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Issue 38, 2012
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Luminescence and upconversion from thulium(III) species in solution

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Thulium salts and complexes are shown to be emissive from three states in the excited state manifold of Tm3+. Formation of the 1D2 state can result in luminescence, or in energy transfer to the lower energy 1G4 and 3H4 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.

Graphical abstract: Luminescence and upconversion from thulium(iii) species in solution

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The article was received on 02 Jul 2012, accepted on 14 Aug 2012 and first published on 14 Aug 2012

Article type: Paper
DOI: 10.1039/C2CP42228J
Citation: Phys. Chem. Chem. Phys., 2012,14, 13378-13384

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    Luminescence and upconversion from thulium(III) species in solution

    O. A. Blackburn, M. Tropiano, T. J. Sørensen, J. Thom, A. Beeby, L. M. Bushby, D. Parker, L. S. Natrajan and S. Faulkner, Phys. Chem. Chem. Phys., 2012, 14, 13378
    DOI: 10.1039/C2CP42228J

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