Acidic ionic liquid based UiO-67 type MOFs: a stable and efficient heterogeneous catalyst for esterification.

ABSTRACT: A facile strategy for the synthesis of acidic ionic liquid based UiO-67 type MOFs was developed in this study. Brønsted acids (H₂SO₄, CF₃SO₃H and hifpOSO₃H (hexafluoroisopropyl sulfuric acid)) were introduced into UiO-67-bpy (bpy = 2,2'-bipyridine-5,5'-dicarboxylic acid) frameworks by reacting with bipyridyl nitrogen to introduce the properties of an acidic ionic liquid into the frameworks. The prepared catalysts, denoted as UiO-67-HSO₄, UiO-67-CF₃SO₃ and UiO-67-hifpOSO₃, were characterized by XRD, SEM, FT-IR, EA, TGA and N₂ adsorption-desorption studies. The relatively high surface area was still maintained and acidic active groups were uniformly dispersed in the frameworks. The c

SUBMITTER: Xu Z 

PROVIDER: S-EPMC9078748 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature