Structurally Engineered Cu(II)-4-Chloro-2-nitrobenzoate-Picoline Complexes Immobilized in PVA/Cellulose Composite...

Area of Science:

• Materials Science
• Coordination Chemistry
• Biotechnology

Background:

• Development of novel materials for catalysis and antimicrobial applications is crucial.
• Immobilization of metal complexes offers enhanced stability and recyclability.
• Poly-(vinyl alcohol)-cellulose (PVA-CE) matrices provide a sustainable platform for material integration.

Purpose of the Study:

• To synthesize and characterize two new Cu(II) complexes.
• To immobilize these complexes into PVA-CE matrices.
• To evaluate the catalytic and antibacterial properties of the resulting hybrid materials.

Main Methods:

• Synthesis and structural evaluation of Cu(II) complexes using single-crystal X-ray diffraction (SCXRD).
• Immobilization into PVA-CE matrices via solution casting.
• Characterization using UV-Vis, FT-IR, PXRD, SEM, and AFM.
• Evaluation of catalytic activity (oxidase-mimetic) and antibacterial efficacy.

Main Results:

• Structurally characterized isomeric Cu(II) complexes [Cu-(4C2N-Bz)2(β-pic)2(H2O)2] (1) and [Cu-(4C2N-Bz)2(γ-pic)2(H2O)2] (2).
• Successfully prepared hybrid blends PC1 and PC2 with uniform dispersion and strong interfacial interactions.
• Hybrid materials exhibited enhanced tensile strength, negligible copper leaching, and excellent recyclability.
• Demonstrated significant oxidase-mimetic activity and potent antibacterial inhibition efficiency.

Conclusions:

• The study successfully developed sustainable hybrid materials based on immobilized Cu(II) complexes.
• The hybrid materials show excellent mechanical stability, reusability, and promising catalytic and antibacterial performance.
• Findings highlight the potential of these materials for dip-catalytic and antimicrobial applications.