Study On Adsorption Of Terephthaloylchloride Bridged Bis(Î'-cyclodextrin) And Its Research On Coordination Of The Object

Cyclodextrin(CD), is a kind of ring compounds. By end of glucopyranose ring. After the first generation of crown ether molecules were studied, cyclodextrin become the second generation of new host compounds. The ring in the hydrophobic cavity in the solution and many kinds of inorganic, organic and biological molecules to form inclusion complexes. So it is widely used in molecular recognition, molecular assembly, mimic enzyme and many other fields. However, the inclusion of cyclodextrins with natural object is relatively weak, even a simple modification of the natural cyclodextrins side arm connected to a functional group is also difficult to have significantly improved, so that the research on the type of enzyme was blocked, So after the two cyclodextrin unit and the different functional groups or specific bridge chain groups with two cavity of cyclodextrin inclusion with may be involved with the object size and shape similar to the role, and greatly improve the ability of parent cyclodextrin inclusion of guest molecules and selectivity.Therefore, this paper mainly studies on the synthesis of benzene two benzoyl chloride bridged cyclodextrin and Its Application Study of uranyl adsorption of dye molecules, and study its molecular recognition. Can be divided into the following four aspects of work:1. Study on molecular recognition of cyclodextrin on the synthesis method of the history, basic structure and some of its derivatives of cyclodextrins and cyclodextrin derivatives were summarized, and made a brief introduction of the general direction and content of the project and together.2. The use of cyclodextrin derivatives of cyclodextrins and two of benzene chloride was prepared by the reaction of 1,4- two carboxamide phenyl bridged cyclodextrin, by means of 1HNMR, UV and IR, the structure and elemental analysis methods of the objective products were characterized, in determining the reliability of synthetic product. The results showed that the infrared spectra of absorption peak, in addition to beta cyclodextrin skeleton, also appeared in the amino benzene and the functional group obviously, the NMR chemical shifts of points, according to the peak value can roughly determine their bridged cyclodextrins, measured the elemental analysis data(C92H144O70N2·8H2O). With the theoretical value. For the synthesis of bridged cyclodextrins by this method is more reasonable, and the preparation process is simple and feasible, the yield can also be.3. Application of 1,4- two prepared by formamide benzene bridged cyclodextrin as adsorbent, the adsorption behavior and mechanism of uranyl ion. In p H=5, temperature 35 ℃, the concentration of 25mg/L, shaking time is 15 min, the theoretical maximum adsorption capacity of bridged cyclodextrins of uranyl ion was 8.72 mg/g. In Fe3+, Al3+, Ca2+, Zn2+, Fe2+ for the adsorption of uranyl ions, almost no effect.4. The object of the dye molecule compounds prepared bridged cyclodextrins and several main compounds with different shape and electron density were determined by fluorescence titration of 25 degrees in the phosphate buffer solution(p H=7.20) in the inclusion complexation stability constant of KS. Natural and modified cyclodextrin and the model object inclusion complexation only lower binding constant. However, bridged cyclodextrins compared with inclusion stability constants of TNS, ANS, AR, NR, and Rh B of the several common dye molecules is increased by 3.3, 15.3, 2.2, 12.5 and 5.8 times. Back from the host guest matching relation and recognition mechanism of deep discussed bridged cyclodextrins of dye molecules bond.