Pressure-induced emission enhancement through a synergistic effect between suppression of excimer formation and activation of aggregation-induced emission.

ABSTRACT: Conventional organic π-systems usually suffer from pressure-induced emission quenching due to enhanced π-π stacking, which leads to the formation of dark-state excimers and impedes their high-pressure applications. Herein, we present a new anthracene derivative, 9-(2,2-di([1,1'-biphenyl]-4-yl)vinyl)anthracene (QP-AN), which exhibits significant pressure-induced emission enhancement (PIEE) at 2.49 GPa. Single-crystal analysis reveals a unique π-π dimer packing motif characterized by an exceptionally small interplanar distance (D _π-π = 3.280 Å) and a minimal overlap area (S _π-π = 9.57%). Under high pressure, this motif not only suppresses excimer formation by preventing π-plane slippage but also amplifies the aggregation-induced emission (AIE) effect by re

SUBMITTER: Yang X 

PROVIDER: S-EPMC12659118 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature