Publication details

Mono(pyridine-N-oxide) analog of DOTA as a suitable organic reagent for a sensitive and selective fluorimetric determination of Ln(III) ions

Authors

VANĚK Jakub LUBAL Přemysl ŠEVČÍKOVÁ Romana POLÁŠEK Miloslav HERMANN Petr

Year of publication 2012
Type Article in Periodical
Magazine / Source Journal of Luminescence
MU Faculty or unit

Central European Institute of Technology

Citation
Web http://www.sciencedirect.com/science/article/pii/S0022231312001512
Doi http://dx.doi.org/10.1016/j.jlumin.2012.03.018
Field Physical chemistry and theoretical chemistry
Keywords Sensor; Ln(III) ion determination; macrocyclic ligand; spectrofluorimetry; speciation analysis; luminophore analysis
Description The mono(pyridine-N-oxide) analog of the H4dota macrocylic ligand, H3do3a-pyNO, is capable of forming thermodynamically stable and kinetically inert Ln(III) complexes. Its Eu(III) and Tb(III) complexes display a strong long-lived fluorescence as a result of the antenna effect of the pyridine- N-oxide fluorophore in the reagent. It is shown that H3do3a-pyNO can be used as a fluorogenic reagent for the determination of Eu(III) and Tb(III) at pH 6.5 and cL 1 mM. At an excitation wavelength of 286 nm, the emission maxima are 615 nm (Eu(III)-complex), and 547 nm (Tb(III)complex). Detection limits are at concentrations around 1.0 mM and linearity of the method spans over 2 orders of magnitude. The method was applied to artificial and real samples (spiked mineral waters, extracts from cathode ray tube luminophore dust) and gave satisfactory results. The method is simple, rapid, and hardly interfered by other metal ions.
Related projects:

You are running an old browser version. We recommend updating your browser to its latest version.

More info