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Melon Ring Induced By Caffeine At Room Temperature Phosphorescence And Its Interaction With The Triphenylmethane Compounds

Posted on:2008-08-05Degree:MasterType:Thesis
Country:ChinaCandidate:F ChangFull Text:PDF
GTID:2191360215466589Subject:Applied Chemistry
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In recent years, chemical or supramolecular chemistry as a subject and the object of a study destination, by the increasingly widespread concern. Supramolecular chemistry is the study of two or more chemical species through the interaction between molecules and the formation of association with a higher Minute Miscellaneous of organized entities, research supramolecular or supramolecular structure of the formation, nature and application of the chemical. In host-guest chemistry, the people of crown ether, cyclodextrin, Calixarenes made a lot of research, With a new type of cage-like compounds - Guanajuato in Central and its homologue the emergence, which has a good and rigid hydrophobic cavity. Central to make melons can be loaded into various size and varied nature of the molecular containers, so that the object or molecular ring in the home port self-assembled molecular capsule or capsule shell elements. In a different part of the main home of host-guest chemistry, supramolecular chemistry research reports have been increasing year after year. Macrocyclic compounds based on the object elements parcel, Cline Love year after year. Macrocyclic compounds based on the object elements parcel, Cline Love is such a meaningful analysis of cyclodextrin (CD) induced room temperature phosphorescence (RTP). CD-RTP with other phosphorescence compared with the following advantages : simple, rapid and foaming system is not easy, by oxygen quenching small role in a wide linear range, precision, selectivity, and so on. But its relatively large amount, pH narrower. Based on the above background, this paper Guanajuato Central induced caffeine, in order to achieve the phosphorescence. The results show; Guanajuato Central induced caffeine, the heavy atom t-butyl chloride, deoxidants the presence of sodium sulfite to produce strong phosphorescence, compared with the CD, Guanajuato Central cyclodextrin small compared with 3-4 orders of magnitude.Under such background, the author chooses three triphenylmethane dyes, namely Methyl Green (ge1),Iodide-malachite Green (ge2),Methyl Violet (ge3) and reviews the mutual active force between cucurbiturils, UV- absorption spectroscopy and fluorescence Spectroscopy and calculates the stabilization constant. This study shows: cucurbiturils (Q[6]) -ge(1-3)systems are not fitted to binding model ;Q[7]-ge(1-2) systems are all fitted to a 1:1 binding model respectively; Q[8]-ge(1-3) systems are all fitted to a 1:2 binding model respectively. In the last, the paper use UV- absorption spectroscopy measure cucurbit[n=6-8]urils with Methyl Green (ge1),Iodide-malachite Green (ge2),Methyl Violet (ge3) recovery ratio linear range and detection limit. The experimental results reveal that the recovery ratio is between 96.8% and 104.2%.The result is ideal.
Keywords/Search Tags:Cucurbit(n=6.7.8)urils, Triphenylmethane dyes, UV-Visible absorption spectroscopy, Fluorescence Spectroscopy, Interaction, Room phosphorescence
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