A new monomer derived form carbazolyl triphenylethylene was synthesized through Wittig-Horner and Suzuki reactions with excellent yields

and its polymer was obtained by radical polymerization initiated with AIBN.Their thermal and photophysical properties were characterized by differential scanning calorimetry (DSC)

thermal gravimetric analysis (TGA)

ultra-violet (UV) spectra and photoluminescence (PL) spectra.The preliminary results show that:the monomer and polymer possess high glass transition temperatures (210℃ and 229℃

respectively) and high thermal decomposition temperatures (466℃ and 467℃

respectively);in dichloromethane solution

the emission peak of the monomer locates on 455 nm

while the peak of the polymer red shifts to 466 nm;the polymer exhibits higher quantum yield (0.16) in dichloromethane solution than that of the monomer (0.017);both the monomer and polymer emit very intense blue emission in solid form

while the monomer has the maximum emission wavelength at 472 nm and the polymer at 482 nm;the monomer exhibits obvious aggregation-induced emission (AIE) while adding water into it’s THF solution and on/off fluorescent switching which senses to organic vapor

and the polymer has aggregation-induced enhanced emission (AIEE) characteristics.The twist structures of the monomer are considered as the key structure for the AIE and AIEE phenomena of those carbazolyl triphenylethylene derivatives.It is suggested that they are potential materials for fabrication in OLED devices and fluorescence sensors.