An oxacalix[4]arene-derived dual-sensing fluorescent probe for the relay recognition of Hg2+ and S2− ions,New Journal of Chemistry

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An oxacalix[4]arene-derived dual-sensing fluorescent probe for the relay recognition of Hg2+ and S2− ions
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2021-08-20 , DOI: 10.1039/d1nj03953a
Manoj Vora ₁ , Shuvankar Dey ₁ , Anita Kongor ₁ , Manthan Panchal ₁ , Falak Panjwani ₁ , Ashukumar Verma ₁ , Vinod Jain ₁

Affiliation

A novel rhodamine–tren-appended oxacalix[4]arene architecture, viz. RTOC, has been introduced as a dual-readout sensor for the selective recognition of mercury (Hg²⁺) and sulphide (S²⁻) ions. The designed probe showed a significant change in colour from yellow to pink and a corresponding ‘turn-on’ fluorescence response was observed upon interaction with Hg²⁺ ions, whereas the lower limit of detection was determined to be 20.5 nM. A theoretical study further discloses that the enhancement of the fluorescence intensity may be due to the Hg²⁺-induced spirolactam ring opening at rhodamine B sites. Moreover, the RTOC–Hg²⁺ system has been successfully utilized for the sensing of sulphide (S²⁻) anions up to submicromolar range.

中文翻译：

一种用于Hg2+和S2−离子中继识别的oxacalix[4]芳烃衍生的双传感荧光探针

一种新型的罗丹明 - tren 附加的 oxacalix[4] 芳烃结构，即。RTOC 已被用作双读出传感器，用于选择性识别汞 (Hg ²⁺ ) 和硫化物 (S ^2- ) 离子。设计的探针显示出从黄色到粉红色的显着颜色变化，并且在与 Hg ²⁺离子相互作用时观察到相应的“开启”荧光响应，而检测下限确定为 20.5 nM。一项理论研究进一步揭示，荧光强度的增强可能是由于 Hg ²⁺诱导罗丹明 B 位点的螺内酰胺开环。此外，RTOC-Hg ²⁺系统已成功用于检测亚微摩尔范围内的硫化物 (S ^2- ) 阴离子。

更新日期：2021-09-08

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