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A New Squaraine‐Linked Triazinyl‐Based Covalent Organic Frameworks: Preparation, Characterization and Application for Sensitive and Selective Determination of Fe 3+ Cations
Author(s) -
Xue Rui,
Gou Hao,
Zheng Yanping,
Zhang Li,
Liu Yinsheng,
Rao Honghong,
Zhao Guohu
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202002232
Subject(s) - melamine , squaric acid , fluorescence , covalent bond , chemistry , nitro , quenching (fluorescence) , amine gas treating , triazine , covalent organic framework , photochemistry , nuclear chemistry , inorganic chemistry , polymer chemistry , organic chemistry , alkyl , physics , quantum mechanics
A new triazinyl‐based covalent organic frameworks(COFs) linked by squaraine(ST‐COF‐1) was synthesized via condensation of squaric acid (SA) and 1,3,5‐triazine‐2,4,6‐triamine (Melamine, MA). The BET surface area of ST‐COF‐1 was calculated as 484.12 m 2 g −1 . The suspension of this material will emit strong blue fluorescence under the irradiation of 365 nm ultraviolet lamp. Strong quenching effects of Fe 3+ on the fluorescence of the COFs allowed selective chemosensing for Fe 3+ cation. In addition, some nitro aromatic compounds also cause strong fluorescence quenching, which proves that this material can also be used for the qualitative detection of nitro aromatic compounds.