Using sulfur bridge oxidation to control electronic coupling and photochemistry in covalent anthracene dimers.

ABSTRACT: Covalently tethered bichromophores provide an ideal proving ground to develop strategies for controlling excited state behavior in chromophore assemblies. In this work, optical spectroscopy and electronic structure theory are combined to demonstrate that the oxidation state of a sulfur linker between anthracene chromophores gives control over not only the photophysics but also the photochemistry of the molecules. Altering the oxidation state of the sulfur linker does not change the geometry between chromophores, allowing electronic effects between chromophores to be isolated. Previously, we showed that excitonic states in sulfur-bridged terthiophene dimers were modulated by electronic screening of the sulfur lone pairs, but that the sulfur orbitals were not directly involved in these state

SUBMITTER: Cruz CD 

PROVIDER: S-EPMC6713866 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature