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Long-lived near-infrared luminescent lanthanide complexes of imidodiphosphinate "shell" ligands

Bassett, Andrew P., Van Deun, Rik, Nockemann, Peter, Glover, Peter B., Kariuki, Benson, Van Hecke, Kristof, Van Meervelt, Luc and Pikramenou, Zoe 2005. Long-lived near-infrared luminescent lanthanide complexes of imidodiphosphinate "shell" ligands. Inorganic Chemistry 44 (18) , pp. 6140-6142. 10.1021/ic0482436

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Near-infrared emitting complexes of Nd(III), Er(III), and Yb(III) based on hexacoordinate lanthanide ions with an aryl functionalized imidodiphosphinate ligand, tpip, have been synthesized and fully characterized. Three tpip ligands form a shell around the lanthanide with the ligand coordinating via the two oxygens leading to neutral complexes, Ln(tpip)3. In the X-ray crystal structures of Er(III) and Nd(III) complexes there is evidence of CH−π interactions between the phenyl groups. Photophysical investigations of solution samples of the complexes demonstrate that all complexes exhibit relatively long luminescence lifetimes in nondeuteurated solvents. Luminescence studies of powder samples have also been recorded for examination of the properties of NIR complexes in the solid state for potential material applications. The results underline the effective shielding of the lanthanide by the twelve phenyl groups of the tpip ligands and the reduction of high-energy vibrations in close proximity to the lanthanide, both features important in the design of NIR emitting lanthanide complexes.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Subjects: Q Science > QD Chemistry
Publisher: American Chemical Society
Last Modified: 04 Jun 2017 04:59

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