Fluorescence Pillar[5] Arenes、Calix[4]Arenes Synthesis And Properties Studies

In recent years, functionalization of pillararenes and calixarenes has become a hotspot research of supramolecular chemistry. Design and synthesis of functionalization of the pillar[5]arene and calix[4]arene derivatives as host molecules is new study field, moreover, study its practical application in molecular recognition has important significance. Fluorescence as a method of identification, because of its simple, intuitive, and sensitive, synthesise a kind of fluorescent pillar[5]arenes and fluorescent calix[4]arenes, in a sense, using the fluorescence spectrum study their molecular identification is of great importance. As the pesticide is used great many and brought serious problems to the environmental increasingly. Therefore, the development of pesticide molecular recognition research has practical application value, and provides the theoretical basis for environmental management. In this paper, we design and synthesis of fluorescent pillar[5]arenes and fluorescent calix[4]arenes, and selective recognition of different pesticides or cations. The main contents are as follows:Firstly, we use boron trifluoride diethyl etherate as catalyst, hydroquinone, p-methoxy phenol, and paraformaldehyde as basic materials. Symmetrical and asymmetrical pillar[5]arenes were synthesized by condensation reaction. Base on the platform, synthesis of a series of fluorescent pillar[5]arene derivatives.Secondly, the novel fluorescent pillar[5]arene, P5C10, was synthesized by classical Williamson reaction, and selective fluorescent recognition toward methyl parathion.Thirdly, base on tert-butyl calix[4]arene, the lower rim with coupling groups and fluorescent groups of calix[4]arene derivatives were synthesized by Williamson reaction, and C4Q2 as selective fluorescence probe for iron ions.Finally, fluorescence calix[4]arene derivatives C4C2 was synthesized. On the surface of the silicon chip the C4C2/SAMs was builted via the click chemistry. The C4C2/SAMs was achieved the recognition of phoxim via the contact angle. Simultaneously, the C4C2 also as selective fluorescence probe for phoxim.