10.1002/adfm.201103147
The research focuses on the development of a new family of cationic charged biocompatible hybrid hydrogels, based on arginine unsaturated poly(ester amide) (Arg-UPEA) and Pluronic diacrylate (Pluronic-DA), which were fabricated through UV photocrosslinking in an aqueous medium. The purpose of this study was to improve the cellular interactions of synthetic hydrogels for potential biomedical applications by introducing cationic Arg-UPEA, which possesses biocompatibility and cationic properties. The conclusions drawn from the research indicate that the incorporation of Arg-UPEA into Pluronic-DA hydrogels significantly enhanced cell attachment, proliferation, and viability of both Detroit 539 human fibroblasts and bovine aortic endothelial cells. The chemicals used in the process include Pluronic F127, acryloyl chloride, triethylamine, Irgacure 2959 (as a photoinitiator), L-arginine, p-toluenesulfonic acid monohydrate, fumaryl chloride, ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, and p-nitrophenol, among others. These chemicals were utilized in the synthesis of the hydrogel precursors and for the characterization of their physicochemical properties.
10.1039/c39820001147
The research aimed to synthesize a new water-soluble singlet oxygen probe, which is crucial for studying the formation and biological implications of singlet oxygen in aqueous media. The researchers synthesized a dihydroisobenzofuran derivative, specifically the potassium salt of (4,7-dihydro-5,6-dimethylisobenzofuran-1,3-diyl)bis(benzene-p-decanoic acid), known as DIBA. This compound was designed to overcome the limitations of previous water-soluble singlet oxygen traps, which had strong absorption in the visible region, complicating kinetic studies. The study concluded that DIBA is a suitable probe for singlet oxygen due to its rapid bleaching upon reaction, and the involvement of superoxide radicals in the bleaching process was indicated by the change in reaction rate in argon-saturated and deuteriated water solutions. Key chemicals used in the synthesis process included hematoporphyrin (HP) as a photosensitizer, and various reagents in the multi-step synthesis scheme such as EtO2C[CH2]2COCI, H2, Pd-C, MeCO2H-HCl, fumaroyl chloride, AlCl3, and KOH-EtOH.