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Photoluminescence of strongly correlated organic radical 1,3,5-trithia-2,4,6-triazapentalenyl (TTTA) crystals was measured at room temperature in order to elucidate the relaxation process in the excited state, which is responsible for an initiation of the photoinduced magnetic phase transition in this material. The electronic structure and luminescence properties of TTTA molecule were also investigated...
Photoinduced magnetic phase transition in an organic radical 1,3,5-trithia–2,4,6-triazapentalenyl (TTTA) crystal has been studied by microscopic IR measurements. Both photoexcitations of the charge-transfer and intramolecular π–π transition bands induce a low-temperature diamagnetic to high-temperature paramagnetic phase transition but with different threshold photon densities. The behavior of the...
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