| Copper is one of the most abundant essential trace elements in the human bodyand has a fundamental role in sustaining important physiological processes. Copperplays a significant role in different catalytic processes ranging from providing energy,maintaining and repairing connective tissues related to hearts and arteries. It will doharm to people’s health, if the content of Cu2+is redundancy or deficiency. Theenvironmental pollution is serious presently, a lot of heavy metals including copperaccessing to the nature, and are intaked by human body. It has a serious impact onpeople’s health. So, there is an increasing requiremnet in the development of selectiveand sensitive copper sensors. Ultraviolet-visible spectrophotometry becomes a maintechnique in detecting metal ions compared with other spectroscopic methods,because of its advantages such as rapid, inexpensive and widely applied etc. In thispaper, a highly sensitive and selective copper ion chemosensor has been designed andsynthesized and an UV-visable spectrophotometry method was developed for copperion determination. The main works are as follows:(1) The existing form, the source of pollution, the preconcentration anddetermination methods and the UV-visable sensor of copper ion had been reviewedsimply.(2) The synthesis process of quinoline schiff base derivatives were improved, anda new sensor4-methyl-2-((quinolinyl-8-amino)methyl)phenol [MQAMP] wassynthesized throuth the modified experiment. The molecular structure had beencharacterized by1H NMR and MS.(3) The properties of MQAMP were studied in details. Under the optimumconditions, MQAMP showed selective and sensitive sensing for copper ions inethanol solution. The absorption spectrum of MQAMP exhibits typical absorptionbands at370nm. Upon addition of increasing amount of copper ions, a new peakgradually moves to longer wavelength finally reaching maximum value at469nm.The absorption band of chemosensor at370red shifted to469nm. The chemosensor shows a linear range for Cu2+from1.0×10-6to1.0×10-5mol/L, with a detection limitof1.1×10-7mol/L (3σ). The recovery rate of this senor is98.60%~108.00%, andshowing high sensitivity and selectivity. |
