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Lanthanide‐Based Molecular Cluster‐Aggregates: Optical Barcoding and White‐Light Emission with Nanosized {Ln 20 } Compounds
Author(s) -
Gálico Diogo A.,
Kitos Alexandros A.,
Ovens Jeffrey S.,
Sigoli Fernando A.,
Murugesu Muralee
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202013867
Subject(s) - cluster (spacecraft) , lanthanide , counterfeit , nanoparticle , materials science , white light , luminescence , composition (language) , nanotechnology , chemistry , optoelectronics , computer science , organic chemistry , ion , linguistics , philosophy , political science , law , programming language
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 [Ln 20 (chp) 30 (CO 3 ) 12 (NO 3 ) 6 (H 2 O) 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 Gd III , Tb III , and Eu III 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.