Absorption and emission spectra of C6F5X+ (X = H, F, Cl, Br, and I) radical cation in perfluorohexane matrix

Oomori, Takayuki; Hikida, T.

doi:10.1016/0301-0104(93)85085-m

Cited by 5 publications

(1 citation statement)

References 19 publications

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“…The radicals were prepared not only by photolysis but also as isolated forms of salts before use. The available electron donor skeletons are amines, ,− phenazine analogues, ,− and tetrathiafulvalenes as well as polycyclic aromatic hydrocarbons ,, and halogenated and trimethoxybenzenes. , The electron acceptor skeletons include quinone, ,, chalcone derivatives, benzonitrile, and decacyclene . The luminescence of these radical ions was mainly measured in frozen solution, with the quantum yields generally below 10 –2 .…”

Section: Luminescent Organic Radicalsmentioning

confidence: 99%

Luminescent Radicals

Mizuno,

Matsuoka,

Mibu

et al. 2024

Chem. Rev.

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Organic radicals are attracting increasing interest as a new class of molecular emitters. They demonstrate electronic excitation and relaxation dynamics based on their doublet or higher multiplet spin states, which are different from those based on singlet–triplet manifolds of conventional closed-shell molecules. Recent studies have disclosed luminescence properties and excited state dynamics unique to radicals, such as highly efficient electron–photon conversion in OLEDs, NIR emission, magnetoluminescence, an absence of heavy atom effect, and spin-dependent and spin-selective dynamics. These are difficult or sometimes impossible to achieve with closed-shell luminophores. This review focuses on luminescent organic radicals as an emerging photofunctional molecular system, and introduces the material developments, fundamental properties including luminescence, and photofunctions. Materials covered in this review range from monoradicals, radical oligomers, and radical polymers to metal complexes with radical ligands demonstrating radical-involved emission. In addition to stable radicals, transiently formed radicals generated in situ by external stimuli are introduced. This review shows that luminescent organic radicals have great potential to expand the chemical and spin spaces of luminescent molecular materials and thus broaden their applicability to photofunctional systems.

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