Non-Traditional Luminescent Polyurethanes of <i>n</i>-π Electron Hybrid Structures with Varying Separation of Aromatic Rings.

ABSTRACT: Detailed structure-activity relationships and molecular design criteria for nonconventional and nonconjugated luminescent polymers are still ambiguous. This work reports n-π electron hybrid polyurethane derivatives (PUs) with varying separation of benzene rings in the backbone. Experimental and computational results show that although through-bond conjugation is not the main source of luminescence, the separated benzene rings still modulate the photophysical properties by affecting the molecular conformation and electron transport. Meanwhile, hydrogen bonds and p-π* interactions exert a significant influence on the emission wavelengths by regulating the aggregated-state structures. In PU1, the excited state is predominantly charge transfer. With an increase in t

SUBMITTER: Wang Z 

PROVIDER: S-EPMC12481474 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature