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

Article type: Research Article

Authors: Zaitoun, Mohammed A.

Affiliations: Department of Chemistry, Mutah University, Karak, Jordan E‐mail: zaitoun@mutah.edu.jo

Abstract: 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.

Journal: Spectroscopy, vol. 16, no. 1, pp. 29-35, 2002