An automatic molecular dispenser of chloride.
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.
Dipartimento di Scienze Chimiche, Università di Messina-Viale F. Stagno d'Alcontres 31, Villaggio S. Agata, 98166 Messina, Italy. galibrandi@unime.it
Giuseppe
G
Alibrandi
Valeria
V
Amendola
Greta
G
Bergamaschi
Riccardo
R
Dollenz
Luigi
L
Fabbrizzi
Maurizio
M
Licchelli
Carmelo
C
Lo Vecchio