Molecular and Supramolecular Upconversion

A special issue of Chemistry (ISSN 2624-8549). This special issue belongs to the section "Photochemistry and Photophysics".

Deadline for manuscript submissions: closed (15 February 2022) | Viewed by 3153

Special Issue Editor

Equipe de Synthèse Pour l'Analyse (SynPA), Institut Pluridisciplinaire Hubert Curien (IPHC), UMR 7178 CNRS/UdS, ECPM, Bâtiment R1N0 25, rue Becquerel, 67087 Strasbourg CEDEX 2, France
Interests: spectroscopy; lanthanides; upconversion; supramolecular chemistry; bioanalytical chemistry

Special Issue Information

Dear Colleagues,

For a long time considered restricted to solid state materials and nanoparticles, photonic upconversion, in which low energy photons are piled up and restored as photons at higher energy, has recently reached the molecular scale with discrete molecular and supramolecular upconverting devices. This Special Issue aims at providing the most recent trends in this new area and will address the different aspects of molecular design, supramolecular assembling and fundamental photo-physical aspects of upconversion at the nanometer scale.

Dr. Loïc Charbonnière
Guest Editor

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Keywords

  • upconversion
  • molecular design
  • supramolecules
  • spectroscopy

Published Papers (1 paper)

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Research

11 pages, 2556 KiB  
Article
Yb to Tb Cooperative Upconversion in Supramolecularly Assembled Complexes in a Solution
by Lohona K. Soro, Cyrille Charpentier, Frédéric Przybilla, Yves Mély, Aline M. Nonat and Loïc J. Charbonnière
Chemistry 2021, 3(3), 1037-1046; https://0-doi-org.brum.beds.ac.uk/10.3390/chemistry3030074 - 06 Sep 2021
Cited by 3 | Viewed by 2519
Abstract
The podand-type ligand L, based on a tertiary amine substituted by three pyridyl-6-phosphonic acid functions, forms hydrated complexes with Ln3+ cations. The luminescence properties of the YbL complex were studied in D2O as a function of the pD and temperature. [...] Read more.
The podand-type ligand L, based on a tertiary amine substituted by three pyridyl-6-phosphonic acid functions, forms hydrated complexes with Ln3+ cations. The luminescence properties of the YbL complex were studied in D2O as a function of the pD and temperature. In basic conditions, increases in the luminescence quantum yield and the excited state lifetime of the Yb centered emission associated with the 2F5/22F7/2 transition were observed and attributed to a change in the hydration number from two water molecules in the first coordination sphere of Yb at acidic pH to a single one in basic conditions. Upon the addition of TbCl3 salts to a solution containing the YbL complex in D2O, heteropolynuclear Yb/Tb species formed, and excitation of the Yb at 980 nm resulted in the observation of the typical visible emission of Tb as a result of a cooperative upconversion (UC) photosensitization process. The UC was further evidenced by the quadratic dependence of the UC emission as a function of the laser power density. Full article
(This article belongs to the Special Issue Molecular and Supramolecular Upconversion)
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