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
Year of first publication:	2020
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
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-7034
Version:	Published version
Publication type:	Zeitschriftenaufsatz
License:	CC BY-NC
Information on rights of use:	https://creativecommons.org/licenses/by-nc/4.0/
Journal:	Chemistry - a European journal 26 5
Pages or article number:	1003 1007
Publisher:	Wiley-VCH
Publisher place:	Weinheim
Issue date:	2020
ISSN:	1521-3765
Publisher DOI:	10.1002/chem.201904945
Appears in collections:	JGU-Publikationen