Quantum chain amplification in nanocrystalline Dewar benzenes by intramolecular sensitization.

ABSTRACT: Quantum chain reactions are characterized by the formation of several photoproducts per photon absorbed (Φ_QC > 1) and constitute a promising signal amplification mechanism. The triplet-sensitized isomerization of Dewar benzene is known to undergo quantum chain reactions characterized by an adiabatic valence-bond isomerization to the excited state of Hückel benzene, which is able to transfer its triplet energy to a new ground state Dewar benzene that reacts to continue the chain. Given that diffusion-mediated energy transfer is the chain-limiting event in solution, we demonstrate here that reactions in crystals are significantly more efficient by taking advantage of energy transfer by a presumed exciton delocalization mechanism. Using Dewar benzenes with covalently attache

SUBMITTER: Rivera E 

PROVIDER: S-EPMC10231335 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature