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Summary: The applications of calixarenes in polymer synthesis have been reviewed. Calixarenes have been used as ligands to prepare rare earth calixarene complexes. A series of rare earth calixarene complexes have been synthesized and employed as efficient catalysts for the polymerization of ethylene, styrene, butadiene, propylene oxide, styrene oxide, trimethylene carbonate, and 5,5-dimethyl trimethylene carbonate. On the other hand, the synthesis and characterization of star-shaped polymers with calixarene as core molecules are also described. 相似文献
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JPC – Journal of Planar Chromatography – Modern TLC - The chromatographic behavior of calix[4]arene, 4-tert-butyl-calix[4]arene tribenzoate, 4-tert-butylcalix[5]arene, and pyrene have... 相似文献
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Nicola Y. Edwards David M. Schnable Ioana R. Gearba-Dolocan Jenna L. Strubhar 《Molecules (Basel, Switzerland)》2021,26(1)
Lanthanide complexes have been developed and are reported herein. These complexes were derived from a terpyridine-functionalized calix[4]arene ligand, chelated with Tb3+ and Eu3+. Synthesis of these complexes was achieved in two steps from a calix[4]arene derivative: (1) amide coupling of a calix[4]arene bearing carboxylic acid functionalities and (2) metallation with a lanthanide triflate salt. The ligand and its complexes were characterized by NMR (1H and 13C), fluorescence and UV-vis spectroscopy as well as MS. The photophysical properties of these complexes were studied; high molar absorptivity values, modest quantum yields and luminescence lifetimes on the ms timescale were obtained. Anion binding results in a change in the photophysical properties of the complexes. The anion sensing ability of the Tb(III) complex was evaluated via visual detection, UV-vis and fluorescence studies. The sensor was found to be responsive towards a variety of anions, and large binding constants were obtained for the coordination of anions to the sensor. 相似文献
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《Analytical letters》2012,45(9):1543-1551
Abstract The synthesis of a new type of chiral stationary phase, prepared from triethoxysilyl derivatives of calixarenes, and by the chemical immobilisation of these chiral molecular baskets to 3μm silica particles, is reported. Specifically, a silica-bonded calix[4]arene, funcrionalised at the lower rim with L-(-)-ephedrine, is prepared and packed into a short LC column for rapid chiral separations. Using reversed phase conditions and high flow rate, such new phases based on funcrionalised calixarenes are applicable to chiral aromatic and non-aromatic solutes and are capable of resolving the enantiomers of R(-) and S(+)-1-phenyl-2,2,2-trifluoroethanol in less than 45 seconds. 相似文献
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Santoyo-González F Torres-Pinedo A Sanchéz-Ortega A 《The Journal of organic chemistry》2000,65(14):4409-4414
The selective monoalkylation at the smaller (lower) rim of the p-tert-butylcalix[4]- and -[6]arenes using bis(butyltin)oxide and different alkylating agents is described. The procedure is remarkable for the mild conditions used allowing an efficiently access to monoalkylated calixarene derivatives in moderate to good yields. Monoalkynylcalix[4]arene and monoalkynylcalix[6]arene have been synthetically exploited for the synthesis of bis-calix[n]arenes (n = 4, 6) with a diyne bridge by oxidative coupling of alkynes. In addition, intermolecular methathesis of the obtained monoalkenyl-calix[4]arene allowed the preparation of bis-calix[4]arene that are single bridged at the smaller (lower) rim with a 2-butenyl moiety. 相似文献
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室温离子液体作为21世纪的新型溶剂,近几年在分析领域应用广泛.本文重点综述了离子液体在气相色谱、液相色谱、毛细管电泳及薄层色谱等方面的应用进展,并对其在色谱分离中的研究进行了展望. 相似文献
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Zouhair Asfari Jack Harrowfield Pierre Thuéry Jacques Vicens 《Supramolecular chemistry》2013,25(1):69-77
Crystal structure determinations for the hexarubidium and octacesium derivatives of calix[6]arene hexasulfonic acid, as well as of a new solvate of the pentasodium derivative of calix[4]arene tetrasulfonic acid, and comparison with structural data from the literature for alkali metal complexes of sulfonated calixarenes, have provided further evidence for the importance of interactions with aromatic ~ -electrons for the heavier alkali metal cations. There is evidence as well that this interaction can be enhanced by extended ionization of the sulfonated calixarene. 相似文献
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聚合物在胶束电动色谱中的应用 总被引:1,自引:0,他引:1
本文回顾了自1992 年聚合物第一次被用作胶束电动色谱准固定相以来聚合胶束、聚合物表面活性剂和枝状高分子在这方面的研究进展, 并与常用表面活性剂的性能进行了对比。 相似文献
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Ludwig R 《Fresenius' Journal of Analytical Chemistry》2000,367(2):103-128
Discovered in the 1940's, [1n]metacyclophanes with the common name calix[n]arenes which is derived from for the molecule's shape enjoyed a remarkable interest in almost all fields of chemistry since the 1980's, which is highlighted by several books [1-8]. Over 50 reviews concerning their synthesis, properties and applicabilities were published, many of those with emphasis on organic synthesis and structural properties are cited in [P. 5-6 in 2]. Of interest for analytical chemists are reviews on calixarenes and the structurally related resorcin[n]arenes (or calix[n]resorcarenes) and calixpyrroles concerning potentiometric sensors [9-12], chromo- and fluorophores [13, 14], molecular switches [15], metal ion binding in solution [16-19], redox properties [20] and anion binding [21-24]. Other recent reviews deal with thermodynamic aspects [25], organometallic compounds [26], P-containing calixarenes [27-29], as well as molecular dynamics modeling [30-33]. It is a vital field with over 200 publications per year. Therefore, this article presents only selected results on complexation, solvent extraction and membrane transport with the emphasis on ion and molecular recognition which can be used for analytical purposes, without attempting to cover all available references. 相似文献
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《液相色谱法及相关技术杂志》2012,35(8):1541-1553
Abstract In recent years, a rapid progress can be observed both in column and planar liquid chromatographic techniques. In the field of liquid column chromatography the most spectaular achievement was the development of high-performance liquid chromatographic/HPLC/ systems by means of several special instruments and sorbents/1, 2/. As regards planar techniques, the most significant break-through is the development of highperformance thin-layer chromatography/HPTLC//3/ based on the application of fine-particle sorbents. Both techniques proved to be very useful in many fields of chemical analysis, although the use of the latter is more restricted, mainly to micro chromatographic studies. 相似文献
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综述了水动力色谱的理论研究及三种主要水动力色谱方法,即微毛细管HDC,毛细管HDC和填充柱HDC,并着重介绍了HDC在胶体颗粒及聚合物大分子的分析与分离方面的应用。 相似文献