A new three-dimensional Zn(2+) coordination polymer constructed from oxalate and 1,2,4-triazolate

Area of Science:

• Materials Science
• Inorganic Chemistry
• Crystallography

Background:

• Coordination polymers (CPs) offer tunable structures and properties for diverse applications.
• Developing novel CPs with specific functionalities, such as sensing capabilities, is an active research area.
• Metal-organic frameworks (MOFs) and related coordination networks are of significant interest.

Purpose of the Study:

• To synthesize and characterize a new 3-D zinc-based coordination polymer.
• To investigate the structural, thermal, and photoluminescent properties of the synthesized CP.
• To evaluate the potential of the CP as a fluorescence sensor for nitrobenzene detection.

Main Methods:

• Solvothermal self-assembly method for CP synthesis.
• Single-crystal X-ray diffraction for structural analysis.
• Thermogravimetric analysis (TGA) for thermal stability assessment.
• Photoluminescence spectroscopy for optical property investigation.
• Sensing experiments using nitrobenzene (NB).

Main Results:

• A new 3-D Zn(2+) coordination polymer, [(CH3)2NH2]3[Zn6(ox)4.5(trz)6]⋅4H2O, was successfully synthesized.
• Structural analysis revealed a 3-D network constructed from 2-D layers linked by oxalate (ox) and triazolate (trz) ligands around Zn(2+) ions.
• The material demonstrated significant photoluminescence and was effective in detecting nitrobenzene (NB) at parts-per-million (ppm) concentrations.

Conclusions:

• The synthesized Zn(2+) coordination polymer exhibits a robust 3-D framework.
• The CP possesses promising photoluminescent properties suitable for sensing applications.
• This material can function as a sensitive fluorescence probe for detecting nitrobenzene (NB).