Design Synthesis Of Cholesterol Based Gel Factors And Performance Studies

The new self-assembled organic small molecule gel soft materials have received widespread attention in recent years.The organic small-molecule gelators self-assemble to form an ordered three-dimensional network structure by balancing intermolecular hydrogen bonds,electrostatic interactions,ion coordination,hydrophobic interactions,π-πstacking,van der Waals forces,and other non-covalent bond forces.Thus,a large amount of organic solvent is gelled.Although the gel system mainly consists of liquid,it shows the appearance and rheology of the solid.Organic small molecule gels have unique sensitivity to external environmental stimuli.At the same time,the synergy and competition of various weak interaction forces among molecules make it exhibit a variety of morphologies,making it a broad application prospect.A type of smart or functional material.In this paper,two novel organic small molecule gelling agents based on cholesteryl chloride were designed and synthesized.Their gelation properties and microscopic morphology caused by external environment stimuli were studied in detail and their potential application value was studied.Made further explorations.The specific research includes the following two parts:1.The thixotropy of two-component organic small molecule gelation factor and its sensitivity to humidity.1)The use of organic synthesis methods,the design and synthesis of organic small molecule gel elements containing cholesteryl,naphthalic anhydride and adamantane;2)Gelation of the organic solvent n-propanol or n-butanol can be induced by ultrasound under the presence of α-cyclodextrin(α-CD).At the same time,the 1a/α-CD gel has thixotropic and water-sensitive properties,and a small amount of water can induce rapid collapse of the gel;3)Electron microscope,nuclear magnetic,spectrograph and other chemical instruments are used to study the related properties of the two gel factors and their assembly and collapse mechanism,and their potential application value is explored.2、 organic small molecule gel ion responsiveness and intensity of research.1)Cholesteric and terpyridine were used as raw materials to design and synthesize an ion-responsive gel factor.By using the hydrophobic effect of the cholesteryl group and the hydrogen bonding provided by the amide bond in the molecule,a highly ordered Three-dimensional nanostructured materials;2)At the same time,due to the coordination effect of terpyridine,the gel has a unique response to different metal ions.The changes of the microstructure and packing of the gel by chemical instruments such as electron microscope and ultraviolet fluorescence spectrometer,as well as the spectral properties research.