Author/Authors :
Hirano، نويسنده , , Tomoya and Osaki، نويسنده , , Takashi and Fujii، نويسنده , , Shinya and Komatsu، نويسنده , , Daisuke and Azumaya، نويسنده , , Isao and Tanatani، نويسنده , , Aya and Kagechika، نويسنده , , Hiroyuki، نويسنده ,
Abstract :
The conformational change of amide structure of benzanilide or urea structure of N,N′-diphenylurea induced by methylation of the secondary nitrogen was visualized by introduction of pyrene moieties on the benzene ring. In contrast to the extended trans-form of secondary amide and urea, which showed monomer fluorescence emission of pyrene, the corresponding N-methylated compounds exist in cis-form, which exhibited excimer emission.
Keywords :
Aromatic urea , Aromatic amide , fluorescence , Conformation
