Research On The Assembly And Application Of Ten-membered Melon Rings

In this study,the role of supramolecular self-assembly of Q[10]has been prospectively and fundamentally studied.The recognition effect of stable compounds obtained by supramolecular self-assembly of cucurbit[10]uril on pesticide molecules was discussed and analyzed,and the action mode,structural characteristics and related thermodynamic parameters of the host-guest complex were studied.In addition,the adsorption of iodine and its related action modes and action sites were also studied.(1)The Q[10]@BER fluorescent probe was prepared by using the supramolecular self-assembly system of cucurbit[10]uril(Q[10])and berberine hydrochloride(BER).The fluorescent probe system was used to identify and detect a variety of common pesticide molecules.The Q[10]@BER fluorescent probe system and the system of detecting and identifying pesticide molecules were investigated and analyzed by using nuclear magnetic resonance spectroscopy,UV-visible absorption spectrophotometry and fluorescence spectroscopy.Results showed that the Q[10]and BER by supramolecular function built into Q[10]@BER fluorescent probes,and role than Q[10]/BER:1:1,the fluorescent probe can be selectively detected dodine and Tricyclazole,which add Dodine representation of fluorescence quenching,Dodine and BER in Q[10]cavity characterization for competition effect,action ratio of Q[10]/Dodine was 1:1;Tricyclazole was added,which was characterized as fluorescence enhancement.Tricyclazole and BER were characterized as synergistic effect in the cavity of Q[10].The action ratio of Q[10]/BER/Tricyclazole was 1:1:1.(2)The Q[10]@MeAD fluorescent probe was prepared by supramolecular self-assembly system constructed by using the cucurbit[10]uril(Q[10])and protonated acridine(MeAD).The fluorescent probe system was used to identify 15 common pesticide molecules.Nuclear magnetic resonance spectroscopy,UV-visible absorption spectrophotometry and fluorescence spectroscopy were used to explore and analyze the fluorescent probe system of Q[10]@MeAD and the system of detecting and identifying pesticide molecules with fluorescent probe.Results show that the Q[10]and MeAD through supramolecular function built into Q[10]@MeAD fluorescent probes,and action ratio of Q[10]/MeAD was 1:2,the fluorescent probe can be selectively detected Dodine,add Dodine representation of fluorescence quenching after reply,Dodine and MeAD in Q[10]cavity characterization for the competition effect,action ratio of Q[10]/Dodine was:1:1.(3)The supramolecular self-assembly system was constructed by using cucurbit[10]uril(Q[10]),1,3-bis(4-piperidyl)propane(g1)and1,3-bis(4-butylpiperazin-1-ylpropane)(g2).The two supramolecular self-assembly systems were analyzed by nuclear magnetic resonance spectroscopy,DOSY and COSY.According to ¹H NMR results,a stable compound was formed by supramolecular binding of Q[10]with g1.The action ratio of Q[10]/g1 was 1:2.The results of DOSY and COSY were consistent with those of NMR results.A stable compound was formed by supramolecular binding of the Q[10]with g2.The action ratio of Q[10]/g2 was 1:1.The results of DOSY and COSY were consistent with the results of NMR.(4)A crystalline porous coordination polymer Q[5]@Q[10]containing discrete iodide ion was prepared by using cucurbit[10]uril(Q[10]),cucurbit[5]uril(Q[5])and Rb I as raw materials.The adsorption,desorption,thermal stability,action site and mode of iodine were investigated by UV-Vis absorption spectrophotometry,thermal stability analysis and Raman spectroscopy.The results showed that the adsorption capacity of iodine was 532.5mg/g by UV-Vis spectrum analysis of the adsorption and desorption process.The thermal decomposition process of the sample can be divided into three stages by analysis of its thermal stability.The first stage is the release of water from the crystal lattice at about 100?.The second stage was analyzed at 150?to 300?for the release of iodine or the decomposition of polyiodide,indicating that the adsorption of iodine is a reversible process.In the third stage,the decomposition and release of cucurbituril were analyzed after 400?.It shows that it has good thermal stability.The results of Raman spectroscopy show that most of the iodine adsorbed in the crystal is in the form of polyiodine[I^-...I₂...I^-],and a small amount is in the form of triiodide I₃.