A novel open-framework copper borophosphate containing 1-D borophosphate anion with 10-MR windows and 12-MR channels

Abstract

A novel open-framework copper borophosphate, Na₅KCu₃[B₉P₆O₃₃(OH)₃]·H₂O (1), has been synthesised by a boric acid flux method. Its structure can be viewed as a 3-D open framework constructed by the connection of Cu^IIO₆ octahedra and 1-D (4,4)-connected borophosphate anionic structures composed of trigonal-planar BO₂(OH) groups, tetrahedral BO₄ and PO₄ groups. The compound not only features a novel borophosphate anionic partial structure containing 1-D 12-MR channels, but also exhibits ferromagnetic interactions and high catalytic activity for the oxidative degradation of chitosan.