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Luminescent covalent organic framework as a recyclable turn-off fluorescent sensor for cations and anions in aqueous solution
| Content Provider | Semantic Scholar |
|---|---|
| Author | Li, Meng-Chao Cui, Zhonghua Pang, Shirui Meng, Lingkun Ma, Dingxuan Shi, Zhan Feng, Shouhua |
| Copyright Year | 2019 |
| Abstract | Covalent organic frameworks (COFs) have shown great potential for use in ion sensing; however, applications of existing COFs are limited to sensing either cations or anions. In this study, a three-dimensional COF, COF-TT, is constructed by reacting the bis(tetraoxacalix[2]arene[2]triazine) core with tetra(p-aminophenyl)methane to provide a luminescent sensor. COF-TT exhibits ultrahigh thermal stability and exceptional chemical stability in aqueous solutions over a broad pH range from 2 to 14, which signifies immense practical potential for sensing applications. Excellent selectivity and high sensitivity of COF-TT toward Fe3+ cations and CrO42−, Cr2O72−, and MnO4− anions are evident via luminescence quenching. COF-TT also exhibits excellent recyclability in terms of washing and re-exposure cycles. Both experimental data and theoretical calculations are employed to unveil the mechanisms of the quenching effect and sensing properties of COF-TT. |
| Starting Page | 11919 |
| Ending Page | 11925 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/c9tc03265g |
| Volume Number | 7 |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c9/tc/c9tc03265g/c9tc03265g1.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/c9tc03265g |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
