Asymmetric Monomer, Amorphous Polymer? Structure-Property Relationships in 2,4-FDCA and 2,4-PEF. Abstract The biobased polyester poly(ethylene 2,4-furanoate) (2,4-PEF) is a potentially interesting yet insufficiently studied polymer whose resistance to crystallization fundamentally stems from the asymmetric nature of the 2,4-furandicarboxylic acid monomer. A combination of vibrational spectroscopy (infrared, Raman and inelastic neutron scattering) and ab initio calculations…

Impermeáveis Abstract The search for waterproof materials has a long history and exemplifies the use of natural materials unknown in Europe before the first globalization; more recently, it uses artificial materials, benefiting from the development of Chemistry. Paulo J. A. Ribeiro-Claro. Full Article

What a difference a methyl group makes – probing choline–urea molecular interactions through urea structure modification. Abstract There is a lack of fundamental knowledge on deep eutectic solvents, even for the most extensively studied mixtures, such as the mixture of cholinium chloride and urea, which prevents a judicious choice of components to prepare new solvents….

Cores de Outono. Abstract There are colors that we naturally associate with the seasons: the colors of flowers in spring, brown in winter, the blue of the sky in summer… and this text is about the chemistry of autumn colors. Paulo J. A. Ribeiro-Claro. Full Article