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Non-planar polyimides with monomer containing four triphenylamines for near-infrared electrochromism and TNP detection
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2023-07-07 , DOI: 10.1002/app.54377 Yufan Ma 1 , Shixuan Xia 1 , Minghao Zhai 1 , Ce Zhang 1 , Tianjiao Hong 1 , Baixin Zhang 1 , Wan‐an Cai 1 , Haijun Niu 1 , Wen Wang 2
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2023-07-07 , DOI: 10.1002/app.54377 Yufan Ma 1 , Shixuan Xia 1 , Minghao Zhai 1 , Ce Zhang 1 , Tianjiao Hong 1 , Baixin Zhang 1 , Wan‐an Cai 1 , Haijun Niu 1 , Wen Wang 2
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By using triphenylamine (TPA) with a propeller structure connected to the planar fluorene unit as monomer, three novel polyimide (PI)s were prepared through chemical imidization of N,N′-(9,9-bis(4-(diphenylamino) phenyl)-9H-fluorene-2,7-diyl)-bis(N-(4-methoxyphenyl) benzene-1,4-diamine) (TPAF-NH2) with three kinds of dianhydrides. The three dimensional configurations are designed to decrease molecular stacking rising from strong imide bond, and for faster ion transport in cavity of PIs. All the three PIs have good performance of electrochromic(EC) and sensor. With the voltage increasing from 0 to 1.2 V, the color of P2 film changes from original yellow to red to blue with the response time of only 2.3 s (colored time [tc]) and 2.8 s (bleached time [tb]). The coloring efficiency (CE) of P2 reaches 310 cm2 C−1, with optical contrast (ΔT) of 54%. Especially, the electroactivity of P3 does not decrease significantly after 6000 s cycle. Additionally, there are dual-band in near-infrared (NIR) area after the PI being oxidized. P1 with photoluminescence (PL) quantum efficiency (φPL) of 48% can detect trinitrophenol (TNP) effectively. The novel PIs have promising prospect in NIR EC and TNP detection devices.
中文翻译：
用于近红外电致变色和 TNP 检测的单体含有四个三苯胺的非平面聚酰亚胺
以平面芴单元连接的螺旋桨结构三苯胺（TPA）为单体，通过N , N '-(9,9-双(4-(二苯氨基))苯基的化学酰亚胺化制备了三种新型聚酰亚胺(PI) )-9H-芴-2,7-二基)-双( N- (4-甲氧基苯基)苯-1,4-二胺)(TPAF-NH 2 )与三种二酐。三维结构旨在减少由强酰亚胺键产生的分子堆积，并加快 PI 腔内的离子传输速度。三种PI均具有良好的电致变色（EC）和传感器性能。随着电压从0增加到1.2 V，P2薄膜的颜色由原来的黄色变为红色再变为蓝色，响应时间仅为2.3 s（着色时间[t c]）和 2.8 s（漂白时间 [ t b ]）。P2的着色效率(CE)达到310cm 2 C -1，光学对比度(ΔT )为54％。特别是，P3的电活性在循环6000 s后没有明显下降。此外，PI被氧化后，在近红外(NIR)区域出现双波段。P1的光致发光（PL）量子效率（φ PL）为48%，可以有效检测三硝基苯酚（TNP）。新型PI在NIR EC和TNP检测装置中具有广阔的前景。
更新日期：2023-07-07
中文翻译：
用于近红外电致变色和 TNP 检测的单体含有四个三苯胺的非平面聚酰亚胺
以平面芴单元连接的螺旋桨结构三苯胺（TPA）为单体，通过N , N '-(9,9-双(4-(二苯氨基))苯基的化学酰亚胺化制备了三种新型聚酰亚胺(PI) )-9H-芴-2,7-二基)-双( N- (4-甲氧基苯基)苯-1,4-二胺)(TPAF-NH 2 )与三种二酐。三维结构旨在减少由强酰亚胺键产生的分子堆积，并加快 PI 腔内的离子传输速度。三种PI均具有良好的电致变色（EC）和传感器性能。随着电压从0增加到1.2 V，P2薄膜的颜色由原来的黄色变为红色再变为蓝色，响应时间仅为2.3 s（着色时间[t c]）和 2.8 s（漂白时间 [ t b ]）。P2的着色效率(CE)达到310cm 2 C -1，光学对比度(ΔT )为54％。特别是，P3的电活性在循环6000 s后没有明显下降。此外，PI被氧化后，在近红外(NIR)区域出现双波段。P1的光致发光（PL）量子效率（φ PL）为48%，可以有效检测三硝基苯酚（TNP）。新型PI在NIR EC和TNP检测装置中具有广阔的前景。
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