《Giant Single-Crystal Shape Transformation with Wide Thermal Hysteresis Actuated by Synergistic Motions of Molecular Cations and Anions》 was published in Chemistry – A European Journal in 2020. These research results belong to Wang, Xiao-Lei; Xue, Jin-Peng; Sun, Xiao-Peng; Zhao, Yan-Xin; Wu, Shu-Qi; Yao, Zi-Shuo; Tao, Jun. Safety of Cupric bromide The article mentions the following:
Manipulating the collective mol. movements to implement macroscopic mech. response of bulk material is attractive and challenging. Here, an organic-inorganic hybrid single crystal is synthesized, which exhibits a giant macroscopic shape transformation with a remarkable thermal hysteretic feature. The colossal anisotropic shape change, which manifests as an abrupt elongation of ca. 9 % along the crystallog. c-axis and a concomitant contraction of ca. 9 % in a perpendicular direction, is induced by a significant reorientation of imidazolium, accompanied with a substantial configurational variation in CuBr42- complex anions. The synergistic motions of both the mol. cations and anions engender a remarkable large thermal hysteresis (>30 K) in the shape transformation of the single crystal, implying that this material may play a role in alternating memory media. Furthermore, due to the stable crystal lattice, a single crystal that demonstrates naked-eye detectable large shape transformation was used as a thermal actuator to spontaneously control an elec. circuit by temperature variation. The experimental process involved the reaction of Cupric bromide(cas: 7789-45-9Safety of Cupric bromide)
Some reported applications of Cupric bromide(cas: 7789-45-9) are: catalyst in cross coupling reactions; co-catalyst in Sonogashira coupling; lewis acid in enantioselective addition of alkynes.Safety of Cupric bromide
Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”