Construction of a cobalt coordination polymer based on a linear ligand with flexible branched chains

A cobalt coordination polymer based on a linear ligand with flexible branched chains 4,4′-(2,5-dibutoxy-1,4-phenylene)dipyridine (BPDP), namely, {[Co(BPDP)(H 2 O) 4 ]·2BPDP·2NO 3 } n , is obtained and characterized by the elemental analysis and single crystal X-ray diffraction. The UV-Visible spectral features are also investigated in details.