Tetraphenylethylene photoisomerization

Photoisomerization of tetraphenylethylene was investigated by the time-resolved TG signal in the picosecond to nanosecond scale [101-103] (Scheme 8). 

A map of the singlet-singlet excitation and photoisomerization potential energy surface for tetraphenylethylene in alkane solvents were prepared using fluorescence and picosecond optical calorimetry (Figure 3.4) [4]. The line shapes of the vertical and relaxed exdted-state emissions at 294 K in methylcyclohexane were obtained from the steady-state emission spectrum, the wavelength dependence of the time-resolved fluorescence decays, and the temperature dependence of the vertical and relaxed state emission quantum yields and of the time-resolved fluorescence decays. 

Figure 3.4 A map of the photoisomerization potential energy surface for tetraphenylethylene in alkane solvents [4]. (Reproduced with permission.)...

---