Synthesis, structure and luminescence properties of a three-dimensional Cd(II) coordination polymer with (3, 7)-connected topology

Abstract

Solvothermal reaction of 2,5-thiophenedicarboxylic acid and 3,5-bis(imidazol-1′-yl)pyridine with cadmium nitrate provided a new coordination polymer, namely {[Cd₂(tdc)₂(bimpy)](2H₂O)(2DMF)}_n (1) where H₂tdc = 2,5-thiophenedicarboxylic acid, and bimpy = 3,5-bis(imidazol-1′-yl)pyridine. The compound has been structurally characterized by single-crystal X-ray diffraction analyses and further characterized by elemental analyses, IR spectroscopy, powder X-ray diffraction, and thermogravimetric analyses. Crystallographic data show that the compound crystallizes in the monoclinic P2₁/n space group and exhibits an interesting three-dimensional network comprising binuclear Cd(II) structural unit, which could be described as a (3,7)-connected topology. At room temperature, compound 1 exhibits strong fluorescence emission in the solid state.

GRAPHICAL ABSTRACT

KEYWORDS:

• 2,5-thiophenedicarboxylic acid · 3,5-bis(imidazol-1′-yl)pyridine · coordination polymer · crystal structure · luminescent property

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [grant number 21671094].