1,4-Dihydropyrrolo[3,2-<i>b</i>]pyrrole modified with dibenzoxazepine: a highly efficient core for charge-transfer-based OLED emitters.

ABSTRACT: The present work is focused on designing novel heteroaromatic systems, formally a hybrid of dibenzo[b,f]oxazepines and 1,4-dihydropyrrolo[3,2-b]pyrroles (DHPPs). Straightforward synthesis affords a family of rigid, centrosymmetric, π-expanded aromatic heterocycles amenable to facile post-functionalization. The rigidified molecular architecture is responsible for several key photophysical features including (1) the excellent blue colour purity (full width at half maximum parameter = 0.435 eV) and (2) stronger emission compared to analogous DHPPs capable of free rotation. Comparison of dyes possessing nitro groups at various positions reveals that if NO₂ groups are located at distant positions the quadrupolar dye shows strong yellow fluorescence in non-polar s

SUBMITTER: Gorski K 

PROVIDER: S-EPMC11843259 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature