Structure-properties relationship of tetrafluorostyrene-based monomers and polymers containing different donor moieties

(Tetrafluorovinylphenyl)carbazole as a Multifunctional Material for OLED Applications

“…48 Apparently, due to the nonemissive energy loss, the intensities of both delayed fluorescence (TADF) and phosphorescence of Cz4FS:m-MTDATA decrease with increased temperature. Using poly(9-(2,3,5,6-tetrafluoro-4-vinylphenyl)-9H-carbazole) (P1) 35 and the copolymer of 9-(2,3,5,6-tetrafluoro-4vinyl phenyl)-9H-carbazole and 9-(4-vinyl phenyl)carbazole (LRC-13), the polymer OLEDs were fabricated and studied. This idea was based on the promising thermal properties of these polymer materials, in particular, high glass transition temperature T g = 215 °C and high decomposition temperature T d = 411 °C for P1.…”

“…This idea was based on the promising thermal properties of these polymer materials, in particular, high glass transition temperature T g = 215 °C and high decomposition temperature T d = 411 °C for P1. 35 They ensure the stability of the devices at high temperatures induced by high current densities.…”

“…This finding is in agreement with the very small photoluminescence quantum yield of the solution of Cz4FS (9% for the solution in toluene). 35 However, in the solid film mutual rotation of D and A fragments is suppressed, and this results in a considerably higher photoluminescence quantum yield of 20%. 35 As it follows from our computations, the structural changes upon excitation into the S 1 state do not change the orbital assignment of the S 1 excited state, and it corresponds to the HOMO−LUMO one-electron excitation.…”

“…35 However, in the solid film mutual rotation of D and A fragments is suppressed, and this results in a considerably higher photoluminescence quantum yield of 20%. 35 As it follows from our computations, the structural changes upon excitation into the S 1 state do not change the orbital assignment of the S 1 excited state, and it corresponds to the HOMO−LUMO one-electron excitation. The computed energies of the HOMO and LUMO orbitals are in agreement with the experimental data (Table 4).…”

Nucleophilic Aromatic Substitution of Polyfluoroarene to Access Highly Functionalized 10-Phenylphenothiazine Derivatives

“…Transition-metal-free methods for the synthesis of PTH derivatives include oxidative C-H amination in the presence of oxidants [ 53 , 54 , 55 , 56 , 57 ] or under electrolytic conditions [ 58 , 59 ], although starting materials are limited to phenols and anilines ( Scheme 1 b). In addition, S N Ar of triphenylsulfonium salts, nitroarenes, and fluoroarenes with phenothiazine have been demonstrated for the preparation of PTH derivatives ( Scheme 1 c) [ 28 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 ].…”