AI Article Synopsis
- Photon upconversion (UC) is an exciting process with potential applications, but previous methods faced challenges like low quantum yields and structural limitations.
- Researchers developed a molecular cluster-aggregate (MCA) with 20 lanthanide ions to enhance UC efficiency, achieving a high quantum yield of 1.04%, particularly with the {Gd Tb Yb} configuration.
- By substituting Gd ions for Eu in the composition, the team demonstrated an effective energy transfer pathway, laying the groundwork for future applications of UC in fields like luminescence thermometry.
Article Abstract
Photon upconversion (UC) in molecular species remains a highly sought-after property with vast potential applications in many fields. Until now, a few reports on molecular upconverters are limited to demonstrating upconversion. The low UC quantum yields (QY) and nuclearities hindered the application capabilities for molecular upconverters. To overcome these limitations, we report the use of a molecular cluster-aggregate (MCA) containing 20 lanthanide ions to target Yb -Tb -based cooperative UC. Upconversion quantum yield value of 1.04×10 %, among the highest value observed for a molecular cooperative UC, was attained for the {Gd Tb Yb } composition. Substitution of Gd ions for Eu centers opens a Yb →Tb →Eu energy-transfer pathway, allowing the first proof-of-concept of potential application for molecular UC. This report on upconversion-based luminescence thermometry in a molecular species endorses further development of upconversion properties of nanoscale MCAs.
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| http://dx.doi.org/10.1002/anie.202204839 | DOI Listing |
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