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Room‐Temperature Linear Light Upconversion in a Mononuclear Erbium Molecular Complex
Author(s) -
Golesorkhi Bahman,
Nozary Homayoun,
Guénée Laure,
Fürstenberg Alexandre,
Piguet Claude
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201810022
Subject(s) - photon upconversion , erbium , lanthanide , photon , infrared , chemistry , materials science , phonon , photochemistry , optoelectronics , nanotechnology , optics , doping , physics , ion , condensed matter physics , organic chemistry
Abstract To date, the piling up of successive photons of low energies (near infrared; NIR) using a single lanthanide center and linear optics to ultimately produce upconverted visible emission was restricted to low‐phonon solid materials and nanoparticles. Now we show that the tight helical wrapping of three terdentate N‐donor ligands around a single nine‐coordinate trivalent erbium cation provides favorable conditions for a mononuclear molecular complex to exhibit unprecedented related upconverted emission. Low power NIR laser excitations into the metal‐centered transitions Er( 4 I 11/2 ← 4 I 15/2 ) at 801 nm or Er( 4 I 13/2 ← 4 I 15/2 ) at 966 nm result in upconverted blue–green emissions, where two or three photons respectively are successively absorbed by a molecular lanthanide complex possessing high‐energy vibrations.