The potential of pyridine-2,6-dicarboxylic acid based organolanthanide complexes for efficient near-infrared emission

Richard J. Curry; Michael R. George; Martin C. Grossel

doi:10.1117/12.617079

9 October 2005 The potential of pyridine-2,6-dicarboxylic acid based organolanthanide complexes for efficient near-infrared emission

Richard J. Curry, Michael R. George, Martin C. Grossel

Author Affiliations +

Proceedings Volume 5937, Organic Light-Emitting Materials and Devices IX; 59371R (2005) https://doi.org/10.1117/12.617079
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

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 ⁴F_3/2 → ⁴I_9/2, ⁴F_3/2 → ⁴I_11/2, and ⁴F_13/2 → ⁴I_9/2 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.

Citation Download Citation

Richard J. Curry, Michael R. George, and Martin C. Grossel "The potential of pyridine-2,6-dicarboxylic acid based organolanthanide complexes for efficient near-infrared emission", Proc. SPIE 5937, Organic Light-Emitting Materials and Devices IX, 59371R (9 October 2005); https://doi.org/10.1117/12.617079

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