Volume 56, Issue 15 pp. 4356-4360
Communication

Stabilization of High Oxidation State Upconversion Nanoparticles by N-Heterocyclic Carbenes

Nadja Möller

Nadja Möller

Westfälische Wilhelms-Universität Münster, Organisch-Chemisches Institut, Corrensstrasse 40, 4, 8149 Münster, Germany

These authors contributed equally to this work.

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Andreas Rühling

Andreas Rühling

Westfälische Wilhelms-Universität Münster, Organisch-Chemisches Institut, Corrensstrasse 40, 4, 8149 Münster, Germany

These authors contributed equally to this work.

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Sebastian Lamping

Sebastian Lamping

Westfälische Wilhelms-Universität Münster, Organisch-Chemisches Institut, Corrensstrasse 40, 4, 8149 Münster, Germany

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Tim Hellwig

Tim Hellwig

Westfälische Wilhelms-Universität Münster, Angewandte Physik, Corrensstrasse 2, 48149 Münster, Germany

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Prof. Dr. Carsten Fallnich

Prof. Dr. Carsten Fallnich

Westfälische Wilhelms-Universität Münster, Angewandte Physik, Corrensstrasse 2, 48149 Münster, Germany

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Prof. Dr. Bart Jan Ravoo

Corresponding Author

Prof. Dr. Bart Jan Ravoo

Westfälische Wilhelms-Universität Münster, Organisch-Chemisches Institut, Corrensstrasse 40, 4, 8149 Münster, Germany

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Prof. Dr. Frank Glorius

Corresponding Author

Prof. Dr. Frank Glorius

Westfälische Wilhelms-Universität Münster, Organisch-Chemisches Institut, Corrensstrasse 40, 4, 8149 Münster, Germany

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First published: 16 March 2017
Citations: 46

Graphical Abstract

Up, up, and carbene: High oxidation state NaYF4:Yb,Tm upconversion nanoparticles (UCNPs) were stabilized by N-heterocyclic carbenes (NHCs) through a ligand-exchange reaction from a well-defined precursor and characterized in detail. The ligands for such nanoparticles require different properties compared to elemental metal nanoparticles. This new photoactive material was employed in reactions of photoresponsive molecules.

Abstract

The stabilization of high oxidation state nanoparticles by N-heterocyclic carbenes is reported. Such nanoparticles represent an important subset in the field of nanoparticles, with different and more challenging requirements for suitable ligands compared to elemental metal nanoparticles. N-Heterocyclic carbene coated NaYF4:Yb,Tm upconversion nanoparticles were synthesized by a ligand-exchange reaction from a well-defined precursor. This new photoactive material was characterized in detail and employed in the activation of photoresponsive molecules by low-intensity near-infrared light (λ=980 nm).

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