Rare metal-ion metathesis of a tetrahedral Zn() core of a noncentrosymmetric (3,4)-connected 3D MOF

An SHG-active noncentrosymmetric (3,4)-connected Zn( ii )-organic framework, {[Zn 2 (4-abpt)(3,4-pydc) 2 ]·2DMAc·3MeOH·H 2 O} n ( 1-Zn ), was synthesized using a mixed-ligand system. The 1-Zn framework undergoes metal metathesis, with the complete exchange of the tetrahedrally coordinated Zn II ions with Cu II ions while retaining the integrity of the network. An SHG-active framework of 1-Zn can undergo metal metathesis, in which the tetrahedrally coordinated Zn( ii ) ions are completely exchanged with Cu( ii ) ions while retaining the integrity of the network.