Decorrelated singlet and triplet exciton delocalization in acetylene-bridged Zn-porphyrin dimers.

ABSTRACT: The controlled delocalization of molecular excitons remains an important goal towards the application of organic chromophores in processes ranging from light-initiated chemical transformations to classical and quantum information processing. In this study, we present a methodology to couple optical and magnetic spectroscopic techniques and assess the delocalization of singlet and triplet excitons in model molecular chromophores. By comparing the steady-state and time-resolved optical spectra of Zn-porphyrin monomers and weakly coupled dimers, we show that we can use the identity of substituents bound at specific positions of the macromolecules' rings to control the inter-ring delocalization of singlet excitons stemming from their B states through acetylene bridges. While broadened steady-s

SUBMITTER: Medagedara H 

PROVIDER: S-EPMC10829018 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature