One rare 3D unipolar pillared-layer framework with a 1D carboxyl-copper chain formed by the syn-anti-COO- group

One 3D pillared-layer coordination polymer has been prepared from a solvothermal reaction of Cu(NO3)2·3H2O with isophthalic acid (H2ipa) and 1,4-bis(imidazolyl)benzene (bib). The pyramid CuII node is connected by the ipa2 − ion and the bib spoke to afford a rare 3D unipolar pillared-layer framework. The overall topology can be described as a 6-connected self-catenated mab topology with point symbol of {44.610.8} through crosslink the (4,4) sheets. The weak AFM interaction in the 1D chain has been estimated as − 0.15 cm− 1 by fitting the experimental data. Furthermore, the magneto-structural correlation has been well discussed.352