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Construction and Characterization of Supramolecular Assembly Based on Ionic Self-Assembly and Cyclodextrins Inclusion

Author: LvChao
Tutor: ChenXiao
School: Shandong University
Course: Colloid and Interface Chemistry
Keywords: Supramolecular Chemistry Ionic self - assembly Cyclodextrin External stimuli responsive
CLC: O641.3
Type: Master's thesis
Year: 2011
Downloads: 30
Quote: 0
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Abstract


The supramolecular chemistry study the nature of the various non-covalent interactions, as well as the structure and function of the resulting supramolecular materials designed and constructed by these non-covalent interactions. The proper regulation of the use of the role of various non-covalent bonds (such as electrostatic attraction, hydrogen bonding, and the main object of inclusion, etc.) laws of supramolecular systems the bioinformatics field of chemistry can be achieved, including at the molecular level and supramolecular level Reproduction, transfer, build on the information is stored in the process. The supramolecular systems help to understand the role of the different non-covalent law, and further use of these laws to build a highly ordered functional supramolecular materials. The papers selected electrostatic interactions and host-guest inclusion became the main driving force of the following supramolecular structure and nature of the system, a detailed study. Using simple ion self-assembly (ionic self-assembly, ISA) method, a composite of aminoazobenzene hydrochloride (4-aminoazobenzene hydrochloride, AzoHCl) and sodium deoxycholate (1-Adamantanamine hydro-chloride, NaDC ), to prepare a stable organic nanorods. And 1H NMR, POM, TEM, SEM, LCSM, DSC / TGA, XRD, UV-vis other characterization methods to study the structure and nature of the product. Complexes of AzoHCl and NaDC stoichiometric ratio is recognized as 1:2, by the molecule of AzoHCl and two molecules of NaDC building units to static electricity and hydrogen bonding interactions, respectively, indicating that in addition to the electrostatic interactions in the ISA, other non valence bond also play an important role. The ordered aggregation structure having excellent crystallinity, can stimulate fluorescence confocal fluorescence can be observed under the microscope to a clear fluorescence image. Under the excitation of the laser light source, obtain a stable fluorescence spectroscopy. Through the introduction of a simple method of ISA with certain functional groups to build a unit, the function of the structure and the nature of the material has the required type of a reference design for the construction and application of functional nanomaterials. 2, using the the simple ISA compound sodium desoxycholic acid (sodium deoxycholate, NaDC) and 1 - adamantyl ammonium chloride (1-Adamantanamine Hydro-chloride, ADCl), prepared organic single crystal, obtained by single-crystal analytical methods a the ISA product of precise molecular arrangement. In addition, cyclodextrin the three yuan thermal supramolecular system. Cyclodextrin and adamantane and its derivatives can form stable inclusion complex the inclusion constant up to 104-10'M-1. Enthalpy-driven package knot balance of temperature-sensitive to build thermal supramolecular system possible, and here the experimental results show that this possibility. Ternary supramolecular systems can be provided at 5 ℃ to clarify transparent solution, and stable for more than three months; heated to 25 ° C or higher temperature of the thermal system, by the balance of failure envelope junction thereby destroying the supramolecular amphiphilic precipitation without cyclodextrin binary single crystal. In this study the use of the ISA and cyclodextrin inclusion the knot two kinds of non-covalent interactions as the main driving force, in collaboration with other non-covalent interactions thermal supramolecular systems design assembly has certain references to for building external stimuli responsive supramolecular systems . In addition, the introduction of the salt effect try to cultivate in the single crystal of the ISA system, also have a certain reference value of single-crystal culture.

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Structural Chemistry > Molecular interactions,supramolecular chemistry
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