Luminescence and upconversion from thulium(III) species in solution.
Identifieur interne : 000601 ( Ncbi/Curation ); précédent : 000600; suivant : 000602Luminescence and upconversion from thulium(III) species in solution.
Auteurs : Octavia A. Blackburn [Royaume-Uni] ; Manuel Tropiano ; Thomas Just S Rensen ; James Thom ; Andrew Beeby ; Lisa M. Bushby ; David Parker ; Louise S. Natrajan ; Stephen FaulknerSource :
- Physical chemistry chemical physics : PCCP [ 1463-9084 ] ; 2012.
Abstract
Thulium salts and complexes are shown to be emissive from three states in the excited state manifold of Tm(3+). Formation of the (1)D(2) state can result in luminescence, or in energy transfer to the lower energy (1)G(4) and (3)H(4) emissive states. Where chromophores are present in the ligand structure, emission is restricted to thulium centred emissive states that are lower in energy than the chromophore centred donor state. We have also observed direct multi-photon excitation of the thulium excited state manifold. Furthermore, additional transitions are observed in the multi-photon excitation spectra that are consistent with upconversion as a consequence of sequential single photon absorption and relaxation processes within the thulium excited state manifold.
DOI: 10.1039/c2cp42228j
PubMed: 22941389
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<front><div type="abstract" xml:lang="en">Thulium salts and complexes are shown to be emissive from three states in the excited state manifold of Tm(3+). Formation of the (1)D(2) state can result in luminescence, or in energy transfer to the lower energy (1)G(4) and (3)H(4) emissive states. Where chromophores are present in the ligand structure, emission is restricted to thulium centred emissive states that are lower in energy than the chromophore centred donor state. We have also observed direct multi-photon excitation of the thulium excited state manifold. Furthermore, additional transitions are observed in the multi-photon excitation spectra that are consistent with upconversion as a consequence of sequential single photon absorption and relaxation processes within the thulium excited state manifold.</div>
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