Damming a Molecular Energy Reservoir: Ion-regulated Electronic Energy Shuttling in a [2]Rotaxane
2021
Bidirectional
electronic energy shuttling is shown to occur between the molecular ring and
axle components of a rotaxane. The engineered energetic and kinetic parameters
give rise to long-lived, delayed luminescence.
Perturbation of the quasi-isoenergetic ring and stopper chromophore
excited-state energy levels upon cation binding influences the energy shuttling
process, and hence luminescence read-out, representing a new potential
mechanism in luminescent molecular chemosensor development
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