Volume 133, Issue 11 pp. 6195-6201
Forschungsartikel

Lanthanide-Based Molecular Cluster-Aggregates: Optical Barcoding and White-Light Emission with Nanosized {Ln20} Compounds

Dr. Diogo A. Gálico

Dr. Diogo A. Gálico

Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, K1N 6N5 Canada

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Dr. Alexandros A. Kitos

Dr. Alexandros A. Kitos

Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, K1N 6N5 Canada

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Dr. Jeffrey S. Ovens

Dr. Jeffrey S. Ovens

X-Ray Core Facility, University of Ottawa, 150 Louis Pasteur, Ottawa, Ontario, K1N 6N5 Canada

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Prof. Dr. Fernando A. Sigoli

Prof. Dr. Fernando A. Sigoli

Institute of Chemistry, University of Campinas, R. Josué de Castro 126, Campinas, São Paulo, 13083-970 Brazil

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Prof. Dr. Muralee Murugesu

Corresponding Author

Prof. Dr. Muralee Murugesu

Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, K1N 6N5 Canada

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First published: 09 December 2020
Citations: 13

Dedicated to Professor Dante Gatteschi on the occasion of his 75th birthday

Abstract

Counterfeit goods represent a major problem to companies, governments, and customers, affecting the global economy. In order to protect the authenticity of products and documents, optical anti-counterfeit technologies have widely been employed via the use of discrete molecular species, extended metal–organic frameworks (MOFs), and nanoparticles. Herein, for the first time we demonstrate the potential use of molecular cluster-aggregates (MCA) as optical barcodes via composition and energy transfer control. The tuneable optical properties for the [Ln20(chp)30(CO3)12(NO3)6(H2O)6], where chp=deprotonated 6-chloro-2-pyridinol, allow the fine control of the emission colour output, resulting in high-security level optical labelling with a precise read-out. Moreover, a unique tri-doped composition of GdIII, TbIII, and EuIII led to MCAs with white-light emission. The presented methodology is a unique approach to probe the effect of composition control on the luminescent properties of nanosized molecular material.

Conflict of interest

The authors declare no conflict of interest.

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