Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

New SiO2/Caffeic Acid Hybrid Materials: Synthesis, Spectroscopic Characterization and Bioactivity

Version 1 : Received: 29 December 2019 / Approved: 29 December 2019 / Online: 29 December 2019 (13:30:41 CET)

A peer-reviewed article of this Preprint also exists.

Catauro, M.; Barrino, F.; Dal Poggetto, G.; Crescente, G.; Piccolella, S.; Pacifico, S. New SiO2/Caffeic Acid Hybrid Materials: Synthesis, Spectroscopic Characterization, and Bioactivity. Materials 2020, 13, 394. Catauro, M.; Barrino, F.; Dal Poggetto, G.; Crescente, G.; Piccolella, S.; Pacifico, S. New SiO2/Caffeic Acid Hybrid Materials: Synthesis, Spectroscopic Characterization, and Bioactivity. Materials 2020, 13, 394.

Journal reference: Materials 2020, 13, 394
DOI: 10.3390/ma13020394

Abstract

Sol-gel route represents a valuable technique to obtain functional materials, in which organic and inorganic members are closely connected. Herein four hybrid materials, containing caffeic acid entrapped in a silica matrix at 5, 10, 15 and 20 wt%, were synthesized and characterized through FT-IR and UV-Vis spectroscopy. FT-IR analysis was also performed to evaluate the ability to induce the hydroxyapatite nucleation. Despite some structural changes occurred on the phenol molecular skeleton, hybrid materials showed scavenging properties vs DPPH and ABTS+ radicals, which was dependent on the tested dose and on the caffeic acid wt%. Finally, the SiO2/caffeic acid materials have been proposed as valuable antibacterial agents against Escherichia coli and Enterococcus faecalis.

Subject Areas

caffeic acid; sol-gel technique; FT-IR spectroscopy; radical scavenging capacity; antibacterial activity

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