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Silicate-Phenolic Networks: Coordination-Mediated Deposition of Bioinspired Tannic Acid Coatings
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).ORCID iD: 0000-0001-9409-2601
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Number of Authors: 52019 (English)In: Chemistry - A European Journal, ISSN 0947-6539, E-ISSN 1521-3765, Vol. 25, no 42, p. 9870-9874Article in journal (Refereed) Published
Abstract [en]

Surface modification with polyphenolic molecules has been pursued in biomedical materials owing to their antioxidant, anti-inflammatory, and antimicrobial characteristics. Recently, the use of silicic acid (Si-aq) as a mediator for efficient surface deposition of tannic acid (TA) was reported, but the postulated Si-TA polymeric networks were not characterized. Herein, we present unambiguous evidence for silicate-TA networks that involve Si-O-C motifs by using solid-state NMR spectroscopy, further supported by XPS and ToF-SIMS. By using QCM-D we demonstrate the advantages of Si-aq, compared to using transition-metal ions, to improve the coating efficiency under mildly acidic conditions. The presented homogenous coating buildup and validated applicability in inorganic buffers broadens the use of TA for surface modifications in technological and biomedical applications.

Place, publisher, year, edition, pages
2019. Vol. 25, no 42, p. 9870-9874
Keywords [en]
coordination polymers, polyphenols, surface chemistry, tannic acid, silicate complexation, thin films
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:su:diva-170807DOI: 10.1002/chem.201902358ISI: 000474020900001PubMedID: 31132189OAI: oai:DiVA.org:su-170807DiVA, id: diva2:1339575
Available from: 2019-07-30 Created: 2019-07-30 Last updated: 2019-12-03Bibliographically approved

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