Anderson polyoxometalate built-in covalent organic frameworks for enhancing catalytic performances

Abstract

Covalent organic frameworks (COFs) have functional synthons, diverse structures and feature-rich functionality. Herein, the combination of a linear linker NH₂–{MMo₆}–NH₂ with 4-connected tetrahedral tetrakis(4-formylphenyl)silicon building units produced three isostructural complexes M-Anderson-COFs with a 3-fold interpenetrated diamondoid network. Among them, Mn-Anderson-COF exhibited the highest catalytic activity in the photodegradation of RhB and MB in water. The addition of different scavengers demonstrated that ¹O₂ and H₂O₂ were primary reactive species to degrade the dyes. Moreover, using M-Anderson-COF as a catalyst, organic sulfides were almost completely oxidized with 100% sulfoxide/sulfone selectivity.