A homochiral Cu(II) coordination polymer built from helical motif based on two V-shaped ligands

• A homochiral Cu(II) coordination polymer has been synthesized and characterized.
• This chiral complex was constructed by two achiral V−shaped ligands.
• The topology of this 3D complex represents a simple yet unreported 75∙8 topology.

By using a V-shaped N-containing ligand and a V-shaped carboxylate ligand, we have successfully synthesized a 3D novel copper homochiral coordination polymer, namely [Cu(OPY)(1,3-bdc)]n (complex 1), [1,3-H2bdc = isophthalic acid, OPY = 4,4′-(oxybis(4,1-phenylene))dipyridine]. The compound has been solvothermally synthesized and characterized by IR, elemental analysis, single crystal X-ray diffraction, XRD, UV–vis, and TG analysis. The complex 1 crystallizes in the chiral space group P65 and possesses an unprecedented uninodal 3D 75∙ 8 topology. However, the complex was synthesized by achiral materials. The complex 1 displays a moderate SHG response and its SHG efficiency is about 0.3 times that of urea. In addition, the compound shows high thermal stability.

A 3D non-interpenetrated chiral coordination polymer [Cu(OPY)(1,3-bdc)]n has been solvothermally synthesized by using V-shaped N-containing and multi-carboxylate ligands simultaneously without any chiral precursors. The structure of the complex is composed by the exclusively left-handed helical chains and each single chain is generated around the crystallographic 65 axis with a long pitch of 27.99 Å.Figure optionsDownload as PowerPoint slide