Steering the Ultrafast Opening and Closure Dynamics of a Photochromic Coordination Cage by Guest Molecules.

Autor: Artmann K; Institut für Physikalische und Theoretische Chemie, Universität Regensburg, 93040, Regensburg, Germany., Li RJ; Department of Chemistry and Chemical Biology, TU Dortmund University, 44227, Dortmund, Germany., Juber S; Theoretical Chemistry, Ruhr University Bochum, 44780, Bochum, Germany., Benchimol E; Department of Chemistry and Chemical Biology, TU Dortmund University, 44227, Dortmund, Germany., Schäfer LV; Theoretical Chemistry, Ruhr University Bochum, 44780, Bochum, Germany., Clever GH; Department of Chemistry and Chemical Biology, TU Dortmund University, 44227, Dortmund, Germany., Nuernberger P; Institut für Physikalische und Theoretische Chemie, Universität Regensburg, 93040, Regensburg, Germany.
Jazyk: angličtina
Zdroj: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2022 Dec 05; Vol. 61 (49), pp. e202212112. Date of Electronic Publication: 2022 Nov 02.
DOI: 10.1002/anie.202212112
Abstrakt: Photochemical studies on supramolecular hosts that can encapsulate small guest molecules commonly focus on three aspects: photoswitching the cage to release or trap the guest, the effect of the confining environment on the guest, and light-induced exciton or charge transfer within the cage structure. Here, we exploit ultrafast spectroscopy to address how the guest alters the photoswitching characteristics of the cage. For this, the impacts of three disparate guest compounds on ring-opening or ring-closure of a dithienylethene (DTE) ligand in a photoswitchable DTE-based coordination cage are juxtaposed. The guest modulates both outcome and timescale of the cage's photodynamics, by an interplay of structural strain, heavy-atom effect, and enhancement of charge-transfer processes exercised by the guest on the photo-excited cage. The approach might prove beneficial for attuning the applicability of photoswitchable nanocontainers and desired guest compounds.
(© 2022 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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