Photostable triphenylmethyl-based diradicals with a degenerate singlet-triplet ground state and strong photoluminescence.

ABSTRACT: We present a new class of luminescent diradicals based on tris(trichlorophenyl)methyl (TTM) cores symmetrically bridged by indolocarbazole donors. These diradicals exhibit pure diradical character y ₀ and unprecedented photoluminescence quantum yields ϕ of up to 18%, addressing key challenges in the development of stable, emissive organic diradicals. Light emitting diradicals represent a formidable challenge for synthetic chemists; for applications as molecular color centers in quantum sensing and as emitters in optoelectronics. Unlike conventional approaches that require the conversion of closed-shell precursors, we directly couple brominated TTM radicals via Buchwald-Hartwig coupling. The magnetic and optical properties of the resulting molecules are compr

SUBMITTER: Arnold ME 

PROVIDER: S-EPMC12257165 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature