Coordinated Water as New Binding Sites for the Separation of Light Hydrocarbons in Metal-Organic Frameworks with Open Metal Sites.

Metal-organic frameworks with open metal sites are promising materials for gas separations. Particularly, the M(dobdc) (dobdc = 2,5-dioxidobenzenedicarboxylate, M = Co, Mn, Fe, ..

Flexibility control in alkyl ether-functionalized pillared-layered MOFs by a Cu/Zn mixed metal approach.

Flexible metal-organic frameworks (MOFs) exhibit large potential as next-generation materials in areas such as gas sensing, gas separation and mechanical damping. By using a mixed metal approach, we report how the stimuli reponsive phase transition of flexible pillared-layered MOFs can be tuned over a wide range. Different Cu2+ to Zn2+ metal ratios are incorporated into the materials by using a simple solvothermal approach.

Control of structural flexibility of layered-pillared metal-organic frameworks anchored at surfaces.

Flexible metal-organic frameworks (MOFs) are structurally flexible, porous, crystalline solids that show a structural transition in response to a stimulus. If MOF-based solid-state and microelectronic devices are to be capable of leveraging such structural flexibility, then the integration of MOF thin films into a device configuration is crucial. Here we report the targeted and precise anchoring of Cu-based alkylether-functionalised layered-pillared MOF crystallites onto substrates via stepwise liquid-phase epitaxy.

Pore closure in zeolitic imidazolate frameworks under mechanical pressure.

We investigate the pressure-dependent mechanical behaviour of the zeolitic imidazolate framework ZIF-4 (M(im); M = Co or Zn, im = imidazolate) with high pressure, synchrotron powder X-ray diffraction and mercury intrusion measurements. A displacive phase transition from a highly compressible open pore () phase with continuous porosity (space group , bulk modulus ∼1.4 GPa) to a closed pore () phase with inaccessible porosity (space group 2/, bulk modulus ∼3.

Linker functionalisation triggers an alternative 3D-topology for Zn-isophthalate-4,4'-bipyridine frameworks.

A series of four Zn metal-organic frameworks containing functionalised isophthalate linkers and 4,4'-bipyridine pillars have been prepared and characterised. Isophthalates which contain -OCH alkoxy side chains (with n = 1, 2 or 3) form frameworks with a 3D pillared-layer topology instead of the typical 2D layer topology of the renowned coordination polymers with an interdigitated structure (CIDs), which is found for shorter -OCH side chains. The gas adsorption properties of the materials were analysed using N, CO and O adsorption measurements at low temperatures.