A novel microporous phosphazene-triazinyl based covalent organic framework: Preparation, characterization and fluorescence properties

• Published in: Optik (Stuttgart) Vol. 242; p. 167184
• Main Authors: Xue, Rui, Gou, Hao, Zheng, Yan-Ping, Liu, Yin-Sheng, Rao, Hong-Hong, Zhao, Guo-Hu
• Format: Journal Article
• Language: English
• Published: Elsevier GmbH 01.09.2021
• Subjects: COF; Covalent organic framework; Fluorescence; HM-COF; Covalent organic framework; Fluorescence; COF; HM-COF
• ISSN: 0030-4026; 1618-1336
• DOI: 10.1016/j.ijleo.2021.167184

Covalent organic frameworks(COFs) attracted more and more attention due to the unique advantages, such as flexible topological connectivity, regular periodic pore structures, excellent stability and tunable functionality. Recently, several covalent organic frameworks(COFs) were developed for fluorescence detection of metal ions, explosives, VOCs, and so on. In this work, a novel fluorescent COFs(HM-COF) based on phosphazene and triazinyl was prepared by polymerization of hexachlorocyclo-triphosphazene(HCCP) and melamine(MA) successfully. The BET surface area and pore size of HM-COF were calculated as 305.7 m2 g-1 and 12.6 Å, respectively. HM-COF can emit strong fluorescence under ultraviolet lamp. An obvious fluorescent quenching of HM-COF was observed by adding Fe3+ aqueous solution, which demonstrated that HM-COF can act as a good fluorescent sensor for detecting Fe3+ cations. Furthermore, HM-COF can also be used for the qualitative detection of nitro aromatic compounds. •A novel phosphazene-triazinyl based covalent organic framework.•The BET surface area was calculated to be 305.7 m2 g-1.•HM-COF emits strong blue fluorescent under ultraviolet lamp.•Selective chemosensing for Fe3+.•Qualitative detection of nitro aromatic compounds.