A highly contorted push-pull naphthalenediimide dimer and evidence of intramolecular singlet exciton fission.

ABSTRACT: Singlet fission is a process by which two molecular triplet excitons are generated subsequent to the absorption of one photon. Molecules that enable singlet fission have triplet state energy at least half of the bright singlet state energy. This stringent energy criteria have challenged chemists to device new molecular and supramolecular design principles to modulate the singlet-triplet energy gap and build singlet fission systems from a wide range of organic chromophores. Herein, we report for the first time intramolecular singlet fission in the seminal naphthalenediimide (NDI) scaffold constrained in a push-pull cyclophane architecture, while individually the NDI chromophore does not satisfy the energy criterion. The challenging synthesis of this highly contorted push-pull cyclophane is

SUBMITTER: Bansal D 

PROVIDER: S-EPMC9555572 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature