Highly efficient detection of Cu<sup>2+</sup> and B<sub>4</sub>O<sub>7</sub><sup>2−</sup> based on a recyclable asymmetric salamo‐based probe in aqueous medium
Xin Xu, Yajuan Li, Tao Feng, Wen‐Kui Dong, Yu‐Jie Ding
Abstract
Abstract An asymmetric salamo‐based probe molecule ( H 2 L ) was synthesized and characterized structurally. When DMF/H 2 O (9:1) was used as the solvent, it was shown probe H 2 L has high sensitivity to Cu 2+ . Using high‐resolution mass spectrometry and theoretical calculation, it was found that probe H 2 L could form a more stable complex (1:1) with Cu 2+ , the minimum limit of detection (LOD) of H 2 L for Cu 2+ was calculated as 9.95 × 10 −8 M. In addition, probe H 2 L could also be used to identify B 4 O 7 2− under the same detection conditions and the minimum LOD of H 2 L for B 4 O 7 2− was calculated as 4.98 × 10 −7 M. At the same time, density functional theory theoretical calculation further proved the flexibility of probe H 2 L . Through the action of EDTA, probe H 2 L had a cyclic ability to recognize Cu 2+ , and showed a better response in the physiological pH range; probe H 2 L had the characteristics of fast recognition speed and high efficiency. In addition, with probe H 2 L test paper for Cu 2+ and B 4 O 7 2− , the effect was more obvious. Meanwhile, probe H 2 L can be used to quantitatively detect Cu 2+ in water samples.