am8b01624_si_001.pdf (3.48 MB)
AIE-Active Polyamide Containing Diphenylamine-TPE Moiety with Superior Electrofluorochromic Performance
journal contribution
posted on 2018-04-19, 00:00 authored by Ningwei Sun, Kaixin Su, Ziwei Zhou, Ye Yu, Xuzhou Tian, Daming Wang, Xiaogang Zhao, Hongwei Zhou, Chunhai ChenElectrofluorochromism
has attracted great attention due to the intelligence optoelectronic
and sensing applications. The intrinsically switchable fluorophores
with high solid-state fluorescence are regarded as key for ideal electrofluorochromic
materials. Here, we reported an AIE-active polyamide with diphenylamine
and tetraphenylethylene units, showing high fluorescence quantum yield
up to 69.1% for the solid polymer film and stable electrochemical
cycling stability. The polyamide exhibited reversible color and emission
switching even in hundreds of cycles, and the fluorescence on/off
contrast ratio was determined up to 417, which is the highest value
to our knowledge. Furthermore, as the response time is vital for the
real-life applications, to speed up the response of electrofluorochromism,
a porous polymer film was readily prepared through a facile method,
notably exhibiting high fluorescence contrast, long-term stability
and obviously improved response, due to the sharply increased surface
area. Therefore, the AIE-functionalization combining the porous structure
strategy will synergistically and dramatically improve the electrofluorochromic
performance, which will also promote their practical applications
in the near future.