Non-monotonic lattice expansion in zeolitic imidazolate frameworks during heating.

The effect of substituting linkers with two additional methyl groups for conventional benzimidazolate on the thermal expansion behaviour of ZIF-62 was investigated by high-energy X-ray diffraction. Increased structural integrity was observed with the addition of methyl groups, and variable anisotropic thermal expansion was discovered in ZIF-62 and its derivative.

The glass transition in the high-density amorphous Zn/Co-ZIF-4.

The high-density amorphous phases (HDAs) of bimetallic zeolitic imidazolate frameworks (Zn/Co-ZIF-4) were prepared. The temperature dependence of the isobaric heat capacity () of ZIF-4 HDAs was measured to determine the glass transition temperature () of HDAs. The non-linearly decreases with the molar ratio , where is Co/(Co + Zn), indicating the presence of a mixed-metal node effect.

Fabrication of Super-Sized Metal Inorganic-Organic Hybrid Glass with Supramolecular Network via Crystallization-Suppressing Approach.

Metal coordination compound (MCC) glasses [e.g., metal-organic framework (MOF) glass, coordination polymer glass, and metal inorganic-organic complex (MIOC) glass] are emerging members of the hybrid glass family.

Mixed metal node effect in zeolitic imidazolate frameworks.

We synthesized two series of bimetallic (zinc and cobalt) zeolitic imidazolate frameworks (ZIF-62) under different solvothermal conditions. It is found that the structure of the derived ZIF crystals is highly sensitive to synthesis conditions. One series possesses the standard ZIF-62 structure, whereas the other has a mixed structure composed of both the standard structure and an unknown one.