Synthesis,characterization, and hydrazine sensing property of two covalent organic frameworks |
| |
| Authors: | Leijing Liu Canran Wang Jiangpeng Wang Shan Jiang Wenyue Ma Yongcun Zou Wenjing Tian |
| |
| Institution: | 1. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, China;2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, China |
| |
| Abstract: | Sensitive and efficient detection of hydrazine is of great significance because hydrazine is a highly toxic organic molecule, which can pose great threats to human health. Herein, two covalent organic frameworks (COFs) modified with ester groups in the pores, TAPB-DHE and TAPT-DHE, have been successfully synthesized via esterification reaction. Both of the two COFs have good crystallinity, thermal stability, and fluorescence properties. TAPB-DHE can be used as a turn-on fluorescence sensor for the sensitive detection of trace hydrazine in aqueous solution with a detection limit of 0.40 μM and a wide linear range of 0–100 μM due to the fluorescence enhancement of TAPB-DHE caused by the chemical reaction between hydrazine and TAPB-DHE, in which the ester group of the COF is converted into hydroxyl group, leading to the restriction of the intramolecular charge transfer (ICT) effect. This work provides a reference for the design of COFs with hydrazine recognition function and a helpful expansion for the practical application of COFs. |
| |
| Keywords: | covalent organic frameworks fluorescent sensors hydrazine detection intramolecular charge transfer turn-on |
|
|
