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 ](ClO 4 ) 2 ·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 (H 2 O) 4 (tca) 2 (bpmp) 2 ]·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.