Poly{tris[4-(2-Thienyl)phenyl]amine} fluorescent conjugated microporous polymer for selectively sensing picric acid

• Published in: Sensors and actuators. B, Chemical Chemical, 2017-06, Vol.244, p.334-343
• Main Authors: Geng, Tongmou, Zhu, Zongming, Wang, Xie, Xia, Hongyu, Wang, Yu, Li, Dengkun
• Format: Article
• Language: English
• Subjects: Carbazoles; Chemical sensors; Chemical synthesis; Chemoreceptors; Chemosensory perception; Conjugated microporous polymers; Conjugation; Detection; Emission analysis; Ferric chloride; Fluorescence; Fluorescent chemosensor; Iron chlorides; Lighting; Nitrophenol; picric acid; Polycarbazole; Polythiophene; Porosity; Porous materials; Sensors
• ISSN: 0925-4005; 1873-3077
• DOI: 10.1016/j.snb.2017.01.005

[Display omitted] •Two thiophene- and carbazole-based conjugated microporous polymers with triphenylamine as cores were via FeCl3 oxidative polymerization.•We first investigated the fluorescent sensing property of conjugated microporous polymer thiophene-containing for aromatics.•The thiophene-based CMP PTPATTh shows higher selectivity than PTPATCz for PA and possesses the similar sensitivity with PTPATCz. Two thiophene-based and carbazole-based conjugated microporous polymers (PTPATTh and PTPATCz) with triphenylamine core structural monomers were synthesized via straight forward anhydrous ferric chloride oxidative coupling polymerization. We first explored the fluorescent sensing performance of thienyl CMPs for picric acid (PA) and investigated comparatively the porosity and fluorescence sensing property for PA/p-nitrophenol (NP). Thanks to the propeller-like structure, high porosity, extended π-conjugation and electron-rich characteristics, the both CMPs exhibited strong fluorescent emission properties and worked as fluorescent chemosensors toward electron-deficient nitroaromatic analytes. The suspension of PTPATTh and PTPATCz given rise to the high luminescence, and showed a white and yellow emission in both THF and DOX excited under 365nm using a UV lamp, respectively. Though BET surface area values and response speed of PTPATTh (594m2g−1) are lower than that of PTPATCz (894m2g−1), PTPATTh display higher selectivity for tracing PA than PTPATCz in DOX and THF. In short, the PTPATTh may be a new kind of material for detecting PA.