Effects of torsional disorder and position isomerism on two-photon absorption properties of polar chromophore dimers

- The effects of torsional disorder and position isomerism on two-photon absorption.
- The inter- and intra-branch torsional disorder could possibly result in the observed two-photon absorption additive behavior.
- The cooperative enhancement can be achieved when the subunits are substituted in closer proximity and have larger interchromophore angle.