Fluorescent conjugated microporous polymer based on perylene tetraanhydride bisimide for sensing o-nitrophenol

The effects of the crosslinking position and degree of conjugation in perylene tetraanhydride bisimide microporous polymers on fluorescence sensing performance

“…DP 4 A 0 and DP 4 A 2 as well as their corresponding building blocks were prepared by following approaches found in previous reports. 14,24,25 The structures of DP 4 A 0 and DP 4 A 2 were conrmed via FT-IR spectroscopy, ss 13 C NMR spectroscopy, elemental analysis (EA), and UV-Vis absorption spectroscopy. The FT-IR spectra of both DP 4 A 0 and DP 4 A 2 (Fig.…”

“…1) showed peaks at 2189 and 2200 cm À1 , which are the characteristic of bis-substituted acetylenes. 14,26 The polyimide rings were conrmed by the characteristic peaks of the carbonyl groups in six-membered polyimide rings ($1670 cm À1 and $1710 cm À1 ). 14,[27][28][29][30] The bands at 1331 and 1335 cm À1 are attributed to C-N stretching vibration peaks.…”

“…By covalently incorporating dye-based monomers into conjugated microporous polymers (CMPs), uorophores can be separated spatially through porosity, thereby remarkably increasing the uorescent intensity of the monomers, which are initially affected by ACQ. 13,14 CMPs are worth the consideration for a variety of reasons: rst, compared with similar building blocks, CMPs become prominent electron donors due to the expansion of p-conjugation. Furthermore, in virtue of the p* delocalization, the enhanced donating ability of CMPs in the excited state provides a platform for the facile migration of excitation.…”

Fluorescent chemosensor based on organic nanofibril thin-films

“…通常, 溶液环境中的PTCDIs的分子荧光会在形成 聚集体后自猝灭, 而且刚性结构导致其溶解度普遍较 差, 即使在溶液中, 浓度增大也很容易形成聚集体 [6] . [7,8] 、生 物小分子 [9,10] 、无机非金属离子(F − 等) [11] 、细胞内 pH [12] 、硝基芳香化合物 [13,14] 、有机胺 [15] [18,19] 、溶剂气氛扩散自组装 [4] 、pH引发水相凝胶化 等 [20] . 利用这些一维纳米纤维材料, 一方面通过探究 一维电荷传输特性和界面电荷分离机制, 并根据光电 流/电阻信号变化, 构建了薄膜化学电阻传感器, 实现…”

Photophysical Properties of Phthalimide and Pyromellitic Diimide Tethered Imidazolium Nitrophenolate Salts

“…In general, nitro‐phenolic compounds are pollutant and high energy materials . There are good numbers of reports on their detection in solution or as vapor . Majority of studies are based on the emission quenching and relative sensitivity of the quenching.…”