Type d’œuvre : Œuvre écrite
Titre du périodique : Crystal Growth & Design
Date de publication : Avril 2022
Résumé : We present the topochemical polymerization of two lignocellulosic biobased diacetylenes (DAs) that only differ by an alkyl spacer length of 1 methylene (n = 1) or 3 methylene units (n = 3) between the diyne and carbamate functionalities. Their crystalline molecular organizations have the distinctive feature of being suitable for polymerization in two potential directions, either parallel or skewed to the hydrogen-bonded (HB) network. However, single-crystal structures of the final polydiacetylenes (PDAs) demonstrate that the resulting orientation of the conjugated backbones is different for these two derivatives, which lead to HB supramolecular polymer networks (2D nanosheets) for n = 1 and to independent linear PDA chains with intramolecular HBs for n = 3. Thus, spacer length modification can be considered a new strategy to influence the molecular orientation of conjugated polymer chains, which is crucial for developing the next generation of materials with optimal mechanical and optoelectronic properties. [Tiré d’ACS Publications]
Polymer-packing orientations in single crystals of furfuryl-biobased polydiacetylenes
Type d’œuvre : Œuvre visuelle
Date de publication : 7 juin 2023
Lieu de diffusion : Canadian Chemistry Conference and Exhibition (CSC) à Vancouver.
Portrait de l’empilement des molécules dans un matériau intelligent
Type d’œuvre : Œuvre visuelle
Date de publication : 8 mai 2023
Lieu de diffusion : 90e congrès de l’ACFAS (colloque de l’ARC)