A Strategy to Protect and Sensitize Near-Infrared Luminescent Nd3+ and Yb3+: Organic Tropolonate Ligands for the Sensitization of Ln3+-Doped NaYF4 Nanocrystals

J. Am. Chem. Soc., 129 (48), 14834 -14835, 2007. 10.1021/ja074564f S0002-7863(07)04564-7
Web Release Date: November 10, 2007

A Strategy to Protect and Sensitize Near-Infrared Luminescent Nd³⁺ and Yb³⁺: Organic Tropolonate Ligands for the Sensitization of Ln³⁺-Doped NaYF₄ Nanocrystals

Jian Zhang, Chad M. Shade, Demetra A. Chengelis, and Stéphane Petoud*

Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260

spetoud@pitt.edu

Received June 21, 2007

Revised Manuscript Received October 12, 2007

Abstract:

A strategy to sensitize and protect near-infrared (NIR) emitting Nd³⁺ and Yb³⁺ is presented. Combining protection provided by the inorganic matrix of NaYF₄ nanocrystals and sensitization from tropolonate ligands capped on their surface, the lanthanide cation centered luminescence was observed through the ligand excitation. The extended lanthanide luminescence lifetimes indicate the success of this strategy.

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