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The Synthesis And Application Of Fluorescent Sensors Based On The The Rhodamine And Coumarin

Posted on:2015-07-13Degree:MasterType:Thesis
Country:ChinaCandidate:M DuFull Text:PDF
GTID:2181330467454803Subject:Organic Chemistry
Abstract/Summary:PDF Full Text Request
Supramolecular chemistry is a discipline of molecular aggregates of the role ofnon-covalent bond formed between molecules. One of the basic functions ofsupramolecular systems is molecular recognition. As an important component of thesupermolecular chemistry, The fluorescence molecular probe has developed rapidly andbecome interest of the chemists. In this dissertation the functional design and themolecular recognition of rhodamine and coumarin fluorescent probe were studieddeeply according to the trend in this field.A fluorescent probe1with thiophenols groups linked by rhodamine B wasdesigned and nuclear magnetic resonance (1H NMR、13C NMR)to determine themolecular structure. It was found that this probe exhibit fluorescence enhancementresponse to Cu2+and1-Cu2+has high selectivity and sensitivity in pure andCH3CN/H2O(9:1,v/v, pH=5.5) The titration experiments Job’s plot of the complexformed by[Cu2+]/[1-Cu2+] indicated that the complexation proportion is1:1.A fluorescent probe2with two coumarin groups linked by carbonyl groupdesigned and nuclear magnetic resonance (1H NMR、13C NMR)to determine themolecular structure. The experiments shown that a linear quenching of fluorescenceintensity in the presence of water in the organic solvents can be useful as an opticalsensor for determination of water contents in these solvents in the range0-50%.
Keywords/Search Tags:fluorescent sensor, rhodamine, coumarin, ions, recognition
PDF Full Text Request
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