Highly efficient detection of Cu2+and B4O72-based on a recyclable asymmetric salamo-based probe in aqueous medium

An asymmetric salamo-based probe molecule (H2L) was synthesized and characterized structurally. When DMF/H2O (9:1) was used as the solvent, it was shown probeH(2)Lhas high sensitivity to Cu2+. Using high-resolution mass spectrometry and theoretical calculation, it was found that probeH(2)Lcould form a more stable complex (1:1) with Cu2+, the minimum limit of detection (LOD) ofH(2)Lfor Cu(2+)was calculated as 9.95 x 10(-8)M. In addition, probeH(2)Lcould also be used to identify B(4)O(7)(2-)under the same detection conditions and the minimum LOD ofH(2)Lfor B(4)O(7)(2-)was calculated as 4.98 x 10(-7)M. At the same time, density functional theory theoretical calculation further proved the flexibility of probeH(2)L. Through the action of EDTA, probeH(2)Lhad a cyclic ability to recognize Cu2+, and showed a better response in the physiological pH range; probeH(2)Lhad the characteristics of fast recognition speed and high efficiency. In addition, with probeH(2)Ltest paper for Cu(2+)and B4O72-, the effect was more obvious. Meanwhile, probeH(2)Lcan be used to quantitatively detect Cu(2+)in water samples.

Automated summary

A new asymmetric salamo-based probe molecule H2L was synthesized with high sensitivity and stability in detecting Cu2+ and B4O72-. The probe showed good response and efficiency in physiological pH range, and could quantitatively detect Cu2+ in water samples.