Themed collection Covalent organic frameworks
Covalent organic frameworks
The last 10 years have seen an explosion of interest in crystalline porous frameworks, in particular metal–organic frameworks (MOFs) and porous coordination polymers (PCPs).
Development of organic porous materials through Schiff-base chemistry
In this highlight, we review the recent progress of utilizing Schiff-base chemistry to construct porous discrete organic molecular cages and polymer networks. Their applications in gas adsorption and catalysis were also discussed.
Identification of solid-state forms of
cucurbituril for carbon dioxide capture
Three novel crystalline forms of cucurbituril (CB, 1) have been identified by fine control of the mixing process of a hydrochloride solution of CB with ethanol.
Facile synthesis of a mesoporous benzothiadiazole-COF based on a transesterification process
A transesterification process to synthesize a mesoporous functionalized COF starting from a benzothiadiazole bis-pinacolboronate in only 40 min.
Eliminating disorder in a self-assembled
Synthesis of a new calixarene building block facilitates elimination of crystallographic disorder in the corresponding self-assembled triply helical nanotube motif (shown), as well as the interstitial regions between neighbouring assemblies.
Targeted synthesis of a mesoporous triptycene-derived covalent organic framework
A mesoporous triptycene-derived 2D COF has been prepared and fully characterized. The use of triptycene leads to a high surface area (SALang = 3832 m2 g−1), accessible boron-sites, and high gas uptake under low pressure settings.
Solvent diffusion and binding in a ‘nonporous’ molecular crystal
Crystals of a series of solvated cadmium-based metallocycles undergo single-crystal to single-crystal transformations (SCTSCT) upon desolvation to yield an empty apohost; these transiently porous crystals then allow the diffusion of bulky solvent molecules.
dipeptide crystals as selective CO2 adsorbents: experimental isotherms vs. grand canonical Monte Carlo simulations and MAS NMR spectroscopy
Molecular crystals of dipeptides containing open channels can selectively absorb CO2 over N2 and CH4, as shown by experimental and simulated isotherms.
Accessing functionalized porous aromatic frameworks (PAFs) through a de novo approach
Methyl-, hydroxymethyl-, and phthalimidomethyl-functionalized versions of the porous organic polymer PAF-1 have been obtained through de novo synthesis.
Star-shaped two-dimensional covalent organic frameworks
A new C3-symmetric vertex unit forms a class of star-shaped COFs with high surface area and tunable 1D channel apertures.
Side functionalization of
diboronic acid precursors for covalent organic frameworks
A series of substituted 1,4-benzenediboronic acids (BDBA) was synthesized and their thermal properties investigated.
In-situ coordination chemistry within cobalt-containing
phthalocyanine nanoporous crystals
In-situ coordination chemistry allows the control over cobalt cation oxidation state, axial ligand and crystal stability within phthalocyanine nanoporous crystals.
Hypothetical 3D-periodic covalent organic frameworks: exploring the possibilities by a first principles derived force field
A scheme to predict as yet unknown, hypothetical covalent organic frameworks (COFs) from scratch by screening the possible space of supramolecular isomers is presented.
sorption behavior of a new polymorph of azacalixarene pentamethyl ether as controlled by crystal architecture
A new polymorph of azacalixarene pentamethyl ether has been prepared. A comparative study demonstrated that the solid–gas sorption behavior of two polymorphic forms was controlled by the crystal architecture.
Guest diffusion in
In this work we determined the transport diffusivities of CO2, CH4, N2, O2, and Ar in Leu–Ser dipeptide crystals.
About this collection
collection features the latest research on covalent organic frameworks (COFs). Guest Edited by Professor Andrew Cooper, the articles in this collection highlight the unique properties of porous organic solids and the range of potential applications they have.