Simultaneous transformation of 2D to 3D and doped metal transitions of zeolitic imidazole frameworks under solid phase and free-solvent conditions

Abstract

The post-thermal treatment (PTT) method was applied for crystal transformation 2D into the 3D structure of zeolitic imidazolate frameworks (ZIFs) under solvent-free conditions. The investigation was performed based on the...

Tuning Coordination in ZIF-67 Through the Solid-State Thermal Synthesis for Balancing Structural Stability and Catalytic Reactivity

“…It is worth mentioning that the 1:2 ratio seems to be the lowest precursor ratio ever reported for the synthesis of ZIF-67. Usually, 2D structures (ZIF-L) are obtained by applying a low precursor ratio under the solvothermal method. , …”

“…Usually, 2D structures (ZIF-L) are obtained by applying a low precursor ratio under the solvothermal method. 16,17 The precursor ratio for the ZIF-67 synthesis using the SST affected the surface area and porosity properties and was evaluated via N 2 sorption at 77K (STP). The N 2 sorption at relatively low pressure (P/P 0 < 0.05) suddenly increases from the ratio 1:1 (ZIF-67_1:1) to 1:2 (ZIF-67_1:2) and then remains stable for the ratio 1:2 up to 1:4 (ZIF-67_1:4), as shown in Figure 2a.…”

Transformation of ZIF-67 Nanocubes to ZIF-L Nanoframes

“…As shown in Figure , there is a widespread consensus that the 2D ZIF-L serves as an intermediate transition phase during the synthesis of the 3D ZIF-67. − Deacon et al successfully achieved the kilogram-scale production of ZIF-8 through the transformation from ZIF-L . Theoretically, spontaneous transformation from ZIF-67 to ZIF-L is almost impossible due to the presence of thermodynamic barriers. ,,, Thus, achieving the transformation of 3D ZIF-67 to 2D ZIF-L is of immense theoretical interest and practical importance.…”