Add time:08/07/2019         Source:sciencedirect.com

The terbium ethylenediaminetetra-acetate anion forms a 1:1 mixed ligand complex with the trivalent anion derived from 5-sulphosalicyclic acid. Ultra-violet radiation absorbed by the organic portion of the mixed complex is efficiently converted to the green fluorescence characteristic of Tb3+. Quantum efficiency for conversion is greater in D2O than in H2O solution and is essentially unity in the former solvent at room temperature. The corresponding mixed complex derived from europium ethylenediaminetetra-acetate does not fluoresce.

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