A Cu-based metal-organic framework with two types of connecting nodes as catalyst for oxygen activation

Abstract

Using a ditopic organic linker 4-(1 H -pyrazol-4-yl)benzoic acid (H 2 pba), FICN-6, a metal-organic framework containing both Cu 2 (O 2 CR) 4 and Cu 3 (OH)(pyz) 3 (O 2 CR) secondary building units (SBUs), was synthesized. FICN-6 adopts in an unusual intercatenated structure with SBUs from two distinct networks connecting to each other. Presence of Cu 3 clusters makes FICN-6 a good heterogeneous catalyst for oxygen activation and aerobic oxidative C-C coupling of organic boronic acids. FICN-6, a metal-organic framework containing both Cu 2 (O 2 CR) 4 and Cu 3 (OH)(pyz) 3 (O 2 CR) secondary building units, showed good catalytic activity for oxygen activation and aerobic oxidative coupling of organic boronic acids.