Photoluminescence and electroluminescence of pyrazoline monomers and dimers

The synthesis and characterisation of novel pyrazoline derivatives containing triphenylamine

“…8 and 9). These relatively shifts in the spectra suggest that there is no big change in the molecular configuration of these compounds when they are dissolved in solution or in solid film [10].…”

“…The PL quantum yields of the other compounds are in the range of 0.37e0.93. This difference of quantum yields might be due to the change of the molecular size and the change of the electronic pushepull substitution of the conjugated part in the molecules [10].…”

Electroluminescent properties of poly[N,N′-bis(4-butylphenyl)-N,N′-bis(phenyl)benzidine] doped with 1,3,5-Tris(1-phenyl-1H-benzimidazol-2-yl)benzene

“…However, the Abs spectrum of the poly-TPD:TPBi (1:1) blend thin film shows two absorption peaks at 312 nm and 374 nm. The absorption peaks of the composite film exhibit a red shift compared to that of TPBi film and poly-TPD film, which is attributed to the change of solid state environment due to the mixing of two types of molecules [19]. Nonetheless, the Abs spectrum of the composite film is still similar to the superposition of the poly-TPD and TPBi electronic signatures from the absorption spectra of TPBi film and poly-TPD film, indicating that no new complex is formed in the mixture of poly-TPD and TPBi molecules.…”

Synthesis and anti-bacterial activity of novel 1,3-pheylene-bis-N-acetyl- and N-phenylpyrazole derivatives

“…(2E,2'E) -3,3'-(1,3-phenylene) [23][24][25][26][27] Bis-chalcone (1a-h) (1 mmol) and hydrazine hydrate (4 mmol) in acetic acid and/or phenylhydrazine (4 mmol) in acetic acid/ethanol mixture were refluxed for 4 and 8 hours, respectively. The reaction mixture was poured into ice-bath, at the end of the reaction and was checked with pH paper to ensure neutralization of the medium by addition of ammonia.…”