Potential Application Values of Two Multicoloured Coordination Compounds as Multicolor Luminescent Materials

Area of Science:

• Coordination Chemistry
• Materials Science
• Luminescence

Background:

• Multifunctional ligands are crucial for designing novel coordination compounds.
• Cobalt-based coordination compounds exhibit diverse properties and applications.
• Fluorescent materials are essential for advanced optical and sensing technologies.

Purpose of the Study:

• To synthesize and characterize two new cobalt(II)-based coordination compounds using 2-aminopyrimidine-5-carboxylic acid (Hapc).
• To investigate the fluorescence properties of the synthesized compounds and compare them to the parent ligand.
• To explore the potential of these compounds in creating multicolored fluorescent materials.

Main Methods:

• Synthesis of coordination compounds via reaction of Hapc ligand with Cobalt(II) nitrate hexahydrate.
• Characterization using elemental analysis (EA), single crystal X-ray diffraction (SC-XRD), thermogravimetric analysis (TG), powder X-ray diffraction (PXRD), and infrared spectroscopy (IR).
• Fluorescence spectroscopy to evaluate luminescent properties.

Main Results:

• Two cobalt(II)-based coordination compounds, {[Co(apc)2]·H2O}n (1) and [Co(apc)2(H2O)2] (2), were successfully synthesized.
• Both compounds displayed distinct green and blue fluorescence, outperforming the Hapc ligand.
• The differing fluorescence colors suggest potential for tunable multicolored emission.

Conclusions:

• The synthesized cobalt coordination compounds possess superior fluorescence properties compared to the ligand.
• The distinct fluorescence colors provide a basis for developing multicolored fluorescent materials.
• These findings open avenues for advanced applications in fluorescent materials science.