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Authors: Gharaati, Shadab
Wang, Cui
Förster, Christoph
Weigert, Florian
Resch-Genger, Ute
Heinze, Katja
Title: Triplet–triplet annihilation upconversion in a MOF with acceptor-filled channels
Online publication date: 30-May-2022
Language: english
Abstract: Photon upconversion has enjoyed increased interest in the last years due to its high potential for solar-energy harvesting and bioimaging. A challenge for triplet–triplet annihilation upconversion (TTA-UC) processes is to realize these features in solid materials without undesired phase segregation and detrimental dye aggregation. To achieve this, we combine a palladium porphyrin sensitizer and a 9,10-diphenylanthracene annihilator within a crystalline mesoporous metal–organic framework using an inverted design. In this modular TTA system, the framework walls constitute the fixed sensitizer, while caprylic acid coats the channels providing a solventlike environment for the mobile annihilator in the channels. The resulting solid material shows green-to-blue delayed upconverted emission with a luminescence lifetime of 373±5 μs, a threshold value of 329 mW cm−2 and a triplet–triplet energy transfer efficiency of 82 %. The versatile design allows straightforward changing of the acceptor amount and type.
DDC: 540 Chemie
540 Chemistry and allied sciences
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 09 Chemie, Pharmazie u. Geowissensch.
Place: Mainz
Version: Published version
Publication type: Zeitschriftenaufsatz
License: CC BY-NC
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Journal: Chemistry - a European journal
Pages or article number: 1003
Publisher: Wiley-VCH
Publisher place: Weinheim
Issue date: 2020
ISSN: 1521-3765
Publisher DOI: 10.1002/chem.201904945
Appears in collections:JGU-Publikationen

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