Photoinduced charge-transfer dynamics in fluorescent electron donor-acceptor polymers.

ABSTRACT: Electron donor-acceptor (D-A) polymers are emerging as promising candidates for the development of solid materials with tunable emission. Herein, we investigate the excited-state dynamics of polymers consisting of a central naphthalenediimide (NDI) acceptor with two polystyrene donor chains and copolymers with various secondary donors incorporated. We find strong differences in the dynamics when going from diluted polymer solutions to pure polymer films. In liquids, ultrafast intrachain electron transfer from a styrenic donor to the excited NDI, followed by sub-nanosecond charge recombination to the ground state is observed. Because of the tight packing in the film, ultrafast electron transfer occurs between donors and acceptors of different polymer chains. Emission is found to originate f

SUBMITTER: Sucre-Rosales E 

PROVIDER: S-EPMC12671088 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature