共查询到20条相似文献,搜索用时 15 毫秒
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Fumio Hamada Takenori Fukugaki Koichi Murai G. William Orr Jerry L. Atwood 《Journal of inclusion phenomena and macrocyclic chemistry》1991,10(1):57-61
The liquid-liquid extraction of various metal ions by a diphenylphosphino calix[4]arene (1) using picrate counter ion has been studied and compared with those ofp-tert-butyl-calix[4]arene methyl ether (2) and triphenylphosphine (3). The calixarene 1 shows strong binding ability to almost all metal cations examined, but calixarene 2 shows little ability to extract any of them. Based on the continuous variation method, calixarene 1 formed 1: 2 complexes with copper(II) ion. 相似文献
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以对叔丁基苯酚为原料,经逐步反应在对叔丁基杯[4]芳烃的下缘引入含卤素的基团,得到了一系列含卤素的杯[4]芳烃衍生物(记为1,2,3,4);利用核磁共振谱和气相色谱-质谱证实了目标产物的结构;并评价了产物对水中的Cr3+、Cu2+、Ag+的萃取性能.结果表明:杯[4]芳烃衍生物2、3和4分别对Cr3+、Cu2+和Ag+具有较好的萃取效果. 相似文献
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Aytan Yilmaz Shahabuddin Memon Mustafa Yilmaz 《Journal of polymer science. Part A, Polymer chemistry》1999,37(23):4351-4355
Two calix[4]arene derivatives (5 and 8) and their telomers are synthesized to estimate selective extraction of alkali and transition metal cations from the aqueous to the organic phase (chloroform). Compound 5 shows selectivity toward Hg2+. Compound 8 and telomers 6 and 9 are not selective but are good extractants for all used transition metal ions. The observations suggest that ethylene glycol bridges are efficient for carrying transition metal cations in a two-phase solvent system. © 1999 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 37: 4351–4355, 1999 相似文献
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Synthesis of a novel calix[4]arene-based fluorescent ionophore and its metal ions recognition properties 总被引:1,自引:0,他引:1
A novel fluorescent ionophore derived from calix[4]arene and pyrazoline was designed and synthesized. Its molecular structure was confirmed by 1H NMR and element analysis. The resulting material shows specific fluorescent behavior toward the Zn2+ ion among the other divalent metal ions, such as Co2+, Ni2+, Cu2+. The primary results indicate this ionophore material is a potential material for developing efficient fluorescent Zn2+ chemosensors. 相似文献
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Hasalettin Deligz Mustafa Tavasli Mustafa Yilmaz 《Journal of polymer science. Part A, Polymer chemistry》1994,32(15):2961-2964
A polymeric compound containing more than one calixarene molecule was synthesized by reacting the oligomer ( 2 ) with 25,26,27-tribenzoyloxy-28-hydroxy calix[4]arene. After basic hydrolysis of 3a , the polymeric calixarene ( 3b ) was utilized for selective extraction of some metal cations from aqueous phase to organic phase. It was found that the compound ( 3b ) was selective toward Fe3+ from an aqueous solution containing Cu2+, Ni2+, Co2+ and Fe3+ cations. The mechanism of the extraction process was discussed. © 1994 John Wiley & Sons, Inc. 相似文献
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Zouhair Asfari Sebastiano Pappalardo J. Vicens 《Journal of inclusion phenomena and macrocyclic chemistry》1992,14(2):189-192
A doubly-crowned calix and a double-calixcrown derived from 4,6,10,12,16,18,22,24,25,26,27, 28-dodecamethyl-5,11,17, 23-tetrahydroxycalix[4]arene (1) have been prepared by reaction of appropriate oligoethylene glycol ditosylates with (1) in acetonitrile in the presence of potassium carbonate. A potassium template effect is observed during one of the double cyclizations. 相似文献
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WANG KeRang GUO DongSheng JIANG BangPing & LIU Yu State Key Laboratory of Elemento-Organic Chemistry 《中国科学B辑(英文版)》2009,(4)
A novel calix[4]arene derivative with pyrene fluorophores at the upper rim and tetraester ionophores at the lower rim was synthesized in six steps,and its structure was proved by NMR and ESI-MS spectro-scopies. Furthermore,the chemosensing behavior of the host compound for alkali and alkaline earth metal ions was investigated by fluorescence spectroscopy. The obtained results show that the calix-arene host can selectively bind sodium ion with the complexation stability constant of 2190 mol-1.L. The complexa... 相似文献
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Peter Timmerman Sybolt Harkema Gerrit J. Van Hummel Willem Verboom David N. Reinhoudt 《Journal of inclusion phenomena and macrocyclic chemistry》1993,16(2):189-197
The formation of a stable calix[4]arene monohemiketal is described. X-ray crystallographic data provide conclusive evidence for the presence of a stabilizing hydrogen bond.
Supplementary Data. Lists of H-atom parameters and bond lengths and angles involving hydrogens have been deposited with the British Library Document Supply Centre as Supplementary Publication No. SUP 82159 (5 pp.). 相似文献
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Morteza Hosseini Mohammad Rahimi Hayedeh Bagheri Sadeghi Saeed Taghvaei-Ganjali Shiva Dehghan Abkenar Mohammad Reza Ganjali 《International journal of environmental analytical chemistry》2013,93(6):407-422
A PVC membrane electrode for Hg(II) ions, based on a new cone shaped calix[4]arene (L) as a suitable ionophore was constructed. The sensor exhibits a linear dynamic in the range of 1.0 × 10?6–1.0 × 10?1 M, with a Nernstian slope of 29.4 ± 0.4 mV decade?1, and a detection limit of 4.0 × 10?7 M. The response time is quick (less than 10 s), it can be used in the pH range of 1.5–4, and the electrode response and selectivity remained almost unchanged for about 2 months. The sensor revealed comparatively good selectivity with respect to most alkali, alkaline earth, and some transition and heavy metal ions. It was successfully employed as an indicator electrode in the potentiometric titration of Hg2+ ions with potassium iodide, and the direct determination of mercury content of amalgam alloy and water samples. 相似文献
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The bis(calix [4] arene)3 was synthesized in moderate yield by the reaction of p-tert-butylcalix [4] arene (1) with 1,4-bis(chloromethyl) benzene (2). The conformation of all alkylated product 4 was investigated by the variable-temperature ^1H-NMR. 相似文献
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A novel calix[4]arene derivative with pyrene fluorophores at the upper rim and tetraester ionophores at the lower rim was
synthesized in six steps, and its structure was proved by NMR and ESI-MS spectroscopies. Furthermore, the chemosensing behavior
of the host compound for alkali and alkaline earth metal ions was investigated by fluorescence spectroscopy. The obtained
results show that the calixarene host can selectively bind sodium ion with the complexation stability constant of 2190 mol−1·L. The complexation with sodium ion can pronouncedly induce the excimer emission to decrease and the monomer emission to
increase, whereas the addition of the other alkali and alkaline earth metal ions does not cause appreciable changes in the
fluorescence spectrum of the host compound. The present calix[4]arene derivative displays potential application as fluorescent
chemosensor for sodium ion.
Supported by the National Natural Science Foundation of China (Grant Nos. 20421202, 20673061 & 20703025) and the 111 Project
(Grant No. B06005) 相似文献
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Sergey N. Podyachev Nadezda E. Burmakina Svetlana N. Sudakova Victor V. Syakaev Alexander I. Konovalov 《Supramolecular chemistry》2013,25(6):339-346
New de-tert-butyltetrathiacalix[4]arenes with acetylhydrazide substituents in cone and 1,3-alternate conformations have been synthesised with good yield by the hydrazinolysis of calix[4]arene ester derivatives. The recognition ability of synthesised macrocycles towards transition and alkali metals has been investigated by the picrate extraction method. The stoichiometry of complexes and the extraction constants have been determined. It has been found that tetrahydrazides do not extract alkali metal ions, but show an excellent affinity towards transition and heavy metal cations. The 1,3-alternate conformer of de-tert-butyltetrathiacalix[4]arene has revealed a remarkable selectivity for Ni2+ and Ag+ in the row of d-elements and for Cd2+ ion among the toxic heavy metals. The experimental data show that the removal of tert-butyl groups from tetrathiacalix[4]arene framework leads to the drastic improvement of extraction efficiency and selectivity of new tetrahydrazides. 相似文献
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In the present work, we synthesised a functionalised calix[4]arene with 5,11-di(N-methyl-E-(4-pyridylethylene) moiety (CX[4]), and investigated interactions of it with HemiMeQ[6], HemiMeQ[7], and Q[8]) in both water and DMSO using fluorescence spectrophotometry and 1H NMR spectroscopy. Titration 1H NMR spectra revealed that Q[n]s prefers to include the N-methyl-E-(4-pyridylethylene) moiety. In particular, the interaction of CX[4] with Q[8] in water resulted in intense fluorescence emission, and this interaction system can respond to compounds such as amantadine. 相似文献
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Ozlem SahinMustafa Yilmaz 《Tetrahedron》2011,67(19):3501-3508
Fluorogenic tert-butylcalix[4]arenes bearing two pyrene pendant groups at the lower rim were synthesized. Based on ratiometric changes of monomer and excimer emissions, the pyrene amine derivative of calix[4]arene has been found to act as a selective sensor for Pb2+ and Cu2+ ions, respectively, due to a conformational change upon chelation of these ions. 相似文献