Wydział Chemii

Paula Gawryszewska

Jerzy Sokolnicki

Anders Dossing

James P. Riehl

Gilles Muller

Janina Legendziewicz

2005

Journal of Physical Chemistry A

109

3858-3863

10.1021/jp0444666

Naukowa

Angielski

Artykuł

Absorption, emission, and excitation spectra for solid-state and solution of Tb(III), Dy(III), and Gd(III) complexes with the polypyridine ligand 6,6‘-bis[bis(2-pyridylmethyl)-aminomethyl]-2,2‘-bipyridine (C₃₆H₃₄N₈) are presented. Measurements of excited-state lifetimes and quantum yields in various solvents at room temperature and 77 K are also reported and used to characterize the excited-state energetics of this system. Special attention is given to the characterization of metal-to-ligand energy transfer efficiency and mechanisms. The measurement of circularly polarized luminescence (CPL) from the solution of the Dy(III) complex following circularly polarized excitation confirms the chiral structure of the complexes under study. No CPL is present in the luminescence from the Eu(III) or Tb(III) complex because of efficient racemization. The variation of the magnitude of the CPL as a function of temperature from an aqueous solution of DyL is used for the first time to characterize the solution equilibria between different chiral species.

Absorption, Ligands, Luminescence, Quantum yield, Solution chemistry

https://doi.org/10.1021/jp0444666

https://www.acs.org/content/acs/en.html