Ditopic Receptors Based on Dihomooxacalix[4]arenes Bearing Phenylurea Moieties With Electron-Withdrawing Groups for Anions and Organic Ion Pairs

Ditopic Receptors Based on Dihomooxacalix[4]arenes Bearing Phenylurea Moieties With Electron-Withdrawing Groups for Anions and Organic Ion Pairs

Two bidentate dihomooxacalix[4]arene receptors bearing phenylurea moieties substituted with electron-withdrawing groups at the lower rim via a butyl spacer (CF3-Phurea 5b and NO2 Phurea 5c) were obtained in the cone conformation in solution, as shown by NMR. The X-ray crystal structure of 5b is repo...

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Bibliographic Details
Main Authors: Alexandre S. Miranda, Defne Serbetci, Paula M. Marcos, José R. Ascenso, Mário N. Berberan-Santos, Neal Hickey, Silvano Geremia
Format: Article
Language:English
Published: Frontiers Media S.A. 2019-11-01
Series:Frontiers in Chemistry
Subjects:
dihomooxacalix[4]arenes
phenylurea anion receptors
biogenic amine hydrochlorides
ditopic receptors
proton NMR titrations
UV-Vis absorption studies
Online Access:https://www.frontiersin.org/article/10.3389/fchem.2019.00758/full

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https://www.frontiersin.org/article/10.3389/fchem.2019.00758/full

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