145307-27-3Relevant academic research and scientific papers
Calixarene derivatives
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Page column 9-10, (2010/11/30)
The invention relates to new calixarenes according to the formula: wherein: R1is an alkyl or aryl group, or a hydrogen atom, R2and R3, which may be identical or different, are alkyl or aryl groups, n is an integer ranging
A biscalix[4]arene-based ditopic hard/soft receptor for K+/Ag+ complexation
Budka, Jan,Lhoták, Pavel,Stibor, Ivan,Michlová, Veronika,Sykora, Jan,Cisarová, Ivana
, p. 2857 - 2861 (2007/10/03)
A biscalixarene bearing tert-butylated and de-tert-butylated calix[4]arene unit connected by four ethylenoxy bridges has been prepared. This compound adopts the pinched cone conformation (C2v symmetry) and hence, is suitably preorganised for Ag
Extraction and complexation of alkali, alkaline earth, and F-element cations by calixaryl phosphine oxides
Arnaud-Neu,Browne,Byrne,Marrs,McKervey,O'Hagan,Schwing-Weill,Walker
, p. 175 - 186 (2007/10/03)
A series of new calixarene derivatives with phosphine oxide groups on the lower rim and, for comparison, a series of noncalixarene phosphine oxides have been synthesised. Their extraction power for alkali and alkaline earth cations from aqueous metal picr
Carbonylation (hydroformylation and hydrocarbalkoxylation) reactions in the presence of transition metal: P-tert-butyl-calix[4]arene-based phosphine and phosphinite systems
Csok, Zsolt,Szalontai, Gabor,Czira, Gabor,Kollar, Laszlo
, p. 23 - 29 (2007/10/03)
In this study, 5,11,17,23-tetra-tert-butyl-25,26,27,28-tetrakis(2-diphenylphosphinoxy-ethoxy) calix[4]arene (5) and 5,11,17,23-tetra-tert-butyl-25,26,27,28-tetrakis(2-diphenylphosphinoethoxy)- calix[4]arene (6), as well as their platinum and palladium complexes (PtCl2)2(5), (PdCl2)2(5) were synthesised and characterised. In addition to these transition metal-containing complexes the catalytic systems formed in situ, from catalytic precursors PtCl2(PhCN)2, [Rh(nbd)Cl]2 and PdCl2(PhCN)2 and the corresponding calixarene ligand, were tested as catalysts in hydroformylation and hydrocarbalkoxylation, respectively. High chemoselectivity was obtained in hydroformylation in the presence of rhodium-containing catalysts both with the above calixarene-based phosphine and phosphinite ligands. The regioselectivity towards branched aldehyde shows a strong temperature dependence in case of phosphinite derivative. Although the platinum-containing systems show much lower catalytic activity, the regioselectivities are undoubtedly higher than those obtained with PtCl2(diphosphine)-SnCl2 systems.
Calixarene Phosphine Oxides. A New Series of Cation Receptors for Extraction of Europium, Thorium, Plutonium and Americium in Nuclear Waste Treatment
Malone, John F.,Marrs, Debbie J.,McKervey, M. Anthony,O'Hagan, Paul,Thompson, Norris,et al.
, p. 2151 - 2154 (2007/10/02)
A novel class of calixarene derivatives with phosphine oxide residues attached to the lower rim showing high efficiency in extraction of EuIII, ThIV, PuIV, and AmIV from simulated nuclear
Transduction of selective recognition of heavy metal ions by chemically modified field effect transistors (CHEMFETs)
Cobben, Peter L. H. M.,Egberink, Richard J. M.,Borner, Johan G.,Bergveld, Piet,Verboom, Willem,Reinhoudt, David N.
, p. 10573 - 10582 (2007/10/02)
Specifically substituted calix[4]arènes that complex selectively silver (2), copper (13), cadmium (23), and lead (29) cations were synthesized via di- and tetraalkylation of p-tert-butylcalix[4]arene. Calix[4]arenes derivatized with thioether, thioamide,
