共查询到20条相似文献,搜索用时 15 毫秒
1.
S. V. Fedorenko A. R. Mustafina R. R. Amirov R. R. Zairov A. T. Gubaidullin O. D. Konovalova N. V. Rusakova S. S. Kost S. E. Solovieva I. S. Antipin A. I. Konovalov 《Russian Chemical Bulletin》2008,57(9):1905-1911
The conditions for the formation of heteroleptic complexes of a lanthanide(iii) ion (Ln = La, Gd, and Tb) with p-sulfonatothiacalix[4]arene and a heteroaromatic chromophore in water were found using X-ray diffraction analysis, pH-metry,
1H NMR and UV—Vis spectroscopy, and nuclear magnetic relaxation. In the resulting complexes, the heteroaromatic chromophore
is in the calix[4]arene cavity and the lanthanide ion is coordinated by the electron-donating groups of the upper or lower
calix[4]arene rim. Emission spectroscopic studies revealed changed emission properties of TbIII ions in the terbium(iii)—p-sulfonatothiacalix[4]arene—bipy complex.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1871–1878, September, 2008. 相似文献
2.
V. V. Skripacheva A. R. Mustafina V. A. Burilov L. F. Galiullina Sh. K. Latypov S. E. Solov’eva I. S. Antipin A. I. Konovalov 《Journal of inclusion phenomena and macrocyclic chemistry》2006,56(3-4):369-374
The non-symmetrical cobalt (III) complex cis-[Co(Ad)(en)2Cl]Cl (1Cl), possessing two flexible ethylendiaminate chelate rings (en) and monodentate N(9)-bound adeninate (Ad-) was chosen as the guest of p-sulfonatothiacalix[4]arene (STCA) to study the inclusion complex formation at wide range of pH 2–10. It was shown by 1H, NOE NMR methods and pH-metric procedure, that pH-driven variation of the inclusion mode of 1
+
into calixarene cavity is the result of the protonation of 1
+
via adeninate moiety. 相似文献
3.
A. R. Mustafina V. V. Skripacheva V. A. Burilov A. T. Gubaidullin N. V. Nastapova V. V. Yanilkin S. E. Solovieva I. S. Antipin A. I. Konovalov 《Russian Chemical Bulletin》2008,57(9):1897-1904
1H NMR titration and X-ray diffraction analysis revealed that [Ru(bipy)3]2+ forms an outer-sphere inclusion complex with p-sulfonatothiacalix[4]arene in a ratio of 1: 1 in both aqueous solutions and the solid state. According to cyclic voltammograms
and fluorimetric data, the outer-sphere association of [Ru(bipy)3]2+ with p-sulfonatothiacalix[4]arene changes the reversible character of the electrochemical oxidation of [Ru(bipy)3]2+ and lowers its emission intensity.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1863–1870, September, 2008. 相似文献
4.
A novel mononuclear complex of p-sulfonatecalix[4]arene and neodymium (III) ions in the presence of pyridine N-oxide has been investigated by X-ray diffraction study, which reveal that the bi-layer sheet structure is formed in the solid state. An aquated neodymium ion connects the adjacent calixarene-pyridine N-oxide complex units through multiple hydrogen bonds to stabilize the bi-layer structure. 相似文献
5.
B.F. Graham J.M. Harrowfield R.D. Tengrove A.F. Lagalante R.D. Bruno 《Journal of inclusion phenomena and macrocyclic chemistry》2002,43(3-4):179-182
In this paper we report evidence for an inclusion complex between carbon dioxide and p-t-butylcalix[4]arene. The complex was studied with infrared spectroscopy,single-crystal X-ray diffraction, solid-state NMR, and thermogravimetric analysis.Results indicate that 70% of the p-t-butylcalix[4]arene cavities could be occupiedby a CO2 molecule following exposure at 30 MPa and 40 °C. 相似文献
6.
5-碘[杯(4)芳烃偶氮]氨基喹啉光度法测钯 总被引:1,自引:0,他引:1
合成了新试剂5 碘[杯(4)芳烃偶氮]氨基喹啉(ICAQ),并研究了该试剂与钯显色反应条件。结果表明,在pH10.2~11.0的Na2CO3 NaHCO3缓冲介质中,在TritonX 100存在下,试剂与钯发生显色反应,生成1∶1稳定络合物。建立了测定钯的光度法新体系,λmax=625nm,ε=1.42×105L·mol-1·cm-1,钯质量浓度在0~0 80μg/mL内符合比尔定律。方法用于钯催化剂中钯的测定,结果与原子吸收法相符,平行6次测定的RSD在2.5%~3.0%。 相似文献
7.
Jinyu Shen H. Fred Koch D. Max Roundhill 《Journal of inclusion phenomena and macrocyclic chemistry》2000,38(1-4):57-67
Calix[4]arenes with both ligating and methoxy poly(ethylene glycol) groups appended have been synthesized using several approaches, involving the formation of sulfonyl ester groups on the wide rim, Schiff base derivatives on the narrow rim, and thioether groups on both the wide and narrow rims. These new derivatives have been characterized by a combination of infrared and 1H NMR spectroscopy. Compounds 10 and 11 are insoluble in both water and aqueous poly(ethylene glycol), but the other new compounds are soluble. 相似文献
8.
Hayedeh Bagheri Sadeghi Atefeh Tamaddon Hadi Afifinia Nasim Almasian Fatemeh Bozorgvar Somayeh Mollaei 《Electroanalysis》2011,23(10):2472-2478
A new chromium(III) PVC membrane sensor incorporating p‐tertiary‐butyl calix[4]arene as ionophore, potassium tetrakis as additive and dibutyl phthalate (DBP) as plasticizer was constructed. The electrode exhibited an excellent potentiometric response over a wide concentration range of 1.0×10?7–1.0×10?1 M with a Nernstian slope of 20±0.5 mV per decade. The detection limit was 5.0×10?8 M. The electrode showed a better performance over a pH range of 3.0–8.0, and had a short response time of about <15 s.The electrode was successfully applied to potentiometric titration of Cr (III) with EDTA and for direct determination of chromium(III) in waste water. 相似文献
9.
10.
Sebastiano Pappalardo Francesco Bottino Luigi Giunta Marek Pietraszkiewicz Jerzy Karpiuk 《Journal of inclusion phenomena and macrocyclic chemistry》1991,10(3):387-392
Two calix[4]arenes with four 2-pyridyhnethyl-l-oxide pendant groups at the lower rim have been synthesized, and their Tb(III) and Eu(III) complexes are fluorescent upon UV light excitation at 312 nm. The complexes are not stable in aqueous solution, completely losing their luminescent properties. 相似文献
11.
12.
Arturo Arduini Eleonora Ghidini Andrea Pochini Rocco Ungaro Giovanni Dario Andreetti Gianluca Calestani Franco Ugozzoli 《Journal of inclusion phenomena and macrocyclic chemistry》1988,6(2):119-134
From the reaction ofp-t-butylcalix[4]arene with -chloro-N,N-diethyl acetamide a new lipophilic ether-amide ligand (2) has been obtained in high yield. Solution studies show (2) to be a very strong cation receptor for alkali cations, especially sodium and potassium. The X-ray crystal structure determination of the free ligand (2) and two potassium complexes (KI and KSCN) shows the calix[4]arene in a fixed cone structure and the cation completely encapsulated in a polar cavity of eight oxygen atoms.
Supplementary Data relating to this article are deposited with the British Library as supplementary publication No. SUP 82059 (57 pages).Presented at the Fourth International Symposium on Inclusion Phenomena and the Third International Symposium on Cyclodextrins, Lancaster, U.K., 20–25 July 1986. 相似文献
13.
The cationic di-μ-hydroxo dinuclear complexes of molybdenocene and tungstenocene [Cp2M(μ-OH)2MCp2]+ (Cp = η-C5H5; M = Mo or W) react with tropolone to afford corresponding tropolonato complexes [Cp2M(trop)]+ (trop = C7H5O2). The products were investigated by IR, 1H NMR, and 13C NMR spectroscopy as well as by X-ray crystallography (M = W). The structure shows that the central metal is surrounded by a distorted tetrahedral array of the two centers of cyclopentadienyl ligands and the two oxygen atoms of tropolonato ligand. The reaction has been extended to the synthesis of calix[4]arene receptor functionalized at the 1,3-positions of the upper rim with two tropolonato-molybdenocene centers. 相似文献
14.
Mercedes Vázquez Johan Bobacka Minna Luostarinen Kari Rissanen Andrzej Lewenstam Ari Ivaska 《Journal of Solid State Electrochemistry》2005,9(5):312-319
Potentiometric ion sensors have been prepared by galvanostatic electrosynthesis of the conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) doped with p-sulfonated calix[4]arene (C[4]S) and p-methylsulfonated calix[4]resorcarenes (Rn[4]S) with alkyl substituents of different chain length (R1=CH3; R2=C2H5; R3=C6H13). The bowl-shape of these doping ions makes them suitable as ionic recognition sites, and their bulky character is expected to prevent them from leaching out of the conducting polymer membrane. For comparison, sensors based on PEDOT doped with poly(styrene sulfonate) (PSS) and poly(vinyl sulfonate) (PVS) were also constructed. The resulting GC/PEDOT electrodes were conditioned in 0.01 mol L–1 AgNO3 and their performance as Ag+ ion-selective electrodes (ISEs) studied. Results reveal that selectivity and lifetime of the electrodes is affected by the doping anion structure, although all electrodes show selectivity towards Ag+ ions. Interaction of Ag+ with sulfur atoms present in the conducting polymer backbone is considered to be the main reason for this behavior. A second set of electrodes was constructed and conditioned in 0.1 mol L–1 KCl. These electrodes were tested in chloride solutions of quaternary ammonium cations, showing that C[4]S and R2[4]S exhibit significant sensitivity towards pyridinium.Dedicated to Professor György Horányi on the occasion of his 70th birthday in recognition of his outstanding contributions to electrochemistry 相似文献
15.
Abdelhalim Guelzim Mohamed Saadioui Zouhair Asfari Jacques Vicens 《Journal of inclusion phenomena and macrocyclic chemistry》2001,39(1-2):91-95
The synthesis of25-[2-(ethoxy-1-p-toluene-sulfonate)phenyl]-26,27,28-trihydroxy calix[4]arene3 as a byproduct of the preparation of 1,3-dialkylated25,27-di-[2-(ethoxy-1p-toluene-sulfonate)phenyl]-26,28-dihydroxy calix[4]arene 2 is reported. Compound 3 is a monoalkylatedcalix[4]arene in the cone conformation. The X-ray structure of 3 showed that this conformation is stabilized by intramolecular hydrogen bonding. 相似文献
16.
Qiu WG Li ZF Bai GM Meng SN Dai HX He H 《Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy》2007,66(4-5):1189-1193
The interaction of a cationic water-soluble porphyrin, 5,10,15,20-tetrakis[4-(3-pyridiniumpropoxy)phenyl]prophyrin tetrakisbromide (TPPOC3Py), with beta-CD and HP-beta-CD in aqueous solution has been studied by UV-vis, 1H NMR, 2D-NOESY and MALDI-TOF MS, and it reveals that a stable 1:1 inclusion complex between TPPOC3Py and HP-beta-CD or beta-CD has formed, in which one of the meso substituents of porphyrin ring has deeply penetrated through the cavity of HP-beta-CD from secondary face. The inclusion constants of the complexes of TPPOC3Py-beta-CD and TPPOC3Py-HP-beta-CD are (1.6+/-0.2)x10(3) M-1 and (8.9+/-0.4)x10(4) M-1, respectively. 相似文献
17.
The conductance behavior of some tris(ethylenediamine)cobalt(III) complexes was studied in dilute aqueous solutions at 25°C to investigate the ion-pair formation. The thermodynamic formation constants of the ion pairs [Co(en)3]3+·X– are 28 (chloride), 28 (bromide), 19 (nitrate), and 15 (perchlorate). These values were compared with theoretical values calculated by using Bjerrum's theory of ion association. The formation constant of [Co(en)3]3+·Cl– was larger than that obtained from the spectrophotometric measurement in solutions containing perchlorate ion. This difference in the formation constants was explained by considering the contribution of ion association of the complex cation with perchlorate ion. 相似文献
18.
Asiya Mustafina Margit Gruner Aidar Gubaidullin Sergey Katsyuba Viktoriya Skripacheva Elena Zvereva 《Supramolecular chemistry》2013,25(4):203-211
The 1H NMR and X-ray analysis data reveal the guest-induced cone → partial cone and cone → 1,2-alternate conformational shift in aqueous methanol solutions and solid state for a p-sulphonatothiacalix[4]arene-[Zn(dipy)3]2+ host–guest system. The experimental data, together with DFT calculations, show that the guest-induced conformational shift of p-sulphonatothiacalix[4]arene is facilitated by the deprotonation of phenolic groups. 相似文献
19.
20.
Eisaku Nomura Yoshio Otsuji Hisaji Taniguchi 《Journal of inclusion phenomena and macrocyclic chemistry》1995,23(1):53-63
This paper deals with the ability ofp-tert-butylcalix[6]arene derivative1, which has six 3,6,9-trioxadecyl substituents at the phenolic oxygens, to encapsulate CT complexes of alkadienes with iodine. By adding I2 to alkadienes in CH2Cl2 in the presence of1, the absorbance at 363 nm, which was ascribed to I
3
–
ion, increased in the order: 1,5-hexadiene<1,9-decadiene 1,7-octadiene. The reactivity features of the CT complexes in the presence of1 are discussed. 相似文献