A new azophenol type chromogenic ionophore based on the p-tert-butylcalix[4]arenediazacrown ether was prepared: the ionophore exhibited a pronouncedly selective chromogenic behaviour toward Hg2+ ions among the surveyed guests of alkali, alkaline earth, transition and heavy metal ions in liquid–liquid extraction experiments.
![Graphical abstract: A new Hg-selective chromoionophore based on calix[4]arenediazacrown ether](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=B101112J&imageInfo.ImageIdentifier.Year=2001)
A new Hg2+-selective chromoionophore based on calix[4]arenediazacrown ether
M. J. Choi, M. Y. Kim and S. Chang, Chem. Commun., 2001, 1664 DOI: 10.1039/B101112J
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