Narrowing emission spectra based on indolocarbazole molecular model system: an experimental and theoretical study.

ABSTRACT: To clarify the structure-property relationship of the narrowed emission spectrum, four indolocarbazole (IDCz) model compounds were designed and synthesized. Their π-conjugated plane size can be adjusted by gradually chemically locking the benzene ring. With increasing π-conjugated plane, both 0-1 and 0-2 vibronic peaks are suppressed significantly, demonstrating a gradual narrowing of the emission spectrum. Theoretical calculations reveal that the vibronic coupling gradually weakens with the increase in π-conjugated plane, arising from the significant reduction in the number of involved vibration modes in both high-frequency and low-frequency regions. Additionally, the n → π* transition reduces the charge variation on the benzene rings, which is then diluted as the number of locked benzene

SUBMITTER: Lv Y 

PROVIDER: S-EPMC12572963 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature