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Proceedings Paper

The potential of pyridine-2,6-dicarboxylic acid based organolanthanide complexes for efficient near-infrared emission
Author(s): Richard J. Curry; Michael R. George; Martin C. Grossel
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Paper Abstract

We presented detailed spectroscopic data obtained from Nd3+ pyridine-2,6-dicarboxylic acid based complexes in which the 4-position of the pyridine ring has been substituted with OH and Cl. In each case the ligands formed stable complexes with the Nd3+ ion without the requirement for any additional 'neutral' ligand to satisfy the 8-9 coordination requirement of the lanthanide ion. Photoluminescence is observed from both the ligand (centered ~700 nm) and the Nd3+ ion (at ~900 nm, 1064 nm, and 1320 nm due to the 4F3/24I9/2, 4F3/24I11/2, and 4F13/24I9/2 transitions respectively) following excitation in the low energy tail of the ligand π → π* absorption. The intensity of the ligand emission and sensitized Nd3+ emission was found to be dependent on the substituted 4-position of the pyridine ring. The origin of the observed phenomena are discussed in relation to the energy transfer process from ligand to Nd3+ ion and the nonradiative relaxation of the sensitized Nd3+ ion. These results suggest that further modification of the ligand through complete halogenation and/or addition of other functional groups may provide an attractive route to obtaining an efficient near-infrared emitting organolanthanide complex.

Paper Details

Date Published: 9 October 2005
PDF: 9 pages
Proc. SPIE 5937, Organic Light-Emitting Materials and Devices IX, 59371R (9 October 2005); doi: 10.1117/12.617079
Show Author Affiliations
Richard J. Curry, Univ. of Surrey (United Kingdom)
Michael R. George, Univ. of Southampton (United Kingdom)
Martin C. Grossel, Univ. of Southampton (United Kingdom)

Published in SPIE Proceedings Vol. 5937:
Organic Light-Emitting Materials and Devices IX
Zakya H. Kafafi; Paul A. Lane, Editor(s)

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