Jia-qi Du, Du-wei Lin, Wen-yi Chen, Qian Sun and En-qing Gao
{"title":"A dual-emission fluorescence sensor based on TCPP@UiO-66-NH2 for high-sensitivity detection of copper ions†","authors":"Jia-qi Du, Du-wei Lin, Wen-yi Chen, Qian Sun and En-qing Gao","doi":"10.1039/D4CE01017E","DOIUrl":null,"url":null,"abstract":"<p >Copper ions are a significant concern to people's health and wine quality. By adopting a “one-pot” approach, tetra(4-carboxyphenyl)porphyrin (TCPP) molecules were integrated into UiO-66-NH<small><sub>2</sub></small> metal–organic frameworks, forming TCPP@UiO-66-NH<small><sub>2</sub></small> dual-emission fluorescence sensing platform towards copper ions. The blue fluorescence of UiO-66-NH<small><sub>2</sub></small> at 466 nm was deemed an internal reference signal; thus, the built-in corrections in the complex were effectively achieved. The red emission fluorescence of TCPP at 654 nm was quenched by Cu<small><sup>2+</sup></small>, resulting in a reliable signal and noticeable color changes. A quick and sensitive ratio fluorescence sensor was constructed with the signal contrast mechanism. This sensor enabled trace detection of Cu<small><sup>2+</sup></small> within the concentration range of 0–10 nM, with a detection limit as low as 24 nM, and exhibited good anti-interference capability and cycling stability. Further spiking-recovery experiments demonstrated excellent detection performance and analytical reliability of the sensor in water and red wine samples.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 4","pages":" 488-496"},"PeriodicalIF":2.6000,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"CrystEngComm","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/ce/d4ce01017e","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Copper ions are a significant concern to people's health and wine quality. By adopting a “one-pot” approach, tetra(4-carboxyphenyl)porphyrin (TCPP) molecules were integrated into UiO-66-NH2 metal–organic frameworks, forming TCPP@UiO-66-NH2 dual-emission fluorescence sensing platform towards copper ions. The blue fluorescence of UiO-66-NH2 at 466 nm was deemed an internal reference signal; thus, the built-in corrections in the complex were effectively achieved. The red emission fluorescence of TCPP at 654 nm was quenched by Cu2+, resulting in a reliable signal and noticeable color changes. A quick and sensitive ratio fluorescence sensor was constructed with the signal contrast mechanism. This sensor enabled trace detection of Cu2+ within the concentration range of 0–10 nM, with a detection limit as low as 24 nM, and exhibited good anti-interference capability and cycling stability. Further spiking-recovery experiments demonstrated excellent detection performance and analytical reliability of the sensor in water and red wine samples.