Publications associated with Quantum Spin Dynamics

Acuminated fluorescence of Er<sup>3 +</sup>centres in endohedral fullerenes through the incarceration of a carbide cluster

Chemical Physics Letters 476 (2009) 41-45

SR Plant, G Dantelle, Y Ito, TC Ng, A Ardavan, H Shinohara, RA Taylor, GAD Briggs, K Porfyrakis

Photoluminescence spectroscopic measurements have allowed the acquisition of high resolution spectra at low temperature for the endohedral metallofullerenes, Er 2 @ C 82 (isomer I) and Er 2 C 2 @ C 82 (isomer I). The characteristic emission in the 1.5-1.6 μm region corresponds to the 4 I 13 / 2 (m) → 4 I 15 / 2 (n) transitions of the Er 3 + ion for both molecules. The emission arising from Er 2 C 2 @ C 82 (I) appears acuminated (narrow lines that taper to a point) when compared with that of Er 2 @ C 82 (I). The Er 2 C 2 @ C 82 (I) emission linewidths are comparable to those found in crystals, making this molecule of interest for applications where accessible, well-defined quantum states are required. © 2009 Elsevier B.V. All rights reserved.

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