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An Automatic Molecular Dispenser of Chloride
Author(s) -
Alibrandi Giuseppe,
Amendola Valeria,
Bergamaschi Greta,
Dollenz Riccardo,
Fabbrizzi Luigi,
Licchelli Maurizio,
Lo Vecchio Carmelo
Publication year - 2013
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201203933
Subject(s) - cryptand , chloride , ion , chemistry , inorganic chemistry , organic chemistry
The combined activity of the 1.1.1‐cryptand and of a dicopper(II) bistren cryptate complex including chloride makes the Cl − ion be continuously and slowly delivered to the solution, without any external intervention. The 1.1.1‐cryptand slowly releases OH − ions, according to a defined kinetics, and each OH − ion displaces a Cl − ion from the cryptate. Chloride displacement induces a sharp colour change from bright yellow to aquamarine and can be conveniently monitored spectrophotometrically, even in diluted solutions. The 1.1.1‐cryptand is the motor of a molecular dispenser (the dicopper(II) cryptate) delivering chloride ion automatically, from the inside of the solution.