磺化硫杂杯[4]芳烃修饰纳米金的制备及对水溶液中Cr^3＋的比色检测  

Colorimetric Detection of Cr^(3+) in Aqueous Solution by Thiacalix[4]arene Tetrasulfonate Modified Gold Nanoparticles

作　　者：孙忠月[1] 郑秋玲[1] 李海兵[1] 

机构地区：[1]华中师范大学化学学院,农药与化学生物学教育部重点实验室,武汉430079

出　　处：《高等学校化学学报》2011年第9期2219-2222,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21072072);湖北省优秀创新群体(批准号:2009CDA048);华中师范大学基本科研业务费专项资金自主科研项目(批准号:CCNU09AO200)资助

摘　　要：采用绿色合成方法,在不需外加还原剂的条件下一步原位合成了磺化硫杂杯[4]芳烃修饰的纳米金,所制备的纳米金在水溶液中分散性好,粒径比较均一,尺寸分布在(8±1)nm范围内.将制得的纳米金应用于金属离子的比色检测,结果表明,由于Cr3+与纳米金表面的配体具有强的配位作用,因而该纳米金能够选择性识别Cr3+,在去离子水样和实际水样中其检出限分别为1和2.5μmol/L.可见,采用磺化硫杂杯[4]芳烃修饰的纳米金可实现对水溶液中Cr3+的快速检测.Thiacalix[4]arene tetrasulfonate modified gold nanoparticles were used as colorimetric probes for heavy metal ions detection,which were synthesized by one step without external reducing agent.Those Au NPs are highly dispersed and uniform in aqueous solution,with an average diameter（8±1） nm.The research indicates that thiacalix[4]arene tetrasulfonate modified Au NPs are capable of detecting Cr3＋ with high selectivity,owing to the coordination between Cr3＋ and the ligand.The colorimetric detection limit is 1 μmol/L.Moreover,those probes can be applied in the detection of Cr3＋ in drinking water,with a detection limit of 2.5 μmol/L.The modified Au NPs could be utilized as colorimetric probes for rapid qualitative analysis of Cr3＋.

关 键 词：芳烃 金纳米粒子 CR3+ 比色检测 

分 类 号：O657[理学—分析化学]