Synthesis, Crystal Structure, and Properties of a Zn(II) Coordination Polymer from a New Semirigid Tripodal Nitrogen-Containing Heterotopic Ligand

A new coordination polymer, namely, {[Zn(DTPP)(H₂O)₂]·H₂O}_n (H₂DTPP = 3-(3,5-di(2H-tetrazol-5-yl)phenoxy)pyridine, compound 1), was successfully assembled by using a new semirigid tripodal nitrogen-containing heterotopic ligand and characterized by single-crystal X-ray diffraction, elemental analysis, infrared spectroscopy, TG, and luminescence. X-ray single-crystal diffraction analysis revealed that compound 1 crystallizes in an orthorhombic crystal system with space groups of Ibca. It is a 2D coordination network with (4·8²) topology, and the 2D networks are further connected by hydrogen bonds between coordinated water molecules and tetrazole N atoms to form a 3D supramolecular framework. Moreover, compound 1 exhibits intense blue emission centered at 345 nm upon excitation at 276 nm and has the ability to sense Fe³⁺ via photoluminescence quenching.

Graphical Abstract

A new coordination polymer synthesized from a new semirigid tripodal nitrogen-containing heterotopic ligand, {[Zn(DTPP)(H₂O)₂]·H₂O}_n, was characterized.