نتایج جستجو برای: calix4 arene

تعداد نتایج: 2973  

Journal: :Indonesian Journal of Chemistry 2022

This study aims to investigate the application of two calix[4]arene derivatives named 5,11,17,23-tetra-(t-butyl)-25,26,27,28-tetrahydroxycalix[4]arene (TBCA) and 5,11,17,23-tetra-(t-butyl)-26,27,28-tribenzoyloxycalix[4]arene (TBMTCA) as adsorbents Pb(II) from aqueous solution in a batch system. Adsorption was carried out by varying pH solution, exposure time, concentration. The kinetics evaluat...

Journal: :Crystal Growth & Design 2021

Cone-shaped calix[4]arene-tetrol 3 has the ability to form open structures due presence of four OH groups at upper rim, which allows construction H-bonded supramolecular organic frameworks (SOFs). In water, SOF-1 is formed, contains hydrophilic channels (mean diameter 8.5 Å) contoured by p-phenolic groups. acetonitrile, SOF-2 smaller hydrophobic 6.6 delimited aromatic walls. The Na+@3 complex, ...

Journal: :Chemistry 2016
Iwona Nierengarten Sebastiano Guerra Haifa Ben Aziza Michel Holler Rym Abidi Joaquín Barberá Robert Deschenaux Jean-François Nierengarten

New liquid-crystalline pillar[5]arene derivatives have been prepared by grafting first-generation Percec-type poly(benzylether) dendrons onto the macrocyclic scaffold. The molecules adopt a disc-shaped structure perfectly suited for self-organization into a columnar liquid-crystalline phase. In this way, the pillar[5]arene cores are piled up, thus forming a nanotubular wire encased within a she...

2017
Divambal Appavoo Diego Carnevale Robert Deschenaux Bruno Therrien

Three ureido-pyrimidone derivatives (N-LH) were used to generate in combination with four dinuclear arene ruthenium clips, (p-cymene)2Ru2(OO∩OO)Cl2 (OO∩OO 1⁄4 oxalato, 2,5-dioxido-1,4-benzoquinonato, 2,5-dichloro-1,4-benzoquinonato, 5,8-dioxido-1,4-naphtoquinonato), twelve cationic arene ruthenium metalla-cycles of the general formula [(p-cymene)2Ru2(OO∩OO)(N-L)2]2(CF3SO3)4. The ureidopyrimidon...

2011
Mikio Ouchi

The synthesis and cation-binding properties of a series of Calixarene derivatives possessing alkyl chain groups, ester groups and crown ether rings have been investigated. The syntheses of Calix[4]arene crown ethers and Calix[6]arene derivatives possessing alkyl chain, ester group and crown ether ring have been described. In order to evaluate their monovalent cation binding abilities, solvent e...

2016
Zong-Jie Guan Jiu-Lian Zeng Zi-Ang Nan Xian-Kai Wan Yu-Mei Lin Quan-Ming Wang

Surface organic ligands are critical for the formation and properties of atomically precise metal nanoclusters. In contrast to the conventionally used protective ligands such as thiolates and phosphines, thiacalix[4]arene has been used in the synthesis of a silver nanocluster, [Ag35(H2L)2(L)(C≡CBu(t))16](SbF6)3, (H4L, p-tert-butylthiacalix[4]-arene). This is the first structurally determined ca...

2010
Michaël Gras Bruno Therrien Georg Süss-Fink Angela Casini Fabio Edafe Paul J. Dyson

The dinuclear dichloro complexes [(g-arene)2Ru2(l-Cl)2Cl2] and [(g-C5Me5)2M2(l-Cl)2Cl2] react with 2-(pyridine-2-yl)thiazole (pyTz) to afford the cationic complexes [(g-arene)Ru(pyTz)Cl] (arene = C6H6 1, p-PrC6H4Me 2 or C6Me6 3) and [(g-C5Me5)M(pyTz)Cl] (M = Rh 4 or Ir 5), isolated as the chloride salts. The reaction of 2 and 3with SnCl2 leads to the dinuclear heterometallic trichlorostannyl de...

Journal: :Organic & biomolecular chemistry 2009
Luca Pescatori Arturo Arduini Andrea Pochini Andrea Secchi Chiara Massera Franco Ugozzoli

The binding efficiency of a series of monotopic () and heteroditopic () calix[4]arene-based receptors has been evaluated in chloroform solution toward N-methylpyridinium ion pairs using NMR and UV/vis spectroscopic techniques. These experiments provided evidence that, due to a positive cooperative effect, the presence of a phenylurea H-bond donor group on the upper rim of the calix[4]arene macr...

Journal: :Chemical communications 2015
I A Karpenko A S Klymchenko S Gioria R Kreder I Shulov P Villa Y Mély M Hibert D Bonnet

Herein, we show that a far-red arylidene-squaraine dye is stable against nucleophiles, in contrast to arene-squaraines. Owing to the fluorescence enhancement in apolar media together with high brightness and photostability, this dye was successfully applied to detect the oxytocin G protein-coupled receptor and monitor its internalization in living cells.

2013
De-Xun Xie De-Lie An

The title calix[4]arene compound [systematic name: 3,9,15,34-tetra-tert-butyl-19,29-dioxa-24-thia-hexa-cyclo-[15.13.7.1(7,11).1(32,36).0(5,30).0(13,18)]nona-triaconta-1(30),2,4,7,9,11(39),13,15,17,32,34,36(38)-dodeca-ene-38,39-diol], C52H70O4S, displays a cone-like conformation, the opposite arene rings bridged by the mono-thia-crown-3 unit are nearly parallel [dihedral angle = 16.01 (18)°], wh...

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