Critical molecular design that can actively control intramolecular singlet fission by hydrostatic pressure.

ABSTRACT: The active control of singlet fission (SF) by external stimuli presents a major challenge in current chemistry, although it is yet in the initial stages. In this study, we synthesized a series of SF-active chromophore pentacene dimers connected by the flexible linkers and investigated the ground- and excited-state properties, under hydrostatic pressure as an external stimulus. The flexibilities of the linkers were elucidated by the density functional theory. Hydrostatic pressure-UV/vis and hydrostatic pressure-circular dichroism spectroscopies showed the absence of a ground-state conformational change, indicating that the active switching of SF observed in this study comes from the excited-state dynamics. The hydrostatic pressure-fluorescence lifetime and hydrostatic pressure-nanosecond tr

SUBMITTER: Ogawa R 

PROVIDER: S-EPMC12541809 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature