The author of 《Photo-Cross-Linkable Coumarin-Based Poly(ε-caprolactone) for Light-Controlled Design and Reconfiguration of Shape-Memory Polymer Networks》 were Defize, Thomas; Thomassin, Jean-Michel; Ottevaere, Heidi; Malherbe, Cedric; Eppe, Gauthier; Jellali, Rachid; Alexandre, Michael; Jerome, Christine; Riva, Raphael. And the article was published in Macromolecules (Washington, DC, United States) in 2019. Name: 3-Bromopropan-1-ol The author mentioned the following in the article:
Photochem. cross-linked shape-memory polymer (SMP) materials have been achieved by functionalizing chain-ends of star-shaped poly(ε-caprolactone) (PCL) with 7-hydroxypropoxy-4-methylcoumarin followed by photodimerization of these end-groups. The kinetics of the network formation in function of the photosensitizer concentration has been studied by swelling experiments and rheol. Thanks to the design of a dedicated homemade mold, highly reproducible irradiation conditions have been achieved allowing to study the network formation and properties, especially the shape-memory properties, in relation to the coumarin dimerization degree as determined by Raman spectroscopy. In optimized conditions, PCL-based SMP materials exhibiting high fixity and recovery have been achieved in remarkably short irradiation time, typically 5 min. In addition, the precise control of the network cross-link d. with the irradiation time, so as the high stability of the formed networks toward temperature variations was also demonstrated allowing the fine-tuning of the network properties by the irradiation process. Finally, the reversible character of the coumarin dimerization under light irradiation of appropriate wavelength has been quantified by Raman spectroscopy. The dimer photocleavage allows the photoreconfiguration of the networks offering the ability to modify the “”permanent”” shape of the SMP material, while preserving the excellent shape-memory properties. In the experiment, the researchers used 3-Bromopropan-1-ol(cas: 627-18-9Name: 3-Bromopropan-1-ol)
3-Bromopropan-1-ol(cas: 627-18-9) is used in the synthesis of fluorescent halide-sensitive quinolinium dyes, chiral, quaternary prolines through cyclization of quaternary amino acids and molten salt-polymers. It is utilized for the study of micellar media and in microemulsions based on cationic or a nonionic surfactant by reacting with phenols.Name: 3-Bromopropan-1-ol
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts