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Cyclodextrin supramolecular Applied Research in electroanalytical chemistry

Author: WangXiaoLei
Tutor: SunTianZuo；ZhangGuoRong
School: Shandong Normal University
Course: Analytical Chemistry
Keywords: Supramolecular Chemistry Cyclodextrin Chemically modified electrode
CLC: O657.15
Type: Master's thesis
Year: 2000
Downloads: 282
Quote: 1
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Abstract


Supramolecular chemistry is an emerging interdisciplinary cross - frontier , it involves all the disciplines of chemical sciences , biochemistry and materials science . Supramolecular chemistry is an effective means to solve the selectivity problem that has been plagued by chemical workers , and therefore , their theory has been a huge development. Especially in the analysis of chromatographic and optical study of the most common. In electroanalytical chemistry , supramolecular chemistry has been neither widespread attention . Only in recent years , research in this area began to rise and become one of the topics at the forefront of Electroanalytical Chemistry Research . This article is based on cyclodextrin - a typical host molecules in supramolecular systems as the main object of study for the first time the use of cyclodextrin with ferrocene to form a stable supramolecular inclusion nature will exceed introduction of molecular inclusion complex carbon paste electrode made ??of β-cyclodextrin - ferrocene inclusion complex modified carbon paste electrode . The electrode with ferrocene modified carbon paste electrode performance comparison experiments prove cyclodextrin (β-CD) as the electro-active substances - ferrocene clathrate host molecules , which can effectively prevent the oxidation of the ferrocene loss of state , improving the stability and reproducibility of the electrode . This electrode can be used for the determination of ascorbic acid and the electrode mechanism , with satisfactory results . Β-CD and epichlorohydrin crosslinked polymer ( β -CDP ) is synthesized in the strong alkaline medium , the polymer has better solubility compared with the β-CD , and the use of β - CDP with glutaraldehyde the nature of the polycondensation reaction occurs in an acidic medium , supramolecular Inclusion of a water - soluble β-CDP , with methylene blue , and the first enzyme is immobilized on the electrode, made ??of a horseradish peroxidase biosensor . By infrared spectroscopy confirmed the occurrence of the polycondensation reaction , and the inclusion reaction . Original easily soluble in water , due to the generation of Supramolecular Inclusion electron transfer mediator - methylene blue fixed on the electrode , effectively reducing its loss , improve the stability and life of the biosensor to obtain the expected results . The sensor can be used for hydrogen peroxide determination .

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CLC: > Mathematical sciences and chemical > Chemistry > Analytical Chemistry > Instrument analysis ( physics and physical chemistry ) > Electrochemical analysis > Potential analysis and ion-selective electrode analysis
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