A en-templated 3D coordination polymer based on H2pzdc with macrometallocycles

A new Zn(II) coordination polymer, [Zn3(pzdc)4]·en (1) (H2pzdc = pyrazine-2,3-dicarboxylic acid, en = ethylenediamine), has been prepared under hydrothermal condition. X-ray diffraction analysis shows that 1 has a 3D structure with micropores (calcd. 4.074 × 6.444 Å2) along the [1 0 0] direction filled with en guest molecules. Notably, the pzdc groups connect Zn(II) cations to form a macrometallocycle as the subunit, which is further connected to generate the final framework. Additionally, the luminescent property of compound 1 has been investigated in detail.