Charge-transfer mediated J-aggregation in red emitting ultra-small-single-benzenic meta-fluorophore crystals.

ABSTRACT: Red emission in crystals has been observed with an ultra-small-single-benzenic meta-fluorophore (MF) with a molecular weight (MW) of only 197 Da, bettering the literature report of fluorophores with the lowest MW = 252 Da. Supramolecular extensive hydrogen-bonding and J-aggregate type centrosymmetric discrete-dimers or a 1D chain of MFs led to red emission (λ ^max _em = 610-636 nm) in MF crystals. Unlike in the solution phase showing one absorption band, in thin films and in crystals the transition from the S₀ state to both the S₁ ^- state and S₁ ⁺ state becomes feasible. The angle between the transition dipole moments has been obtained to be 66.99° and the exciton splitting energy

SUBMITTER: Mandal M 

PROVIDER: S-EPMC11626463 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature