Zinc Tricarballylate Coordination Polymers with a Threaded-Loop Self-Penetrated Layer and Triply Interpenetrated 3,4-Connected Binodal Network Structures: Topological Control through Anion Inclusion

Hydrothermal reaction of zinc perchlorate, tricarballylic acid (H3tca), and bis(4-pyridylmethyl)piperazine (bpmp) resulted in generation of {[Zn3(tca)2(bpmp)(Hbpmp)2](ClO4)2·5H2O}n (1), which possesses an unprecedented self-penetrated two-dimensional (2-D) layered topology with threaded-loop type linkages. A similar reaction using zinc sulfate as precursor afforded the oxoanion-free phase {[Zn3(H2O)4(tca)2(bpmp)2]·8H2O}n (2), which manifests a new yet simple 3-fold interpenetrated (63)(658) 3,4-connected three-dimensional (3-D) binodal network. Both materials undergo blue-violet luminescence upon exposure to UV radiation.