| Macroscopic visual molecular recognition has been a hot topic in the host-guest chemistry. The commons of visual molecular recognition are mainly gel gathering, color visual and wettability, etc.. But there is some shortcoming about these macro-responsive. For example, gel-system, it is not sure the existing host/guest molecules of the interaction. Gold nano-particle is easily gather together when the process of preparation. So, we should construct a new interface of molecular recognition system. The characteristic of calixarene and pillarene has made them be good host molecular. According to the early stage study of functional surface of calixarene and their molecular recognition performance, we envisaged if a more direct specific molecular macro visual recognition can come true, namely, we utilized the fuctional surface to interact with guest water drop, and realize the macro-responsive of specific molecule. The details are:Firstly, because of the size and structure of methomyl, we design and synthsize alkynyl-calix[4]arene, the alkynl was regarded as fixed unit and through clicking reaction modified on the silicon surface, the cavity of calix[4]arene was regarded as recognition uint. The calix[4] modified functional surface recognized methomyl by dynamic contact angle. Therefore, we based on the feature of specific molecule to design a series of host molecules, then modifying these host molecules on the surface and interacting with guest water drop.Secondly, based on the structural characteristics and properties of the paraquats, we sythsize a new pillar[5]arene, the low rim of pillar[5] was derived alkynyl and modified on the silicon surface, the cavity of pillar[5]was regarded as recognition unit. We can conclude the pillar[5] modified silicon surface can recongnize methyl paraquat through dynamic contact angle.Thirdly, we synthesize a chiral calix[4]arene and modified it on the silicon surface through click reaction. The chiral surface can recognize S-naproxen. When the R/S-naproxen solvent were added on the chiral surface, after the solvent evaporated the surface was left different R/S-naproxen crystallization. We found the chiral surface can control the enantiomer crystallization. |
