Hu Chen, Gao Ying-Chun, Zhang Can, Liu Min, Geng Tong-Mou
AnHui Province Key Laboratory of Optoelectronic and Magnetism Functional Materials, School of Chemistry and Chemical Engineering, Anqing Normal University Anqing 246011 China
RSC Adv. 2020 Jan 31;10(9):5108-5115. doi: 10.1039/c9ra10384h. eCollection 2020 Jan 29.
In this study, two fluorescence conjugated microporous polymers based on perylene tetraanhydride bisimide (DPA and DPA) were prepared Sonogashira-Hagihara cross-coupling polymerization for the efficient detection of -nitrophenol (-NP). They were well characterized FT-IR, solid state C NMR, elemental analysis, and other material characterization techniques. The experiments proved that both CMPs possess high thermal and chemical stability and a porous nature with Brunauer-Emmett-Teller (BET) specific surface areas of 41.3 and 402.1 m g. Importantly, owing to signal amplification by the conjugated skeleton, DPA and DPA exhibit extremely high sensitivity to -NP with values of 1.83 × 10 and 1.69 × 10 L mol and limits of detection of 5.73 × 10 and 7.36 × 10 mol L, respectively. The sensing performance of DPA and DPA was dependent on the position of crosslinking points and crosslinking density. Finally, super amplified quenching was considered the electron transfer mechanism and hydrogen bond interactions were also present.
在本研究中，制备了两种基于苝四酐双酰亚胺的荧光共轭微孔聚合物（DPA和DPA），通过Sonogashira-Hagihara交叉偶联聚合反应实现对对硝基苯酚（-NP）的高效检测。采用傅里叶变换红外光谱（FT-IR）、固态碳核磁共振（¹³C NMR）、元素分析及其他材料表征技术对其进行了充分表征。实验证明，两种共轭微孔聚合物（CMPs）均具有高热稳定性和化学稳定性，且具有多孔性质，其 Brunauer-Emmett-Teller（BET）比表面积分别为41.3和402.1 m²/g。重要的是，由于共轭骨架的信号放大作用，DPA和DPA对对硝基苯酚表现出极高的灵敏度，其Ksv值分别为1.83×10⁴和1.69×10⁴ L/mol，检测限分别为5.73×10⁻⁸和7.36×10⁻⁸ mol/L。DPA和DPA的传感性能取决于交联点的位置和交联密度。最后，超放大猝灭被认为是电子转移机制，且氢键相互作用也存在。
