Don’t help them to bury the light. The interplay between intersystem crossing and hydrogen transfer in photoexcited curcumin revealed by surface-hopping dynamics
Raúl Losantos, Andréea Pasc, Antonio Monari
Abstract
. the most stable tautomer of curcumin. Most notably, we show that while hydrogen transfer is ultrafast and happens in the sub-ps regime, intersystem crossing is still present, as shown by the non-negligible population of the triplet state manifold after 2 ps. Hence, while the hydrogen transfer channel can act as a deactivating channel, curcumin, also in the red-shifted absorption enol form, can still be regarded as potentially favorable for photodynamic therapy applications.
Topics & Concepts
Intersystem crossingPhotochemistryCurcuminChemistryChemical physicsUltrafast laser spectroscopyPhysicsSpectroscopyAtomic physicsSinglet stateExcited stateQuantum mechanicsBiochemistryPorphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer StudiesPhotodynamic Therapy Research Studies