One‐Step Synthesis of 2,5‐Bis(chloromethyl)‐1,4‐dioxane from Epichlorohydrin Using ZIF‐8, Taking Advantage of Structural Defects

Abstract

We demonstrate herein the ZIF‐8‐only‐mediated catalysis of the cyclodimerization of epichlorohydrin to 2,5‐bis(chloromethyl)‐1,4‐dioxane in the absence of co‐catalyst and solvent. The easy handling and economic aspects of ZIF‐8, in addition to the one‐step reaction to produce the cyclodimer, make this catalyst attractive even for industry. It has been clearly illustrated that the nature of the method used to synthesize ZIF‐8 affected the yields of the cyclodimers. Specifically, the method employed to produce ZIF‐8 directly influences the amount of crystal structural defects, which in turn impacts their performance as catalysts. To emphasize the role of defects, other physical properties, such as surface area and particle size, were controlled during the synthesis of the ZIF‐8 catalysts. Remarkably, the amount of structural defects was quantified by temperature program desorption analysis.

Encapsulation of Phosphorescent Pt(II) Complexes in Zn-Based Metal–Organic Frameworks toward Oxygen-Sensing Porous Materials

“…When the complex@ZIF-8 product is dried after synthesis, the solvate shell is evaporated, resulting in a super pore “rattle” with the complex inside. It has been shown for ZIF-8 that synthesis procedures which lead to the targeted addition of defects in the ZIF-8 structure increase the surface area by 100 to 250 m 2 g –1 (and also the pore volume). , Also, additional reactants can change the ZIF-8 surface area . Here, the in situ synthesis of the complex@ZIF-8 composites requires slightly inherent differences in the synthesis conditions from the neat ZIF-8 .…”