Interchromophoric
interactions such as Coulombic coupling and exchange
interactions are crucial to the functional properties of numerous
π-conjugated systems. Here, we use magnetic circular dichroism
(MCD) spectroscopy to investigate interchromophoric interactions in
singlet fission relevant pentacene dimers. Using a simple analytical
model, we outline a general relationship between the geometry of pentacene
dimers and their calculated MCD response. We analyze experimental
MCD spectra of different covalently bridged pentacene dimers to reveal
how the molecular structure of the “bridge” affects
the magnitude of through-space Coulombic and through-bond exchange
interactions in the system. Our results show that through-bond interactions
are significant in dimers with conjugated molecules as bridging units
and these interactions promote the overall electronic coupling in
the system. Our generalized approach paves the way for the application
of MCD in investigating interchromophoric interactions across a range
of π-conjugated systems