Colorimetric and fluorescent sensing of a new FRET system via [5]helicene and rhodamine 6G for Hg2+ detection†,New Journal of Chemistry

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Colorimetric and fluorescent sensing of a new FRET system via [5]helicene and rhodamine 6G for Hg2+ detection†
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2018-01-04 00:00:00 , DOI: 10.1039/c7nj04129b
Anuwut Petdum _{1,

2,

3,

4} , Waraporn Panchan _{4,

5,

6} , Jitnapa Sirirak _{1,

2,

3,

4} , Vinich Promarak _{4,

7,

8} , Thanasat Sooksimuang _{4,

5,

6} , Nantanit Wanichacheva _{1,

2,

3,

4}

Affiliation

A “visually colorimetric” and fluorometric sensor based on [5]helicene connected to rhodamine 6G via a hydrazide moiety, RG5H, was designed and prepared for the highly sensitive and selective detection of Hg²⁺. The sensor system operated through the FRET process from the [5]helicene energy donor to the ring-opened rhodamine 6G–Hg²⁺ complex acceptor. The sensor illustrated a very large Stokes shift up to 176 nm. In aqueous acetonitrile solutions, RG5H exhibited high selectivity and sensitivity toward Hg²⁺ in the presence of various competitive metal ions, such as Cu²⁺, Ag⁺, Zn²⁺, Pb²⁺, Ca²⁺, Cd²⁺, Co²⁺, Fe²⁺, Mg²⁺, Mn²⁺, Ba²⁺, Ni²⁺, Na⁺, Li⁺ and K⁺. The detection limit of RG5H for determination of Hg²⁺ was found to be 2.3 ppb. The binding of RG5H to Hg²⁺ was evident in both fluorescence enhancement as well as a colorimetric change in the sensor from greenish-yellow to orange, which could be easily observed by the naked eye.

中文翻译：

通过[5] ic烯和若丹明6G进行Hg ²⁺检测，对新的FRET系统进行比色和荧光传感†

设计并制备了一种基于[5]螺旋的“目视比色”和荧光传感器，该传感器通过酰肼部分RG5H与若丹明6G连接，可用于Hg ²⁺的高灵敏度和选择性检测。传感器系统通过FRET过程进行操作，从[5]螺旋烯供体到开环的若丹明6G–Hg ²⁺复合受体。传感器显示出非常大的斯托克斯位移，最大可达176 nm。在乙腈水溶液中，在各种竞争性金属离子（例如Cu 2 ⁺，Ag ⁺，Zn 2 ⁺，Pb ^2+）存在下，RG5H对Hg ²⁺表现出高选择性和敏感性。，Ca 2 ⁺，Cd 2 ⁺，Co 2 ⁺，Fe 2 ⁺，Mg 2 ⁺，Mn 2 ⁺，Ba 2 ⁺，Ni 2 ⁺，Na ⁺，Li ⁺和K ⁺。发现用于测定Hg ²⁺的RG5H的检出限为2.3 ppb。RG5H与Hg ²⁺的结合在荧光增强和传感器的色度变化（从绿黄色到橙色）中均很明显，这可以通过肉眼轻松观察到。

更新日期：2018-01-04

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