Results 11 to 20 of about 2,444 (178)

Separation performance of PEG-linked calix[4]arene as stationary phase for capillary gas chromatography [PDF]

open access: yesQuímica Nova, 2023
This work presented a new PEG modified calix[4]arene stationary phase (C4A-PEG-2PTSC) for gas chromatographic (GC) separations. The statically coated C4A-PEG-2PTSC column exhibited moderate polarity and column efficiency of 2224 plates m-1 determined by ...
Wei Zhang   +8 more
doaj   +1 more source

Crystal structure of a supramolecular lithium complex of p-tert-butylcalix[4]arene

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2018
Crystals of a supramolecular lithium complex with a calix[4]arene derivative, namely tetramethanollithium 5,11,17,23-tetra-tert-butyl-25,26,27-trihydroxy-28-oxidocalix[4]arene methanol monosolvate, [Li(CH3OH)4](C44H55O4)·CH3OH or [Li(CH3OH)4]+·(calix[4 ...
Manabu Yamada   +3 more
doaj   +1 more source

Association Complexes of Calix[6]arenes with Amino Acids Explained by Energy-Partitioning Methods

open access: yesMolecules, 2022
Intermolecular complexes with calixarenes are intriguing because of multiple possibilities of noncovalent binding for both polar and nonpolar molecules, including docking in the calixarene cavity.
Emran Masoumifeshani   +3 more
doaj   +1 more source

Multivalent Calixarene-Based Liposomes as Platforms for Gene and Drug Delivery

open access: yesPharmaceutics, 2021
The formation of calixarene-based liposomes was investigated, and the characterization of these nanostructures was carried out using several techniques. Four amphiphilic calixarenes were used.
José Antonio Lebrón   +11 more
doaj   +1 more source

Phosphorylated calix[4,8]arenes improve the RP HPLC separation of benzene derivatives

open access: yesЖурнал органічної та фармацевтичної хімії, 2020
Aim. To study the effect of 5,11,17,23-tetrakis(diisopropoxyphosphonyl)-25,26,27,28-tetrapropoxycalix[4]arene and oсtаkis(diethoxyphosphoryloxy)-tert-butylcalix[8]аrene additives to the MeCN – H2O mobile phase (86:14) on the selectivity of the separation
Olga I. Kalchenko   +2 more
doaj   +1 more source

Thermodynamic, Chemical and Electrochemical Investigations of Calixarene Derivatives as Corrosion Inhibitor for Mild Steel in Hydrochloric Acid Solution

open access: yesInternational Journal of Electrochemical Science, 2012
The focus of this study is to synthesize new calixarene derivatives namely calix[8]arenes (3a) (P1) and (2a) (P2), and to test its performance as corrosion inhibitor of steel in molar HCl at 308K. Polarization and weight loss measurements were used.
M. Kaddouri   +7 more
doaj   +1 more source

5,11,17,23-Tetra-tert-butyl-25,26,27,28-tetramethoxycalix[4]arene dichloromethane hemisolvate

open access: yesActa Crystallographica Section E, 2008
In the title compound, C48H64O4·0.5CH2Cl2, both crystallographically independent calixarene molecules display a partial cone conformation. Their crystal packing is stabilized by C—H...π contacts involving the methoxy groups.
Edwin Weber   +4 more
doaj   +1 more source

Influence of calixarene C-99 on contractile activity of rat large intestine smooth muscles

open access: yesБіологічні студії, 2016
The regularities of influence of new high-affinity inhibitor of plasma membrane sodium pump calixarene C-99 on the contractile activity of rat’s large intestine circular smooth muscle were studied. It was found that under preliminary complete blockage of
O. V. Tsymbalyuk
doaj   +1 more source

The chromatographic study of complexation of functionalized calix[4,8]arenes with aromatic aldehydes

open access: yesЖурнал органічної та фармацевтичної хімії, 2019
Aim. To study the Host-Guest complexation of octakis(diphenoxyphosphoryloxy)-tetramethylcalix[4]resorcinarene (PRA), 5,17-bis(N-tolyl-iminomethyl)-25,27-dipropoxycalix[4]arene (IC4A), 5,11,17,23-tetrakis(diisopropoxyphosphonyl)-25,26,27,28-tetra ...
O. I. Kalchenko   +2 more
doaj   +1 more source

Influence of calixarene C-90 on contractile activity of rat myometrium smooth muscles

open access: yesБіологічні студії, 2013
It is known that calix[4]arene with cipher C-90 selectively and with high affinity inhibits Ca2+,Mg2+-ATPase of smooth muscle cells plasma membrane preparations.
O. V. Tsymbalyuk, S. O. Kosterin
doaj   +1 more source

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