity, and high surface areas (711 and 1590 square meters per gram, respectively).read more
Citations
More filters
Journal ArticleDOI
Orthogonal self-assembly of a trigonal triptycene triacid: signaling of exfoliation of porous 2D metal–organic layers by fluorescence and selective CO2 capture by the hydrogen-bonded MOF
TL;DR: In this paper, the authors show that the interlayer hydrogen bonds can be disrupted by solvents such as DMSO, leading to solvent-induced delamination of 2D metal-organic nanosheets.
Journal ArticleDOI
Fluorocarbon adsorption in hierarchical porous frameworks.
Radha Kishan Motkuri,Harsha V. R. Annapureddy,M. Vijaykumar,H. Todd Schaef,Paul F. Martin,B. Peter McGrail,Liem X. Dang,Rajamani Krishna,Praveen K. Thallapally +8 more
TL;DR: Metal-organic frameworks comprise an important class of solid-state materials and have potential for many emerging applications such as energy storage, separation, catalysis and bio-medical, and the possibility of exploiting these sorbents for separation of azeotropic mixtures of fluorocarbons is suggested.
Journal ArticleDOI
Mixed Matrix Membranes for Natural Gas Upgrading: Current Status and Opportunities
TL;DR: In this paper, mixed matrix membranes (MMMs) by incorporating organic/inorganic fillers into the polymer matrix provides a good strategy to combine the merits of each material and fabricate novel membranes with superior gas separation performance.
Journal ArticleDOI
Covalent Organic Nanosheets Integrated Heterojunction with Two Strategies To Overcome Hypoxic-Tumor Photodynamic Therapy
Kui Wang,Kui Wang,Zhe Zhang,Lin Lin,Jie Chen,Jie Chen,Kai Hao,Kai Hao,Huayu Tian,Huayu Tian,Xuesi Chen,Xuesi Chen +11 more
TL;DR: In this paper, covalent photodynamic therapy (PDT) was used to overcome the oxygen-dependent property of PDT, which limits its therapeutic efficiency against hypoxic tumor.
Journal ArticleDOI
PolyCOFs: A New Class of Freestanding Responsive Covalent Organic Framework Membranes with High Mechanical Performance.
Zhifang Wang,Qi Yu,Yubo Huang,Hongde An,Yu Zhao,Yifan Feng,Xia Li,Xinlei Shi,Jiajie Liang,Fusheng Pan,Peng Cheng,Yao Chen,Shengqian Ma,Zhenjie Zhang +13 more
TL;DR: It is demonstrated that polyCOF membranes can be used as artificial muscles to perform various complicated motions triggered by vapors and paves a new avenue to prepare stimuli-responsive actuators using porous COF materials.
References
More filters
Book
Adsorption by Powders and Porous Solids: Principles, Methodology and Applications
TL;DR: In this paper, the authors provide an introductory review of the various theoretical and practical aspects of adsorption by powders and porous solids with particular reference to materials of technological importance.
Journal ArticleDOI
An ordered mesoporous organosilica hybrid material with a crystal-like wall structure.
TL;DR: The surfactant-mediated synthesis of an ordered benzene–silica hybrid material has an hexagonal array of mesopores and crystal-like pore walls that exhibit structural periodicity, and it is expected that other organosilicas and organo-metal oxides can be produced in a similar fashion, to yield a range of hierarchically ordered mesoporous solids with molecular-scale pore surface periodicity.
Journal ArticleDOI
Unified Approach to Pore Size Characterization of Microporous Carbonaceous Materials from N2, Ar, and CO2 Adsorption Isotherms†
TL;DR: In this paper, a unified approach to pore size characterization of microporous carbonaceous materials such as activated carbon and carbon fibers by nitrogen, argon, and carbon dioxide adsorption at standard temperatures, 77 K for N2 and Ar and 273 K for CO2, was presented.
Journal ArticleDOI
Adsorption Study of Surface and Structural Properties of MCM-41 Materials of Different Pore Sizes
TL;DR: In this paper, the pore size of MCM-41 materials was estimated based on geometrical considerations of the ratio of pore volume to pore wall volume for an infinite hexagonal array of cylindrical pores.