Journal of Photochemistry and Photobiology A: Chemistry p. 67 - 74 (2019)
Update date:2022-08-28
Topics:
Xu, Chendong
Dong, Yujie
Li, Weijun
Zhao, Ruiyang
Dai, Yuyu
Zhang, Cheng
Song, Qingbao
Cyanostilbene has been widely used in the design of photoelectrical materials, and our previous work has confirmed its Z/E isomerization reaction under photoirradiation can be suppressed by forming a suitable donor-acceptor (D-A) structure. In this work, we report two D-A cyanostilbene derivatives with AIE activity, abbreviated as PZPNC and PZNC, whose chemical structures only differ by one more phenyl between donor and acceptor. Their Z/E isomers were characterized with single crystal structures and the impact of D-A distance on their stability of Z/E configuration was studied. The in-situ UV–vis spectra and HPLC results of Z/E-PZPNC and Z/E-PZNC under photoirradiation demonstrated that the Z/E isomerization reaction of PZNC was slower than PZPNC, indicating that the shorter D-A distance is conductive to the stability of cyanostilbene due to the relatively stronger charge transfer state with lower energy.
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