Postsynthetic Improvement of the Physical Properties in a Metal–Organic Framework through a Single Crystal to Single Crystal Transmetallation1. Issue 22 (14th April 2015) - Grancha, Thais
Abstract A single crystal to single crystal transmetallation process takes place in the three‐dimensional (3D) metal–organic framework (MOF) of formula MgII2{MgII4[CuII2(Me3mpba)2]3}⋅45 H2O (1; Me3mpba4−=N, N′‐2, 4, 6‐trimethyl‐1, 3‐phenylenebis(oxamate)). After complete replacement of the MgII ions within the coordination network and those hosted in the channels by either CoII or NiII ions, 1 is transmetallated to yield two novel MOFs of formulae Co2II{CoII4[CuII2(Me3mpba)2]3}⋅56 H2O (2) and Ni2II{NiII4[CuII2(Me3mpba)2]3}⋅ 54 H2O (3). This unique postsynthetic metal substitution affords materials with higher structural stability leading to enhanced gas sorption and magnetic properties.