A new Cd-coordination polymer based on 1,3-di(4-pyridyl)propane: synthesis, crystal structure, thermogravimetric analysis, and photoluminescent properties

Abstract

Hydrothermal reaction of cadmium iodide (CdI₂) and 1,3-di(4-pyridyl)propane (dpp) results in the formation of the 2-D coordination polymer [Cd₂(µ-ddp)₄I₄]_n (1) where the Cd(II) ions assume octahedral I₂N₄ geometries. The dpp ligands adopt anti-anti (TT) and gauche-gauche′ (GG′) conformations. Thermogravimetric analysis reveals that 1 decomposes in two steps comprising dissociation of one dpp ligand followed by complete decomposition of the framework corresponding to the remaining three dpp ligands and iodides. Polymer 1 is luminescent at 386 nm.

Graphical abstract

Keywords:

• Cadmium-coordination polymer
• ligand conformations
• luminescence

Disclosure statement

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

Additional information

Funding

A.K. Bharati would like to express his sincere gratitude to Council of Scientific and Industrial Research (CSIR), New Delhi for financial assistance in the form of Senior Research Fellowship (SRF). Dr. Kafeel Ahmad Siddiqui is thankful to Council of Scientific and Industrial Research (CSIR), New Delhi India for the award of a project under EMR-II Sanction order No. 01(2962/18/EMR-II) to support his “Crystal Engineering Research.” MFCGS acknowledges the Fundação para a Ciência e a Tecnologia (FCT), Portugal, through project UIDB/00100/2020 of Centro de Quimica Estrutural.