Insights into the reaction of chondroitin sulfate with glycidyl methacrylate: 1D and 2D NMR investigation. (15th November 2022)

• Record Type: Journal Article
• Authors: Di Muzio, Laura; Paolicelli, Patrizia; Trilli, Jordan; Petralito, Stefania; Carriero, Vito Cosimo; Brandelli, Chiara; Spano, Mattia; Sobolev, Anatoly Petrovich; Mannina, Luisa; Casadei, Maria Antonietta
• Is Part Of: Carbohydrate polymers. Volume 296(2022)
• Publication Date: 2022-11-15
• Subjects: Chondroitin sulfate methacrylate -- 2D-NMR -- Glycosaminoglycans -- Transesterification -- Epoxy ring-opening; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2022.119916
• Languages: English
• ISSNs: 0144-8617

Abstract

Abstract: Chondroitin sulfate methacrylate (CS-MA) is a semisynthetic biopolymer increasingly used for the fabrication of chemical hydrogels. In this study, the methacrylation reaction of native CS was carried out with glycidyl methacrylate in dimethyl sulfoxide and optimized to obtain tunable and reproducible methacrylation degrees in a short reaction time. The methacrylation reaction was deeply characterized by mono- and bi-dimensional (1D, 2D) NMR spectroscopy of CS-MA derivatives with different methacrylation degrees. In contrast to what previously reported in the literature, HSQC, HMBC and TOCSY analyses revealed that the methacrylation reaction proceeds via both epoxy ring-opening and transesterification, involving predominantly the primary hydroxyl groups of CS, while preserving sulfate and carboxyl groups of the biopolymer. These findings are of fundamental importance for appropriate and rational design of CS-MA-based biomaterials. Graphical abstract: Unlabelled Image