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 (H(3)tca), and bis(4-pyridylmethyl)piperazine (bpmp) resulted in generation of [Zn-3(tca)(2)(bpmp)(Hbpmp)(2)](ClO4)(2)center dot 5H(2)O}(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 {[Zn-3(H2O)(4)(tca)(2)(bpmp)(2)]center dot 8H(2)O}(n) (2), which manifests a new yet simple 3-fold interpenetrated (6(3))(6(5)8) 3,4-connected three-dimensional (3-D) binodal network. Both materials undergo blue-violet luminescence upon exposure to UV radiation.