In 2022,Skaisgiris, Rokas; Serevicius, Tomas; Dodonova, Jelena; Banevicius, Dovydas; Kazlauskas, Karolis; Tumkevicius, Sigitas; Jursenas, Saulius published an article in Journal of Luminescence. The title of the article was 《Tuning of HOMO-LUMO localization for achieving thermally activated delayed fluorescence》.Safety of 4,6-Dichloropyrimidine The author mentioned the following in the article:
High emission yield and rapid reverse intersystem crossing are essential for efficient thermally activated delayed fluorescence (TADF) compounds In this paper, we show that efficient TADF can be achieved by enhancing the localization of HOMO and LUMO in carbazole-pyrimidine compounds with rather flat mol. structure. Simple carbazole-pyrimidine Cbz-PYR was selected as a reference compound due to the pronounced room-temperature phosphorescence activity. The subsequent modifications of carbazole and pyrimidine units with diphenylamine and Ph fragments resulted in weakened HOMO-LUMO communication, leading to the minimized singlet-triplet energy gap of only 111 meV. Due to the rather flat mol. geometry, TADF compounds showed remarkable radiative decay rate reaching 4.6 x 107 s-1 for the most efficient TADF-active carbazole-pyrimidine compound dCbz-pPYR, followed by high emission yield of 0.75. Efficient green electroluminescence with peak EQE of 18.3%. was shown for OLED device with dCbz-pPYR emitter. The experimental part of the paper was very detailed, including the reaction process of 4,6-Dichloropyrimidine(cas: 1193-21-1Safety of 4,6-Dichloropyrimidine)
4,6-Dichloropyrimidine(cas: 1193-21-1) is a member of organic chlorides. Almost all organochlorine compounds are synthesized. It is widely used as intermediates, solvents and pesticides of chemical synthetic products.Safety of 4,6-Dichloropyrimidine
Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia