Author/Authors :
Kimura، نويسنده , , Y. and Katano، نويسنده , , Y. and Tanaka، نويسنده , , S. and Yoshinari، نويسنده , , T. and Itoh، نويسنده , , H. and Kuriyama، نويسنده , , Y. and Nagasaka، نويسنده , , S.، نويسنده ,
Abstract :
Thermal cis–trans conversion has been examined in oligothiophene single molecules encapsulated in the molecular vessels of cyclodextrin and Na-mordenite. At high temperatures, optical absorption intensities are enhanced in bithiophene, terthiophene and quinquethiophene, while the intensity of quarterthiophene is temperature independent. Optical absorption comes from uncompensated transition dipole moment due to the thermal torsion between cis and trans forms.
Keywords :
Thiophene oligomers , Cis–trans conversion , Torsion potential energy , optical absorption spectra
