The inclusion properties of α-naphthol,β-naphthol with cucurbit[6]uril and cucurbit[7]uril were studied by fluoremetry,respectively.The experimental results showed that inclusion complex of α-naphthol/cucurbit[6]ur...The inclusion properties of α-naphthol,β-naphthol with cucurbit[6]uril and cucurbit[7]uril were studied by fluoremetry,respectively.The experimental results showed that inclusion complex of α-naphthol/cucurbit[6]uril,α-naphthol/cucurbit[7]uril and β-naphthol/ cucurbit[7]uril were formed with a ratio of 1:2,and their inclusion constants were 2.01×104,1.59×107,and 7.80×106,respectively.The thermodynamic function of the inclusion complex was determined by Benes-Hildebrand double-reciprocal method,ΔGθ =-41.7 kJ·mol-1,ΔHθ=66.6 kJ·mol-1 and ΔSθ=354.8 J·mol-1·K-1.According to the thermodymamic parameters,ΔGθ<0,it indicated that the inclusion process was a spontaneous reaction.ΔHθ>0,it was a endotherm reaction;ΔSθ>0,it was a process of molecular randomness enhanced.展开更多
The two symmetrical isomers in [Co(amp)2Cl2]2 (amp=2 (Aminomethyl)pyridine) system were synthesized by general oxidation method and were separated by chromatography and recrystallization method. Their configurations w...The two symmetrical isomers in [Co(amp)2Cl2]2 (amp=2 (Aminomethyl)pyridine) system were synthesized by general oxidation method and were separated by chromatography and recrystallization method. Their configurations were assigned by using 2D NMR techniques, particularly the NOESY NMR spectra. Solvent used was Me2SO d6 with the central peak of the CD3 septet as the reference (13C,δ 39.37;1H,δ 2.49 relative to SiMe4). Cation exchange media used was Dowex 50Wx 2(H+ form, 200～400mesh; Biorad).展开更多
The experimental results reveal that solubility of cucurbiturils is related with acidity of solution and metal ions. In hydrochloric acid, cucurbituril is the most soluble one, and cucurbituril is the least soluble on...The experimental results reveal that solubility of cucurbiturils is related with acidity of solution and metal ions. In hydrochloric acid, cucurbituril is the most soluble one, and cucurbituril is the least soluble one. There is no significant influence of alkaline metal ion on the solubility of cucurbiturils. The solubility of cucurbituril increases greatly in a SrCl2 solution. However, increase of weight of cucurbiturils suggest that cucurbiturils can catch Ba2+in a solution.展开更多
A novel complex of a new 1,4-dicyclohexyl cucurbituril(DCYQ6) with sodium(I) ion was synthesized, and the crystal structure was determined by X-ray diffraction technique. In this self-assembled entity both the cavity ...A novel complex of a new 1,4-dicyclohexyl cucurbituril(DCYQ6) with sodium(I) ion was synthesized, and the crystal structure was determined by X-ray diffraction technique. In this self-assembled entity both the cavity interaction of DCYQ6 included a nitrate anion and the portal interaction of the dipole carbonyls of DCYQ6 with sodium cations lead to form self assembled molecular capsules. The crystal structure of the entity shows a packing of the self assembled molecular capsules connected by hydrogen bonds of water molecules. CCDC: 271400.展开更多
文摘The inclusion properties of α-naphthol,β-naphthol with cucurbit[6]uril and cucurbit[7]uril were studied by fluoremetry,respectively.The experimental results showed that inclusion complex of α-naphthol/cucurbit[6]uril,α-naphthol/cucurbit[7]uril and β-naphthol/ cucurbit[7]uril were formed with a ratio of 1:2,and their inclusion constants were 2.01×104,1.59×107,and 7.80×106,respectively.The thermodynamic function of the inclusion complex was determined by Benes-Hildebrand double-reciprocal method,ΔGθ =-41.7 kJ·mol-1,ΔHθ=66.6 kJ·mol-1 and ΔSθ=354.8 J·mol-1·K-1.According to the thermodymamic parameters,ΔGθ<0,it indicated that the inclusion process was a spontaneous reaction.ΔHθ>0,it was a endotherm reaction;ΔSθ>0,it was a process of molecular randomness enhanced.
文摘The two symmetrical isomers in [Co(amp)2Cl2]2 (amp=2 (Aminomethyl)pyridine) system were synthesized by general oxidation method and were separated by chromatography and recrystallization method. Their configurations were assigned by using 2D NMR techniques, particularly the NOESY NMR spectra. Solvent used was Me2SO d6 with the central peak of the CD3 septet as the reference (13C,δ 39.37;1H,δ 2.49 relative to SiMe4). Cation exchange media used was Dowex 50Wx 2(H+ form, 200～400mesh; Biorad).
文摘The experimental results reveal that solubility of cucurbiturils is related with acidity of solution and metal ions. In hydrochloric acid, cucurbituril is the most soluble one, and cucurbituril is the least soluble one. There is no significant influence of alkaline metal ion on the solubility of cucurbiturils. The solubility of cucurbituril increases greatly in a SrCl2 solution. However, increase of weight of cucurbiturils suggest that cucurbiturils can catch Ba2+in a solution.
文摘A novel complex of a new 1,4-dicyclohexyl cucurbituril(DCYQ6) with sodium(I) ion was synthesized, and the crystal structure was determined by X-ray diffraction technique. In this self-assembled entity both the cavity interaction of DCYQ6 included a nitrate anion and the portal interaction of the dipole carbonyls of DCYQ6 with sodium cations lead to form self assembled molecular capsules. The crystal structure of the entity shows a packing of the self assembled molecular capsules connected by hydrogen bonds of water molecules. CCDC: 271400.
