Study on complex of Cu(II) with cyclen-o-tetrabenzenotetraamide by electrochemistry

✍ Scribed by Jinzhang Gao; Zunli Mo; Hong Chen; Jingwan Kang

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 181 KB
• Volume: 10
• Category: Article
• ISSN: 0895-7533
• DOI: 10.1002/(sici)1098-2728(1998)10:4<223::aid-lra4>3.0.co;2-6

✦ Synopsis

The electrochemical character of a new reagent cyclen-o-tetrabenzenotetraamide (CTBTA) with Cu(II) was studied. In C 6 H 4 (C 2 O 4 HK)-NaOH buffer (pH ‫ס‬ 4.00), there are three reduction peaks at oscillo-polarogram to the titled complex. Among them, the current of P2 peak at ‫63.0מ‬ V was directly proportional to the concentration of Cu(II) in the range of 7.5 ‫ן‬ 10 ‫8מ‬ -3.5 ‫ן‬ 10 ‫5מ‬ mol/L with a detection limit low to 3 ‫ן‬ 10 ‫8מ‬ mol/L. The composition ratio of the complex was formed to be 1:1 using a ratio method and the apparent stability constant to be 1.28 ‫ן‬ 10 6 . The proposed method was highly sensitive and selective and has been directly used to the determination trace amount of copper in rice.