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A novel fluorescent covalent organic framework containing boric acid groups for selective capture and sensing of cis-diol molecules.
Chang, Zhaosen; Liang, Ying; Wang, Shunli; Qiu, Lu; Lu, Yan; Feng, Lijuan; Sui, Zhuyin; Chen, Qi.
Afiliação
  • Chang Z; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China. chenqi@hainanu.edu.cn.
Nanoscale ; 12(46): 23748-23755, 2020 Dec 08.
Article em En | MEDLINE | ID: mdl-33231248
Owing to specific formation of five-membered or six-membered cyclic esters between boric acid groups and cis-diol molecules, boric acid bearing fluorescent materials can not only selectively capture but also specifically identify cis-diol substances. In this work, a novel covalent organic framework containing boric acid groups (COF-BA) was prepared through post-modification via the aza-Diels-Alder cycloaddition reaction. COF-BA with good stability, a permanent pore structure, a high specific surface area (606 m2 g-1) and a uniform pore size (2.59 nm) exhibited unique selectivity toward the cis-diol guest molecule 1,2-dihydroxyanthracene-9,10-dione (1,2-Doa) with a high adsorption capacity of 177.95 mg g-1. However, as for the isomers of 1,2-Doa (1,4-dihydroxyanthracene-9,10-dione and 2,6-dihydroxyanthracene-9,10-dione), the corresponding uptake capacities are distinctively decreased to 40.86 mg g-1 and 3.05 mg g-1, respectively. It is worth noting that the COF-BA can be recovered and recycled. Moreover, because the formation of the quinoline enhanced the conjugation effect of the COF skeleton, it was unexpectedly found that COF-BA possessed an intrinsic fluorescence property and could be used as an optical sensor for 1,2-Doa.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Nanoscale Ano de publicação: 2020 Tipo de documento: Article País de afiliação: China País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Nanoscale Ano de publicação: 2020 Tipo de documento: Article País de afiliação: China País de publicação: Reino Unido