Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China.
Anal Methods. 2022 Jun 23;14(24):2389-2395. doi: 10.1039/d2ay00626j.
A new fully conjugated covalent organic framework material (COF) has been synthesized the Knoevenagel condensation reaction using 1,3,6,8-tetra(4-formylphenyl)pyrene (TFPPy) as the chromogenic unit and 2,2'-([2,2'-bithiophene]-5,5'-diyl)diacetonitrile (ThDAN) as the linker. The COF has been successfully prepared under the optimized conditions and showed excellent crystallinity and chemical stability. Especially, it was able to maintain its crystallinity even when immersed under harsh conditions such as HCl (3 M) and NaOH (3 M). Meanwhile, COF exhibited good fluorescence properties, which could remain relatively stable under different pH conditions. Moreover, COF was further employed for the detection of Fe with high sensitivity and selectivity with a limit of detection (LOD) of 1.26 μM. COF with high stability and fluorescence is a promising material for chemical sensing.
一种新型的全共轭共价有机骨架材料（COF）已通过 Knoevenagel 缩合反应合成，使用 1,3,6,8-四（4-醛基苯基）芘（TFPPy）作为显色单元和 2,2'-([2,2'-联噻吩]-5,5'-二基)二乙腈（ThDAN）作为连接体。该 COF 在优化条件下成功制备，表现出优异的结晶度和化学稳定性。特别是，即使在 HCl（3 M）和 NaOH（3 M）等恶劣条件下浸泡，它仍能保持其结晶度。同时，COF 表现出良好的荧光性质，在不同 pH 值条件下仍能保持相对稳定。此外，COF 进一步用于 Fe 的高灵敏度和选择性检测，检测限（LOD）为 1.26 μM。具有高稳定性和荧光的 COF 是一种有前途的化学传感材料。
