共查询到20条相似文献,搜索用时 26 毫秒
1.
A. A. Turshatov N. B. Melnikova Yu. D. Semchikov I. S. Ryzhkina T. N. Pashirova D. M bius S. Yu. Zaitsev 《Colloids and surfaces. A, Physicochemical and engineering aspects》2004,240(1-3):101-106
Stable monolayers of novel amphiphilic calix[4]resorcinarene derivates at the air–water interface were prepared. Their interactions with copper ions from the aqueous subphase were investigated by measuring surface pressure–area and surface potential–area isotherms, as well as by Brewster angle microscopy. Theoretical aspects of interpreting the dependence of the surface pressure on the bulk copper ions concentration were discussed. The interaction of copper ions with calix[4]resorcinarene derivates was interpreted in terms of Gibbs–Shishkovsky adsorption equation. 相似文献
2.
3.
Valente Gómez-Benítez Rubén A. Toscano David Morales-Morales 《Journal of inclusion phenomena and macrocyclic chemistry》2004,50(3-4):199-202
The crystal structure of C-phenylcalix[4]resorcinarene in a very solvated environment (DMSO) has been determined. The asymmetric unit contains nine molecules of DMSO and one molecule of water for each molecule of the resorcinarene. The C-phenylcalix[4]resorcinarene adopts an approximate C2v symmetry (boat conformation, also known as flattened-cone conformation) in which two opposite resorcinol rings are almost parallel, while the other two are nearly coplanar.4,6,10,12,16,18,22,24-Octahydroxy-2,8,14,20-tetraphenyl-calix(4) arene.Supplementary data related to this article are deposited with the British Library as Supplementary Publication No. 82308 (3 pages). 相似文献
4.
Lubov S. Kuznetsova Asiya R. Mustafina Albina Yu. Ziganshina Ella Kh. Kazakova Alexander I. Konovalov 《Journal of inclusion phenomena and macrocyclic chemistry》2001,39(1-2):65-69
The alkylaminomethylatedcalix[4]resorcinarene derivatives, modified bydimethylamino-, piperidyl- and trimethylammoniummoieties, have been synthesised to investigate theirextractability towards lanthanide ions and to comparewith the extractability of calix[4]resorcinarene. Both calix[4]resorcinarene and its derivatives have beenshown to synergistically affect lanthanide ionextraction from neutral aqueous solutions by1,10-phenanthroline through outer-sphere interactionof lanthanide bis-phenanthrolinate cations withdeprotonated forms of calix[4]resorcinarene. Thederivatives with dimethylamino- andpiperidylmethylated moieties are shown to be moreeffective extractants in comparison with theunsubstituted one. 相似文献
5.
6.
Tetra-n-undecylcalix[4]resorcinarene forms solid adducts with secondary and tertiary amines. Thermal decomposition of these complexes was investigated by means of thermogravimetry (TG) and differential scanning calorimetry (DSC). It was found that deamination of complexes occurs as multi-step process. The stoichiometry of complexes was evaluated on the basis of TG studies and total heats of deamination were calculated from DSC measurements.Presented at the CCTA9 31.08-05.09 2003, Zakopane PolandThis work was supported by Grant No. 3T09A 02419 from The Polish Committee for Scientific Research. The authors thank to prof. W. Zielenkiewicz for helpful discussion during realisation of this project and prof. T. Borowiak for X-ray structure of the tetra-n-undecylcalix[4]resorcinarene. tetra-n-undecylcalix[4]resorcinarene. 相似文献
7.
用间苯二酚杯芳烃的氧代乙酸乙酯类衍生物1a~1b分别与三羟甲基甲胺和二乙醇胺在乙醇/甲苯中进行酰胺化反应, 合成了四种新型的间苯二酚杯芳烃树枝醇化合物2a~2d, 树枝醇2a~2d外缘的羟基用乙酸酐酯化, 得到全乙酰基衍生物3a~3d. 化合物结构都用1H NMR, IR和元素分析等方法进行了表征, 对树枝醇化合物的聚集状态进行了光学显微镜观察. 相似文献
8.
Nikolaeva I. L. Burilov A. R. Pudovik M. A. Habicher W. D. Konovalov A. I. 《Russian Chemical Bulletin》2001,50(4):748-750
Calix[4]resorcinarene reacts with N,N,N",N"-tetraethyl-P-ethylphosphonous diamide to give dioxaphosphocines, whose hydrolysis with intracavity water yields phosphinoyl derivative of calix[4]resorcinarene. 相似文献
9.
10.
By controlling the mol ratios of reactants, novel calix[4]resorcinarene–triphenylene monomer, dimer and tetramer were designed and synthesised in yields of 50–60% via Click chemistry. Their structures were characterised by NMR and MS. Their liquid crystalline behaviours were studied by differential scanning calorimetry, polarising optical microscopy and X-ray diffraction analysis. The more triphenylene units on calix[4]resorcinarene resulted in the wider temperature scopes of mesophase and higher phase transition temperatures. The monomer 6 and dimer 7 showed the mixed columnar mesophase with hexagonal columnar structure and disordered lamellar columnar structure, and compound 8 possessed only disordered lamellar columnar mesophase. These research results suggest that calix[4]resorcinarene was a good platform to construct columnar liquid crystal and the mesomorphic properties were greatly influenced by the substituted numbers of mesogen units on calix skeleton. 相似文献
11.
O. Danny Fox N. Kent Dalley Roger G. Harrison 《Journal of inclusion phenomena and macrocyclic chemistry》1999,33(4):403-414
Calix[4]resorcinarenes serve as host molecules for small guest molecules. Recently calixarenes have been appended to chiral molecules in an attempt to promote chiral recognition. To take advantage of both cavity host and chiral substituent properties the position of the chiral moiety is important. We report the synthesis and structural characterization of two calix[4]resorcinarene based molecules that have helical chirality in the solid state. The calix[4]resorcinarene 1 has chiral l-proline ethyl ester substituents positioned perpendicular to the cavity whereas the calix[4]resorcinarene 2 has morpholines positioned parallel to the cavity which extend the depth of the cavity. Compound 1 is one of the first compounds to show the position of chiral centers with respect to the calixarene cavity. 1H and 13C NMR spectroscopy indicate that the helical chirality of 2 is retained at low temperature in nonpolar solvents. 相似文献
12.
Teresa Borowia Marek Mączyński Marek Pietraszkiewicz Oksana Pietraszkiewicz 《Journal of inclusion phenomena and macrocyclic chemistry》1999,35(1-2):131-138
The crystal structure of the molecular complex of C-undecylcalix[4]resorcinarene with dioxane has been determined by X-ray analysis. The asymmetric unit contains one host and four guest molecules. The calix[4]resorcinarene moiety adopts a bowl conformation with C4v
symmetry. Four undecyl chains are axially oriented. Calix molecules are packed in a bowl-to-bowl fashion with alternating hydrophilic and hydrophobic layers. One of the hydrophilic dioxane molecules is located at the rim of the calix moiety and is hydrogen bonded to the other one. There is no interaction to attract, or direct the dioxane molecule into the interior of the cavity. There is an exo complex formed. The dioxane molecules – located in the hydrophobic part – are highly disordered. 相似文献
13.
Asiya R. Mustafina Svetlana V. Fedorenko Nelya A. Makarova Ella KH. Kazakova Zul'fiya G. Bazhanova Vladimir E. Kataev Alexander I. Konovalov 《Journal of inclusion phenomena and macrocyclic chemistry》2001,40(1-2):73-76
The inclusion behaviour of a new water-soluble sulfonated calix[4]resorcinarene towards alkylammonium and N-methylpyridinium cations has been investigated on the basis of 1H NMR spectroscopy and pH-potentiometry data. The inclusion of the N-methylpyridinium cation has been found to be dependent on pH with the preferable inclusion of the methyl substituent in alkaline and the aromatic ring in neutral aqueous media. 相似文献
14.
New calix[4]resorcinarenes bearing hydroxamic acid groups, calix[4]resorcinarene hydroxamic acids (CRAHAs), have been synthesized. 相似文献
15.
Viktoriya V. Skripacheva Ella Kh. Kazakova Nelly A. Markarova Vladimir E. Kataev Ludmila V. Ermolaeva Wolf D. Habicher 《Journal of inclusion phenomena and macrocyclic chemistry》2002,42(1-2):77-81
The binding of different sized and shaped metal complexes [Co(His)2]ClO4(1), [Co(en)2C2O4]Cl (2) and [K18-crown-6]SCN (3)(en-ethylendiamine, His-L-histidynate-anion) with a new tetrasulfonatomethylcalix[4]resorcinarene([H8X]Na4) was investigated in neutral and alkaline aqueous media by NMR and pH-metrictitration methods and compared with those of recently studied NMe4Br (4). The resultsobtained indicate that the outer-sphere coordination of complexes 1–3 by[H8X]4- proceeds via the interaction of hydrophobic fragments of the guestswith both the negatively charged rim and the hydrophobic cavity as a -base. Thenature of binding does not change for cations 1, 2 and 4 on going from[H8X]4- in neutral to [H4X]8- in alkaline media, while the inclusionof 3 decreases on going from [H8X]4- to [H4X]8-. 相似文献
16.
分子玻璃材料和多光子光刻技术分别是近年来光刻胶和光刻技术领域的研究热点.本文对分子玻璃正性光刻胶在多光子光刻中的应用进行了探索,设计合成了叔丁氧基羰基保护的杯[4]芳烃衍生物分子玻璃材料,将其作为主体材料与光生酸剂三氟甲磺酸三苯锍鎓盐进行复配,制备了分子玻璃正性光刻胶,探讨并优化了光刻胶的成分配比及其在紫外光曝光下的显影工艺.利用780nm波长飞秒激光对所制备的分子玻璃正性光刻胶进行了多光子光刻特性的评价,实验得到了最低线宽180nm的线条和复杂的二维微结构图形,结果表明杯[4]芳烃衍生物分子玻璃正性光刻胶有望应用于多光子光刻技术. 相似文献
17.
Pietraszkiewicz O. Utzig E. Zielenkiewicz W. Pietraszkiewicz M. 《Journal of Thermal Analysis and Calorimetry》1998,54(1):249-255
Lipophilic calix[4]resorcinarene derived from lauryl aldehyde forms stable crystalline solvates with a range of organic solvents:
acetone, 1,4-dioxane, methylethylvketone, dimethylformamide, dimethylacetamide, N-methylpyrrolidinone, butyronitrile, methanol,
1,2-dimethoxybenzene and acetonitrile. The composition and thermal stability of these solvates was followed by thermogravimetric
method, indicating a stoichiometry ranging from 1 to 3 (calixresorcinarene/solvent). The activation energy was evaluated for
the selected solvates. Molecular modelling, using Hyperchem 5.0 software, was applied to the selected solvates.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
18.
Liya A. Muslinkina Gennady A. Evtugyn Ella Kh. Kazakova Herman C. Budnikov 《Journal of inclusion phenomena and macrocyclic chemistry》1999,35(1-2):361-367
Synthetic ionophore calix[4]resorcinarene was incorporated into the poly(vinyl chloride) (PVC) plasticized membrane of an ion-selective electrode (ISE). Calixarene interactions with quaternary ammonium and alkaline metals cations in the organic and water-organic media were carefully investigated by various authors. We studied the effects of choline and Na+ cations present in the working solution on the ionophore which was incorporated into a membrane phase. Due to the pH sensitivity of the ionophore, a study was undertaken in a wide range of pH values. The different characteristics of calix[4]resorcinarene interactions with these cations were discovered by the ISE with the PVC plasticized membrane containing this ionophore, which respond to both the choline and Na+ cations due to the variation of working solution pH. 相似文献
19.
Thiourea‐bridged peracetylated glycoside calixarenes have been smoothly synthesized by the addition reactions of tetraacetylglycosyl isothiocyanates with amidoamine derivatives of calix[4]resorcinarene and p‐tert‐butylcalix[n]arenas (n=6, 8) in high yields (40–75%). All the glycoside‐containing calixarenes were characterized by 1H NMR, IR spectroscopy, and elemental analysis. 相似文献
20.
Mustafina A Elistratova J Burilov A Knyazeva I Zairov R Amirov R Solovieva S Konovalov A 《Talanta》2006,68(3):863-868
The use of water-soluble calixarenes: p-sulfonato thiacalixarene (ST), tetra-sulfonatomethylated calix[4]resorcinarene (SR), calix[4]resorcinarene phosphonic acid (PhR) as chelating agents in cloud point extraction (CPE) of La(III), Gd(III) and Yb(III) ions using Triton X-100 as non-ionic surfactant is introduced. The data obtained indicate that both complexation ability and structure of calixarenes govern the extraction efficiency of lanthanides. In particular ST and SR, forming 1:1 lanthanide complexes with similar stability in aqueous media, exhibit different extractability when used as chelating agents in CPE. First synthesized PhR was found to be the most efficient chelating agent exhibiting pH-dependent selectivity within La(III), Gd(III) and Yb(III) in CPE. 相似文献