排序方式: 共有41条查询结果,搜索用时 15 毫秒
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用冠醚与类双百草枯合成了新型的4价离子型穴醚,并且初步研究了它与3个客体的络合.4价离子型穴醚与百草枯的络合作用明显.4价离子型穴醚对3个客体有选择性识别作用.分子力学模拟结果也支持了以上结论. 相似文献
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Dr. Jiong Zhou Dr. Guocan Yu Yang Li Jie Shen Mengbin Wang Dr. Zhengtao Li Dr. Peifa Wei Prof. Dr. Jianbin Tang Prof. Dr. Feihe Huang 《Chemistry (Weinheim an der Bergstrasse, Germany)》2019,25(63):14447-14453
Cyanide is extremely hazardous to living organisms and the environment. Owing to its wide range of applications and high toxicity, the development of functional materials for cyanide detection and sensing is highly desirable. Host–guest complexation between bis(p-phenylene)-34-crown-10 H and N-methylacridinium salt G remarkably decreases the detection limit for cyanide anions compared with that of the guest itself. The [2]pseudorotaxane selectively recognizes the cyanide anion with high optical sensitivity as a result of the nucleophilic addition of the cyanide anion at the 9-position of G . The host–guest complexation is further incorporated into supramolecular materials for the visual detection of cyanide anions, especially the detection of cellular cyanide excretion with a detection limit of 0.6 μm . This supramolecular method provides an extremely distinct strategy for the visual detection of cyanide anions. 相似文献
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Xiaoling Huang Yebang Tan Yuexia Wang Hui Yang Jie Cao Yuju Che 《Journal of polymer science. Part A, Polymer chemistry》2008,46(18):5999-6008
The novel copolymers of acrylamide (AM) with complex pseudorotaxane monomer (BAMACB) of butyl ammonium methacrylate (BAMA) and cucurbit[6]uril (CB[6]) were prepared via free‐radical polymerization in aqueous solution. The copolymers containing pseudorotaxane (PAM/BAMACB) were characterized by 1H‐NMR, FTIR, elemental analysis, TGA, and DSC. The glass transition temperature (Tg) of the copolymer PAM/BAMACB are higher than that of the copolymer of acrylamide and butyl ammonium methacrylate (PAM/BAMA) because of the enhanced rigidity and the bulky steric hindrance of BAMACB side chain in PAM/BAMACB. The molecular weights of copolymer PAM/BAMACB were obtained via static light scattering. The hydrodynamic radii of coils or aggregates were investigated by dynamic light scattering. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 5999–6008, 2008 相似文献
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This paper is an up-to-date mini-review based on literature data and own results regarding synthesis and properties of conducting (pseudo)rotaxane supramolecular structures. Conjugated polymers, such as polyarylene, polyheteroarylene, polyaniline, polyarylenevinylene or polyaryleneimine, were used as axle, while the macrocyclic components were cyclodextrins, cucurbiturils, cyclophanes or crown ethers. Properties of the supramolecular structure such as solubility, thermal or chemical stability, conductivity, etc. can be drastically modified by the inclusion of hydrophobic conjugated polymers inside the macrocycle, without any chemical modification. For instance, the photophysical properties (i.e. quantum yield of fluorescence and electroluminescence) of the supramolecular structures were enhanced when compared with uninsulated conjugated polymers. The doping process is also affected, because the access of a dopant to the conjugated chain is limited only to the uncovered domains of the conjugated chain. 相似文献
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Dolores Castillo Ruy Cervantes Carlos Frontana Felipe J. Gonzalez Jorge Tiburcio 《Journal of Physical Organic Chemistry》2014,27(8):701-706
A new derivative of the previously reported 1,2‐bis(benzimidazol‐2‐yl)ethane motif, cation [1H2]2+, was synthesized under microwave irradiation and fully characterized by solution NMR, high‐resolution mass spectrometry, cyclic voltammetry and X‐ray crystallography. This cation presents a linear geometry and incorporates nitro substituents as electrochemical handles. In solution, cation [1H2]2+, is capable of threading the cavity of dibenzo‐24‐crown‐8 ether host (DB24C8) giving rise to a [2]pseudorotaxane complex [1H2?DB24C8]2+, regardless of the counterion, [CF3SO3]? or [CF3COO] ?. The interpenetrated structure of [1H2?DB24C8]2+ was proven by solution NMR and X‐ray crystallography. This host–guest complex is held together by several non‐covalent interactions, such as hydrogen bonding and ion‐dipole. An electrochemical study of [1H2]2+ in the presence of variable amounts of DB24C8 was performed; due to the irreversible redox behavior of cation [1H2]2+, it was not possible to electrochemically control the association/dissociation process with DB24C8. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
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白光发射超分子水凝胶的构筑和发光性能研究 总被引:1,自引:0,他引:1
具有白光发射性质且发光可调的超分子水凝胶在发光材料和荧光检测领域具有广泛的应用前景.采用双(2-氨基丙基醚)聚丙二醇(PPG-NH2)链穿线带有正电荷的6-乙二胺修饰β-环糊精构成准轮烷,进而与锂皂石作用构筑了超分子水凝胶,并通过流变、zeta电势和扫描电镜等手段对凝胶性质进行了表征.当将扭曲分子内电荷转移(TICT)型的有机染料分子硫黄素T(ThT)和碘化4-[4-(二甲基氨基)苯乙烯基]-1-甲基吡啶鎓(DASPI)引入到水凝胶中,这两种有机染料能够在凝胶相中发生荧光共振能量转移(FRET),从而产生包括白光在内的不同颜色的荧光发射.本研究为水基超分子发光软材料提供了一种新的构筑方法. 相似文献
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Host–guest complexation of cucurbit[6]uril and α,α′,δ,δ′-tetramethyl-cucurbit[6]uril with 2,2′-(decane-1,10-diyl)-diisoquinolinium has been investigated by 1H NMR, UV and fluorescence spectroscopy in aqueous solution and by X-ray crystallography in solid state. Experimental data suggest that in the aqueous solution, both host molecules form [2]pseudorotaxanes with the host located over the decyl chain of the guest. In the solid state, neighbouring [2]pseudorotaxanes are linked by π?π and C–H?π interactions, eventually generating polypseudorotaxanes. 相似文献
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