A photo-switchable molecular capsule: sequential photoinduced processes.

Autor: Choudhari M; School of Chemistry, Monash University Clayton Victoria 3800 Australia chris.ritchie@monash.edu., Xu J; School of Chemistry, Monash University Clayton Victoria 3800 Australia chris.ritchie@monash.edu.; College of Chemistry and Materials Science, Shanghai Normal University Shanghai 200234 China., McKay AI; School of Chemistry, Monash University Clayton Victoria 3800 Australia chris.ritchie@monash.edu., Guerrin C; Université de Lille, CNRS, UMR 8516 - LASIRE - Laboratoire de Spectroscopie pour les Interactions, la Réactivité et l'Environnement Lille F-59000 France., Forsyth C; School of Chemistry, Monash University Clayton Victoria 3800 Australia chris.ritchie@monash.edu., Ma HZ; School of Chemistry, University of Melbourne Melbourne 3010 Victoria Australia., Goerigk L; School of Chemistry, University of Melbourne Melbourne 3010 Victoria Australia., O'Hair RAJ; School of Chemistry, University of Melbourne Melbourne 3010 Victoria Australia., Bonnefont A; Laboratoire d'Electrochimie et Chimie Physique du Corps Solide, Institut de Chimie de Strasbourg, UMR 7177 CNRS-Université de Strasbourg 4, rue Blaise Pascal Strasbourg 67000 France., Ruhlmann L; Laboratoire d'Electrochimie et Chimie Physique du Corps Solide, Institut de Chimie de Strasbourg, UMR 7177 CNRS-Université de Strasbourg 4, rue Blaise Pascal Strasbourg 67000 France., Aloise S; Université de Lille, CNRS, UMR 8516 - LASIRE - Laboratoire de Spectroscopie pour les Interactions, la Réactivité et l'Environnement Lille F-59000 France., Ritchie C; School of Chemistry, Monash University Clayton Victoria 3800 Australia chris.ritchie@monash.edu.
Jazyk: angličtina
Zdroj: Chemical science [Chem Sci] 2022 Oct 24; Vol. 13 (46), pp. 13732-13740. Date of Electronic Publication: 2022 Oct 24 (Print Publication: 2022).
DOI: 10.1039/d2sc04613j
Abstrakt: The metastable trilacunary heteropolyoxomolybdate [PMo 9 O 31 (py) 3 ] 3- - {PMo 9 }; py = pyridine) and the ditopic pyridyl bearing diarylethene (DAE) (C 25 H 16 N 2 F 6 S 2 ) self-assemble via a facile ligand replacement methodology to yield the photo-active molecular capsule [(PMo 9 O 31 ) 2 (DAE) 3 ] 6- . The spatial arrangement and conformation of the three DAE ligands are directed by the surface chemistry of the molecular metal oxide precursor with exclusive ligation of the photo-active antiparallel rotamer to the polyoxometalate (POM) while the integrity of the assembly in solution has been verified by a suite of spectroscopic techniques. Electrocyclisation of the three DAEs occurs sequentially and has been investigated using a combination of steady-state and time-resolved spectroscopies with the discovery of a photochemical cascade whereby rapid photoinduced ring closure is followed by electron transfer from the ring-closed DAE to the POM in the latent donor-acceptor system on subsequent excitation. This interpretation is also supported by computational and detailed spectroelectrochemical analysis. Ring-closing quantum yields were also determined using a custom quantum yield determination setup (QYDS), providing insight into the impact of POM coordination on these processes.
Competing Interests: The authors declare no conflict of interests.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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