An automatic molecular dispenser of chloride.

Authors :: Alibrandi G
Amendola V
Bergamaschi G
Dollenz R
Fabbrizzi L
Licchelli M
Lo Vecchio C
Source :: Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2013 Mar 11; Vol. 19 (11), pp. 3729-34. Date of Electronic Publication: 2013 Jan 31.
Publication Year :: 2013
Abstract: 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.<br /> (Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)