Shen, Wenbo; Liu, Jiaoshi; Du, Bin; Zhuo, Haitao; Chen, Shaojun published an article in 2021. The article was titled 《Thermal- and light-responsive programmable shape-memory behavior of liquid crystalline polyurethanes with pendant photosensitive groups》, and you may find the article in Journal of Materials Chemistry A: Materials for Energy and Sustainability.Synthetic Route of C3H7BrO The information in the text is summarized as follows:
In this study, a liquid crystalline polyurethane that exhibits thermal- and light-responsive programmable shape-memory behavior was prepared via the quaternization reaction between a mesogenic azobenzene compound and a conventional polyurethane (PU). In the film, the variation in the configuration of mesogenic azobenzene units afforded the internal stress to actuate the motion of the polymer chains and induced the chains to adopt a coiled conformation, leading to the macroscopic deformation of the film under light stimulation. The hard segments of PU provided the skeleton that froze the conformation of the polymer chains and ensured that the temporary shape was maintained after removing the stimuli. The variation of the tensile stress required for maintaining the elongation of the film under different stimuli was measured, and a possible mechanism for the multiple stimuli-responsive shape deformation of the material from the point of view of the evolution of polymer chain conformations was also discussed. Moreover, flexible photomech. devices based on the liquid crystalline polyurethane film were fabricated, and the soft devices could catch an object even in the absence of stimuli. This work can provide a creative route for the fabrication and practical application of novel photomech. devices and soft robotics more in line with the requirements of energy-saving and intelligence. After reading the article, we found that the author used 3-Bromopropan-1-ol(cas: 627-18-9Synthetic Route of C3H7BrO)
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.Synthetic Route of C3H7BrO
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