Diarylethene Isomerization by Using Triplet–Triplet Annihilation Photon Upconversion
Artikel i vetenskaplig tidskrift, 2023

Green-to-blue triplet–triplet annihilation photon upconversion with the well-studied upconversion pair 9,10-diphenylanthracene (DPA)/platinum octaethylporphyrin (PtOEP) was used to reversibly drive the photoisomerization of diarylethene (DAE) photoswitches by using visible light. By carefully selecting the kinetic and spectral properties of the molecular system as well as the experimental geometry, a single green light source can be used to selectively trigger both the ring-opening and the ring-closing reactions, whilst also inducing fluorescence from the colored closed isomer that can be used as a readout to monitor the isomerization process in situ. The upconversion solution and the DAE solution are kept physically separated, allowing them to be characterized both concomitantly and individually without further separation processes. The ring-closing reaction using upconverted photons was quantified and compared to the efficiency of direct isomerization with ultraviolet light.


photon upconversion



triplet-triplet annihilation


Wera Larsson

Chalmers, Kemi och kemiteknik, Kemi och biokemi

Masakazu Morimoto

Rikkyo University

Masahiro Irie

Rikkyo University

Joakim Andreasson

Chalmers, Kemi och kemiteknik, Kemi och biokemi

Bo Albinsson

Chalmers, Kemi och kemiteknik, Kemi och biokemi

Chemistry - A European Journal

0947-6539 (ISSN) 1521-3765 (eISSN)

Vol. 29 13

Molekylära fotoswitchar för fluorescensmikroskopi bortom upplösningssgränsen

Vetenskapsrådet (VR) (2021-05311), 2022-01-01 -- 2025-12-31.


Fysikalisk kemi

Atom- och molekylfysik och optik





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