Singlet Fission in Push-Pull Para-Azaquinodimethane Films under the Gaze of Time Resolved Optical and Magnetic Spectroscopy.

ABSTRACT: In this study, a totally green synthetic protocol was employed to obtain four new donor-acceptor-donor para-azaquinodimethane (pAQM) derivatives to uncover the effect of tuning the push-pull character on their photobehaviour in solution as well as in thin film and in particular on their capability of undergoing singlet fission (SF). The bisthiophene and substituted benzene were used as electron-donor groups at opposite sides of the pAQM electron-acceptor core in asymmetric structures (AsOMe and AsNMe₂), whereas different 5-phenyl thiophene moieties were symmetrically linked to the pAQM core in TPh and TPhOMe. The photoinduced excited state dynamics was investigated in a synergic effort by employing both time resolved optical and electron paramagnetic resonance (EPR) spectroscopi

SUBMITTER: Alebardi M 

PROVIDER: S-EPMC12865250 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature