A photo-switchable molecular capsule: sequential photoinduced processes - Université de Lille
Article Dans Une Revue Chemical Science Année : 2022

A photo-switchable molecular capsule: sequential photoinduced processes

Résumé

The metastable trilacunary heteropolyoxomolybdate [PMo9O31(py)3]3− – {PMo9}; py = pyridine) and the ditopic pyridyl bearing diarylethene (DAE) (C25H16N2F6S2) self-assemble via a facile ligand replacement methodology to yield the photo-active molecular capsule [(PMo9O31)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.
Fichier principal
Vignette du fichier
d2sc04613j.pdf (1.97 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-04509344 , version 1 (18-03-2024)

Licence

Identifiants

Citer

Manjiri Choudhari, Jingjing Xu, Alasdair I. Mckay, Clement Guerrin, Craig Forsyth, et al.. A photo-switchable molecular capsule: sequential photoinduced processes. Chemical Science, 2022, Chemical Science, 46 (13), pp.13732-13740. ⟨10.1039/d2sc04613j⟩. ⟨hal-04509344⟩
5 Consultations
2 Téléchargements

Altmetric

Partager

More