The Synthesis And Properties Of Chemosensing Materials For Copper Ion

The great importance of copper in biological, environmental and industrialsystems has attracted considerable interest. Due to its remarkable properties,determination of copper ion plays a signiifcan role in a wide range of chemical andbiological processes. Various analytical methods including atomic absorptionspectroscopy（AAS）, inductively coupled plasma atomic emission or massspectroscopy（ICP-AES, ICP-MS） have been widely used for detection of heavymetals even at very low concentrations. However, these methods are intricate, costlyand requiring complicated operation. Thus, there is a need for a rapid and sensitivemethod for the determination of Cu²⁺. Simple and inexpensive colorimetric andfluorescence sensors probes are becoming eiffcacious methods for monitoring copperin aqueous system. Our work is focused on the design and synthesis of twochemosensor， and carried out in two parts：The ifrst part, we have successfully obtained a new colorimetric chemosensor（CS1） for Cu²⁺ with high selectivity. Based on the fact that different coordinatingbehaviors of Cu+and Cu²⁺ with CS1and that Cu+ions can be oxidized to Cu²⁺ ions byCIO", CS1can act as a potential probe for hypochlorite. The sensing property of CS1for CIO" is investigated. Moreover, an AND logic gate system has been designedbased on oxidation property of hypochlorite, with small molecules as inputs andoutputs. Hereby，we have realized molecular logic operations. We conduct an ANDlogic gate function with Cu+and CIO" as inputs and A552nm/A398nm as output, and thisfu"nction can be reset by S2. This may be a novel idea to develop new chemosensorsfor oxidants.The second part, a novel selective lfuorescent chemosensor based on anpyrenyl-appended derivative （CB1） was synthesized and characterized. Oncecombined with Cu²⁺, it displayed high speciifcity and sensitivity. Among the variouscations, only Cu²⁺ induced the lfuoresecence of CB1，which was quenched by Cu²⁺ inmixed aqueous system （DMS0:H20=7:3，V:V）. What’s more，With the addition ofCu²⁺, compound CB1could give rise to a visible yellow-to-green color change andfluorescence quenching. The resulting yellow solution could change to green andregenerate to fluorescence quenching upon the addition of Cu²⁺ anion; however, nochanges were observed in the presence of other cations, making compound CB1an extremely selective for Cu²⁺ and an easy prepared lfuoresecence and UV-Vis dualchannel probe for copper ion.