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Volume 16, Issue 1, Pages 29-35

Enhancement of Eu3+ emission in solution by bulky chelating ligands and deuterium substitution

Mohammed A. Zaitoun

Department of Chemistry, Mutah University, Karak, Jordan

Copyright © 2002 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Binding the europium ion with a bulky chelating ligand provides one strategy for minimizing the quenching effects of water on the luminescence of the ion. 1,4,8,11-tetraazacyclotetradecane-1,4,8,11-tetraaceticacid tetrahydrochloride (TTT) was used as a chelating agent to isolate Eu3+ from hydroxyl deactivation in water. A large enhancement in the Eu3+ emission was observed for the chelated Eu3+ compared to the unchelated. Absorption and emission spectra are reported together with lifetime measurements. The latter were used to study concentration quenching and quenching by water.