Wydział Chemii

Mirosław Karbowiak

Jakub Cichos

Katarzyna A. Buczko

2014

Journal of Rare Earths

32

282-287

10.1016/S1002-0721(14)60066-1

Naukowa

Angielski

Artykuł

The interaction of TbCl₃ and lanthanide(III) β-diketonate complexes with poly(N-vinylpyrrolidone) (PVP) polymer was studied using fluorescence spectroscopy. In the presence of PVP the emission of Tb³⁺ in ethanolic solution of TbCl₃ significantly increased owing to the excitation energy transfer from PVP to Tb³⁺ ions, which was more efficient as compared to a direct excitation of the Tb³⁺ 4f⁷5d¹ levels. In contrast, emission of NEt₄Tb(hfa)₄ and NEt₄Eu(hfa)₄ complexes was almost completely quenched in solution containing PVP. The PVP bound both Ln³⁺ ions and hfa ligands which caused decomposition of Ln-hfa complexes and switched off the excitation energy transfer from the ligand to the emitting Ln³⁺ ion. The important role of hydrogen bonds in stabilization of interaction of hfa ligands with PVP was indicated.

Ln³⁺ ions and β-diketonate ligands strongly interact with poly(N-vinylpyrrolido ne) (PVP) polymer in solution

poly(N-vinylpyrrolidone), PVP, lanthanide(III), TbCl3, emission quenching, rare earths

http://dx.doi.org/10.1016/S1002-0721(14)60066-1

http://www.elsevier.com