Hydrazone connected stable luminescent covalent-organic polymer for ultrafast detection of nitro-explosives

Muhammad Asad; Ya-Jie Wang; Shan Wang; Qing-Guo Dong; Lin-Ke Li; Saadat Majeed; Qian-You Wang; Shuang-Quan Zang

doi:10.1039/d1ra08009a

Hydrazone connected stable luminescent covalent-organic polymer for ultrafast detection of nitro-explosives

RSC Adv. 2021 Dec 9;11(62):39270-39277. doi: 10.1039/d1ra08009a. eCollection 2021 Dec 6.

Authors

Muhammad Asad¹, Ya-Jie Wang¹, Shan Wang¹, Qing-Guo Dong¹, Lin-Ke Li¹, Saadat Majeed², Qian-You Wang¹, Shuang-Quan Zang¹

Affiliations

¹ Henan Key Laboratory of Crystalline Molecular Functional Materials, Henan International Joint Laboratory of Tumor Theranostical Cluster Materials, Green Catalysis Center, College of Chemistry, Zhengzhou University Zhengzhou 450001 P. R. China shanwang@zzu.edu.cn lilinke@zzu.edu.cn.
² Institute of Chemical Sciences, Bahauddin Zakariya University Multan 60800 Pakistan.

Abstract

Developing promising luminescent probes for the selective sensing of nitro-explosives remains a challenging issue. Porous luminescent covalent-organic polymers are one of the excellent sensing probes for trace hazardous materials. Herein, fluorescent monomers 1,1,2,2-tetrakis(4-formyl-(1,1'-biphenyl))ethane (TFBE) and 1,3,5-benzenetricarboxylic acid trihydrazide (BTCH) were selected to build a novel hydrazone connected stable luminescent covalent-organic polymer (H-COP) of high stability by typical Schiff-base reaction. The N₂ sorption study, BET surface area analysis, and TGA profile indicate the porosity and stability of this H-COP material. Such properties of the H-COP material enable a unique sensing platform for nitro-explosives with great sensitivity (Ksv ∼ 10⁶ M) and selectivity up to μM. This polymer material shows attractive selectivity and sensitivity towards phenolic nitro-explosives and other common explosives among earlier reported COP-based sensors.