| Metal ions exist widely in nature. Air, water and soil are polluted by metal ions coming from people’s producting and living. As some essential trace elements in biological system, metal ions play indispensable parts in chemical and biological process in most of living things. But there is an evidence indicated that their imbalance induce great harm to livings’ health, So it is particularly important research of the metal ions detecting in our life. The methods of metal ions detecting, with advantages and drawbacks, have been reported in many papers, ultraviolet visible spectroscopy and fluorescence spectrometry have recived great attention.In this paper, we have synthesized six different organic small molecule probes for detecting Cu2+ and Fe3+ by ultraviolet visible spectrometry and fluorescence spectrometry, and study on following ways:(1) The synthesis and characterization of rohodamine probes:we synthesized two sets of rohodamine probes via SN2 reaction and addition-elimination process. All of unknown compounds were characterized by HRMS,1H NMR,13C NMR and IR.(2) Investigation of Cu2+ probes’ spectrum properties:The spectrum properties of RP1, RP2 and RP3, including selectivity, anti-interference, pH curve, concentration-gradient curve, Job curve and reversibility, were study by uv-visible spectrometry. The results show that these three probes exhibit high selectivities to Cu2+ than other metal ions. And the recognition process is quickly, reversible and naked eye visible.(3) Investigation of Fe3+ probes’ spectrum properties:With obvious structural difference, RP4, RP5 and RP6 are three different fluorescence probes for detecting Fe3+. Through the test of selectivity, anti-interference, Job curve, concentration-gradient curve, pH curve and reversibility, it is observed that they have high selectivity to Fe3+ than other metal ions. Besides the high selectivity, anti-interference and reversibility are excellent in detection process. |
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