New Quaternary Ammonium Derivatives Based on Citrus Pectin.

Area of Science:

• Polymer Chemistry
• Materials Science
• Biochemistry

Background:

• Citrus pectin is a natural polysaccharide with potential for chemical modification.
• Developing novel functionalized polysaccharides is crucial for advanced material applications.
• Antimicrobial properties of pectin derivatives are of significant interest.

Purpose of the Study:

• To synthesize novel citrus pectin derivatives with quaternary ammonium groups.
• To characterize the synthesized pectin derivatives using various analytical techniques.
• To investigate the antimicrobial activity and aggregation behavior of these new polymers.

Main Methods:

• Polysaccharide derivatization using N,N-dimethyl-N-alkyl amine and epichlorohydrin.
• Structural characterization via elemental analysis, FTIR, and NMR spectroscopy.
• Viscometric behavior, aggregation, and morphology studied using capillary viscometry, DLS, fluorescence spectroscopy, and AFM.

Main Results:

• Successful synthesis of pectin derivatives with pendant quaternary ammonium groups.
• Characterization confirmed the successful incorporation of functional groups.
• Pectin derivatives formed aggregates in aqueous solution, with morphology dependent on lipophilicity.
• All synthesized polymers demonstrated antimicrobial activity against Staphylococcus aureus and Candida albicans.

Conclusions:

• Novel pectin derivatives with tunable properties were successfully synthesized.
• These derivatives exhibit promising antimicrobial activity, suggesting potential uses as biocides.
• The study highlights the versatility of pectin as a scaffold for developing functional materials.