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Issue 34, 2015
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Near-infrared (NIR) emitting Nd/Yb(iii) complexes sensitized by MLCT states of Ru(ii)/Ir(iii) metalloligands in the visible light region

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Abstract

Four Ru(II)/Ir(III) metalloligands have been designed and synthesized from polypyridine and bibenzimidazole (BiBzIm) organic ligands, which show strong visible light absorption via metal-to-ligand charge transfer (MLCT) transitions. Nd/Yb(III) complexes were further assembled from these Ru(II)/Ir(III) metalloligands, and Ln(III)-centered NIR emissions can be efficiently sensitized by 3MLCT states of the metalloligands in the visible-light region. The energy transfer rates for the complexes are generally in the order Nd > Yb, which is due to the better matching between 3MLCT states of Ru(II)/Ir(III) metalloligands and densely distributed excited states of Nd(III) ions. Long decayed lifetimes on a μs scale and high quantum yields up to 1% are obtained in these lanthanide complexes, suggesting that the Ru(II)/Ir(III) metalloligands can serve as a good visible light harvesting antenna to efficiently sensitize Ln(III)-based NIR luminescence.

Graphical abstract: Near-infrared (NIR) emitting Nd/Yb(iii) complexes sensitized by MLCT states of Ru(ii)/Ir(iii) metalloligands in the visible light region

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Article information


Submitted
06 Feb 2015
Accepted
13 Apr 2015
First published
13 Apr 2015

Dalton Trans., 2015,44, 15212-15219
Article type
Paper
Author version available

Near-infrared (NIR) emitting Nd/Yb(III) complexes sensitized by MLCT states of Ru(II)/Ir(III) metalloligands in the visible light region

L. Zhang, Y. Hou, M. Pan, L. Chen, Y. Zhu, S. Yin, G. Shao and C. Su, Dalton Trans., 2015, 44, 15212
DOI: 10.1039/C5DT00545K

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