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Issue 11, 2016
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Neighbour-sensitized near-infrared emission of new Nd(III) and Er(III) complexes with 1-(anthracene-2-yl)-4,4,4-trifluoro-1,3-butanedione

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Abstract

The photophysical properties of Nd(2-ATFB)3 and Er(2-ATFB)3 (2-ATFB = 1-(anthracene-2-yl)-4,4,4-trifluoro-1,3-butanedione) were investigated in various organic solvents. The Nd(III) and Er(III) complexes excited by near-UV light emitted near-infrared (NIR) emission from the lanthanide ions via energy transfer from the singlet excited states of the anthracene moiety to the resonance levels of the metal ions. The quantum yields of the sensitized NIR luminescence were estimated from the observed lifetimes of NIR luminescence. The efficiency of the sensitized NIR luminescence increased with increasing polarity of the solvent except for methanol: the OH group of methanol acted as a quencher. Quantum mechanical calculations were performed on the optimization of the model Gd(2-ATFB)3 molecule and the configurational interaction singlet (CIS) using a coordinate 2-ATFB anion adapted from the optimized structure. The nature of the excited state of the 2-ATFB ligand as an energy donor in the complex was proposed.

Graphical abstract: Neighbour-sensitized near-infrared emission of new Nd(iii) and Er(iii) complexes with 1-(anthracene-2-yl)-4,4,4-trifluoro-1,3-butanedione

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Publication details

The article was received on 30 Mar 2016, accepted on 30 Sep 2016 and first published on 30 Sep 2016


Article type: Paper
DOI: 10.1039/C6NJ00999A
Citation: New J. Chem., 2016,40, 9702-9710
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    Neighbour-sensitized near-infrared emission of new Nd(III) and Er(III) complexes with 1-(anthracene-2-yl)-4,4,4-trifluoro-1,3-butanedione

    J. Kang, K. T. Leung, M. Nah, J. Shin, M. Kang, B. Shong, J. Kang, J. Lee and Y. Sohn, New J. Chem., 2016, 40, 9702
    DOI: 10.1039/C6NJ00999A

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