ArticleChemical science2025
Critical molecular design that can actively control intramolecular singlet fission by hydrostatic pressure.
Article in Chemical science, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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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 transient absorption measurements revealed the active inversion of SF process (acceleration
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