Poly(vinyl alcohol)/Chitosan Hydrogel Containing Gallic Acid-Modified Fe, Cu, and Zn Metal-Organic Frameworks (MOFs): Preparation, Characterization, and Biological Applications.

Hydrogel composites are water-swollen and three-dimensional materials that have been investigated for various biological applications, including controlled drug delivery and tissue engineering, owing to the similarity between their mechanical, electrical, and chemical properties with biological tissues. The hydrogel composites can provide a superior replication of living tissue compared to their single components. In this regard, Fe-BTC, Cu-BTC, and Zn-BTC MOFs were synthesized and modified with gallic acid (GA).