“Click chemistry” as a versatile route to synthesize and modulate bent-core liquid crystalline materials
作者:Nélida Gimeno、Rafael Martín-Rapún、Sofía Rodríguez-Conde、José Luis Serrano、César L. Folcia、Miquel A. Pericás、M. Blanca Ros
DOI:10.1039/c2jm33612j
日期:——
Three series of bent-shaped compounds containing the 1,2,3-triazole ring in the central core of the molecule have been prepared by the most extended âclick chemistryâ reaction, the copper-catalyzed azide-alkyne cycloaddition (CuAAC). This research demonstrates the versatility of this synthetic approach with the aim of achieving innovative compact supramolecular organizations. The appropriate combination of the 1,2,3-triazole synthon linked either to a methylene unit (series M) or to a methylenoxycarbonyl block (series MC) has allowed the induction of a variety of non-classical bent-core liquid crystal phases versus the classic mesophases promoted by 1,4-diphenyl-1,2,3-triazole derivatives (series T). Through a suitable selection of common lateral structures connected by âclick chemistryâ both the transition temperatures and mesomorphism, ranging from lamellar to columnar or B4-like supramolecular liquid crystalline organizations, can be tuned.
通过最广泛的 "点击化学 "反应--铜催化叠氮-炔环加成反应(CuAAC),制备出了分子中心含有1,2,3-三唑环的三个系列弯曲状化合物。这项研究展示了这种合成方法的多功能性,旨在实现创新的紧凑型超分子结构。将 1,2,3-三唑合物与亚甲基单元(M 系列)或亚甲基烯氧羰基嵌段(MC 系列)适当结合,可诱导出多种非典型弯曲核液晶相,而 1,4-二苯基-1,2,3-三唑衍生物(T 系列)则可促进经典介相。通过适当选择由 "点击化学 "连接的常见横向结构,可以调整从片状到柱状或类似 B4 的超分子液晶组织的转变温度和介观形态。