Selective transmembrane carriers for hydroxycarboxylic acids: Influence of a macrocyclic calix[4]arene platform

Selective transmembrane carriers for a-hydroxy acids, acyclic a-amino phosphonates and calix[4]arenes containing a-aminophosphonate substituents at the lower rim have been synthesized; analytical HPLC has been used to monitor the selective separation of dicarboxylic, a-hydroxy and a-amino acid mixtures by membrane extraction; the attachment of a-aminophosphonate fragments to the macrocyclic calix[4]arene platform results in receptors with markedly modified efficiency and selectivity relative to those of only aminophosphonates. © 2012 Mendeleev Communications. All rights reserved

Synthesis and spatial structure of novel organosilicon derivatives of p-tert-butylthiacalix[4]arene from two-dimensional NMR data

New organosilicon derivatives of p-tert-butylthiacalix[4]arene with one or two ring fragments at the macrocycle lower rim were synthesized. The spatial structures of the resulting compounds were established by two-dimensional NMR spectroscopy. On going from the methyl substituents at the silicon atom to phenyl substituents, closure of the second silicon-containing ring is hampered because of steric hindrance in the reaction site. © 2007 Springer Science+Business Media, Inc

Synthesis of new tris(1-amino)phosphonates based on tris(2-aminoethyl)amine

© 2016 Taylor & Francis Group, LLC.New aminophosphonate derivatives of tris(2-aminoethyl)amine were synthesized. The structures of the newly synthesized derivatives were fully proven by 1H, 31P, 13C NMR, IR spectroscopy, mass spectrometry (MALDI-TOF), and elemental analysis

Research of the formation possibility of the nanoresonator based on 2D-h-BN surface

In microworld some materials with adsorbed metal atoms on their surface can act as a resonators in case the metal atoms are considered as conductive lines. In this paper we have studied the possibility of 2D-h-BN modification by lithium atoms to use this new 2D material as base of a nanoresonator in the future

Phosphorylated amino derivatives of thiacalix[4]arene as membrane carriers: Synthesis and host-guest molecular recognition of amino, hydroxy and dicarboxylic acids

Promising membrane transport and separation systems for selected dicarboxylic, α-hydroxy- and α-amino acids based on thiacalixarene platform have been developed. For the first time, p-tert-butyl thiacalix[4]arenes functionalized at the lower rim with aminophosphonate fragments have been obtained and characterized. As was established by UV-vis spectroscopy, membrane extraction and HPLC, the substitution of amino groups by α-aminophosphonate units significantly enhances the selectivity of host molecules that bind to aspartic and glycolic acids. The aminophosphonate compounds synthesized can be used in the development of sensors and systems employed in the purification and separation of organic acids. Copyright © 2013 John Wiley & Sons, Ltd. Promising membrane transport and separation systems for selected dicarboxylic, α-hydroxy- and α-amino acids based on thiacalixarene platform have been developed. As was established by UV-vis spectroscopy, membrane extraction and HPLC, the substitution of amino groups by aminophosphonate units significantly enhances the selectivity of host molecules that bind to aspartic and glycolic acids. Copyright © 2013 John Wiley & Sons, Ltd

Selective transmembrane carriers for hydroxycarboxylic acids: Influence of a macrocyclic calix[4]arene platform

Selective transmembrane carriers for a-hydroxy acids, acyclic a-amino phosphonates and calix[4]arenes containing a-aminophosphonate substituents at the lower rim have been synthesized; analytical HPLC has been used to monitor the selective separation of dicarboxylic, a-hydroxy and a-amino acid mixtures by membrane extraction; the attachment of a-aminophosphonate fragments to the macrocyclic calix[4]arene platform results in receptors with markedly modified efficiency and selectivity relative to those of only aminophosphonates. © 2012 Mendeleev Communications. All rights reserved

Selective transmembrane carriers for hydroxycarboxylic acids: Influence of a macrocyclic calix[4]arene platform

Selective transmembrane carriers for a-hydroxy acids, acyclic a-amino phosphonates and calix[4]arenes containing a-aminophosphonate substituents at the lower rim have been synthesized; analytical HPLC has been used to monitor the selective separation of dicarboxylic, a-hydroxy and a-amino acid mixtures by membrane extraction; the attachment of a-aminophosphonate fragments to the macrocyclic calix[4]arene platform results in receptors with markedly modified efficiency and selectivity relative to those of only aminophosphonates. © 2012 Mendeleev Communications. All rights reserved

Synthesis and spatial structure of novel organosilicon derivatives of p-tert-butylthiacalix[4]arene from two-dimensional NMR data

New organosilicon derivatives of p-tert-butylthiacalix[4]arene with one or two ring fragments at the macrocycle lower rim were synthesized. The spatial structures of the resulting compounds were established by two-dimensional NMR spectroscopy. On going from the methyl substituents at the silicon atom to phenyl substituents, closure of the second silicon-containing ring is hampered because of steric hindrance in the reaction site. © 2007 Springer Science+Business Media, Inc

Synthesis and spatial structure of novel organosilicon derivatives of p-tert-butylthiacalix[4]arene from two-dimensional NMR data

New organosilicon derivatives of p-tert-butylthiacalix[4]arene with one or two ring fragments at the macrocycle lower rim were synthesized. The spatial structures of the resulting compounds were established by two-dimensional NMR spectroscopy. On going from the methyl substituents at the silicon atom to phenyl substituents, closure of the second silicon-containing ring is hampered because of steric hindrance in the reaction site. © 2007 Springer Science+Business Media, Inc

Synthesis of new tris(1-amino)phosphonates based on tris(2-aminoethyl)amine

© 2016 Taylor & Francis Group, LLC.New aminophosphonate derivatives of tris(2-aminoethyl)amine were synthesized. The structures of the newly synthesized derivatives were fully proven by 1H, 31P, 13C NMR, IR spectroscopy, mass spectrometry (MALDI-TOF), and elemental analysis