Efficient Energy Transfer from Near-Infrared Emitting Gold Nanoparticles to Pendant Ytterbium(III).

Author(s) Crawford, S.E.; Andolina, C.M.; Kaseman, D.C.; Ryoo, B.Hyung; Smith, A.M.; Johnston, K.A.; Millstone, J.E.
Journal J Am Chem Soc
Date Published 2017 Dec 13
Abstract

Here, we demonstrate efficient energy transfer from near-infrared-emitting ortho-mercaptobenzoic acid-capped gold nanoparticles (AuNPs) to pendant ytterbium(III) cations. These functional materials combine the high molar absorptivity (1.21 × 106 M-1 cm-1) and broad excitation features (throughout the UV and visible regions) of AuNPs with the narrow emissive properties of lanthanides. Interaction between the AuNP ligand shell and ytterbium is determined using both nuclear magnetic resonance and electron microscopy measurements. In order to identify the mechanism of this energy transfer process, the distance of the ytterbium(III) from the surface of the AuNPs is systematically modulated by changing the size of the ligand appended to the AuNP. By studying the energy transfer efficiency from the various AuNP conjugates to pendant ytterbium(III) cations, a Dexter-type energy transfer mechanism is suggested, which is an important consideration for applications ranging from catalysis to energy harvesting. Taken together, these experiments lay a foundation for the incorporation of emissive AuNPs in energy transfer systems.

DOI 10.1021/jacs.7b11220
ISSN 1520-5126
Citation Crawford SE, Andolina CM, Kaseman DC, Ryoo BH, Smith AM, Johnston KA, et al. Efficient Energy Transfer from Near-Infrared Emitting Gold Nanoparticles to Pendant Ytterbium(III). J Am Chem Soc. 2017;139(49):17767-17770.

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