Morphology controllable conjugated network polymers based on AIE-active building block for TNP detection

作者：Jiang, Shan; Meng, Lingchen; Ma, Wenyue; Qi, Qingkai; Zhang, Wei; Xu, Bin; Liu, Leijing^*; Tian, Wenjing^*

来源：CHINESE CHEMICAL LETTERS, 2021, 32(3): 1037-1040.

DOI：10.1016/j.cclet.2020.09.019

• Conjugated network polymers
• Aggregation-induced emission
• Morphology
• 2,4,6-Trinitrophenol
• Detection

Luminescent conjugated network polymer is one of the most promising chemo-sensors owing to their good chemical/optical stability and multiple functionalization. Herein, three conjugated network polymers were prepared by using aggregation-induced emission active 1,1,2,2-tetrakis(4-formyl-(1,1'-biphenyl))-ethane (TFBE) unit as monomer and hydrazine as linker. Through regulating the synthetical condition, the polymeric network can form either uniform two-dimensional azine-linked nanosheets (A-NS), conjugated microporous polymers (A-CMP) or covalent organic frameworks (A-COF). All of these polymers exhibited good stability and high fluorescence quantum efficiency with the quantum yield of 6.31% for A-NS, 5.26% for A-CMP, and 5.80% for A-COF, as well as fast and selective fluorescence quenching response to 2,4,6-trinitrophenol (TNP). And the best TNP sensing performance with the Stern-Volmer constants (K-sv) values up to 8 x 10(5) L/mol and a detection limit of 0.09 mmol/L was obtained for A-NS. The study explores various strategies to construct conjugated polymers with different nanoarchitectures based on the same building block for sensitive detection of explosives.

• 单位
  吉林大学