| Molecular Recognition is an important area of supramolecular chemistry.Because of its characteristics, the development of anion coordination is delayedcompared with neutral molecules and cations. It is therefore necessary to constructednovel anion receptors.This dissertation consists of four chapters.In Chapter 1, Researches in the development of anion recognition were brieflyreviewed. Anion recognition has received little attention when compared to cationrecognition. However, anions play key roles in many fields, therefore a number ofsystems about anions have been reported. This chapter is literature review aboutchromogenic sensing and fluorescence sensing with anions.In Chapter 2, Some thiourea derivatives were synthesized and characterized. Theproperties of absorption spectra and association of complexes between hosts andanions were investigated and compared. Substituent effect play important roles insensing of anions.In Chapter 3, A 1:1 model complex between host and copper ion was formedand the interaction of complex with anions was investigated, result indicated that thecomplex formed three members of complex with AcO- ion and a new longwavelength peak appeared at 520 nm. Other oxygenous anions such as H2PO4-,HSO4- and ClO4- were not observed the same change. We think this is mainly becauseof the configuration structure of anions.In Chapter 4, The fluorescence Reaction of Cationic Surface-Active Agents (CS)with Alizarin Red in aqueous solution was investigated. It was found that thefluorescence quenching of Alizarin Red appears when it reacts with the cationmonomer of a CS. The reaction has a very high sensitivity, the concentration ofCTMAB in the range of 3.0×10-7-5.0×10-5 mol·L-1 obeys the linear equation, thedetection limit is 5.0×10-8 mol·L-1 and can be applied to the trace determination of CS.The fluorescence characteristics, the optimum conditions of the reaction system andthe reaction mechanism were also discussed.
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