A Cerium Organic Framework with {Cu₂I₂} Cluster and {Cu₂I₂} Chain Modules: Structure and Fluorescence Sensing...

Area of Science:

• Materials Science
• Inorganic Chemistry
• Nanotechnology

Background:

• Coordination polymers (CPs) offer tunable structures and properties.
• Luminescent materials are crucial for sensing applications.
• Developing sensitive and selective sensors for biomolecules and explosives remains a challenge.

Purpose of the Study:

• To synthesize and characterize a novel copper iodine coordination polymer.
• To investigate the luminescent properties of the synthesized CP.
• To evaluate the potential of the CP as a fluorescent sensor for specific analytes.

Main Methods:

• Synthesis of the coordination polymer [(Cu2I2)2Ce2(INA)6(DMF)3]·DMF (1).
• Structural characterization using X-ray diffraction.
• Temperature-dependent fluorescence spectroscopy to study luminescence mechanisms.
• Fluorescence sensing experiments for cysteine and trinitrophenol (TNP).

Main Results:

• A 3D coordination polymer incorporating {Cu2I2} clusters and Ce3+ ions was successfully synthesized.
• Compound 1 displays uncommon red fluorescence with emission centered at 650 nm (near-infrared).
• The material demonstrated high sensitivity and selectivity as a fluorescent sensor for cysteine and TNP.

Conclusions:

• The synthesized copper iodine coordination polymer exhibits promising near-infrared luminescence.
• Compound 1 shows significant potential for developing advanced fluorescent sensors for biothiols and explosive detection.
• This work highlights the utility of coordination polymers in designing functional materials for security and biomedical applications.