双核汞(Ⅱ)席夫碱配合物为中性载体的碘离子选择性电极研究
STUDY ON THE IODIDE ISE USING THE BINUCLEAR MERCURY(Ⅱ)-SCHIFF′S BASE COMPLEX AS NEUTRAL CARRIER
摘 要
研制了以双核汞(Ⅱ)-4-甲基-2,6-谷氨酸-酚配合物(简写作Hg(Ⅱ)2-MGAP)为中性载体的电位型阴离子选择性电极,并研究其电化学特性.结果表明,该电极对I-具有良好的电位响应特性,且呈现反Hofmeister行为,其选择性序列为：I->Sal->ClO-4>NO-2>Br->NO-3>F->SCN->SO2-3.在pH 2.5的磷酸盐缓冲体系中该电极对I-具有最佳的电位响应,在7.0×10-7-1.0×10-1mol·L-1浓度范围内呈近能斯特响应,斜率为-53.1 mV·dec-1(25 ℃),检出限为9.0×10-7mol·L-1,用交流阻抗及紫外可见光谱技术研究了电极的响应机理,并初步地将电极用于药品分析.
中性载体
碘离子
离子选择性电极
Binuclear Hg(Ⅱ)-4-methyl-2,6-glutamic acid-phenolate complex
Neutral carrier
Iodide
Ion-selective electrode
Abstract
A new potential iodide ion selective electrode by using the coordination complex of binuclear mercury(Ⅱ) 4-methyl-(2,6-glutamic acid)-phenolate [abbreviated as Hg(Ⅱ)2-MGAP] as neutral carrier was prepared and its electrochemical behavior studied.It was found that this electrode showed anti-Hofmeister behavior and good potential response toward iodide ion in the concentration range of 7.0×10-7-1.0×10-1mol·L-1,with a detection limit of 9.0×10-7mol·L-1,and a slope of -53.1 mV·dec-1 in a phosphate buffer solution of pH 25 at 25 ℃.Selectivity of this electrode towards some common anions was found to be in the following order: I->Sal->ClO-4>NO-2>Br->NO-3>F->SCN->SO2-3.The response mechanism of the electrode was studied by UV-VIS spectrometry and AC impedance technique.The application of this electrode to the analysis of drug samples was studied tentatively.
中图分类号 O657.1
所属栏目 试验与研究
基金项目 重庆市自然科学基金(CSTC-2004BB4149)及西南师范大学博士项目基金(swnuB2004021)资助.
收稿日期 2005/4/27
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备注归国风(1979-),女,河南人,硕士研究生,主要从事电化学传感器的研究.
引用该论文: GUI Guo-feng,CHAI Ya-qin,YUAN Ruo,SUN Ai-li. STUDY ON THE IODIDE ISE USING THE BINUCLEAR MERCURY(Ⅱ)-SCHIFF′S BASE COMPLEX AS NEUTRAL CARRIER[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2006, 42(5): 325～328
归国风,柴雅琴,袁若,孙爱丽. 双核汞(Ⅱ)席夫碱配合物为中性载体的碘离子选择性电极研究[J]. 理化检验－化学分册, 2006, 42(5): 325～328
被引情况:
【1】王永燎,刘峥, "配合物修饰电极的制备及其在环境和生物分析中的应用",理化检验－化学分册 46, 980-983(2010)
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参考文献
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【3】Schulthes P,Amman D,Krautler B,et al.Nitrite-Selective Liquid Membrance Electrodes[J].Anal Chem,1985,57(7):1397-1401.
【4】Yuan R,Chai Y Q,Liu D,et al.Schiff Base Complexes of Cobalt(Ⅱ) as Neutral Carriers for Highly Selective Iodide Electrodes[J].Anal Chem,1993,65(19):2572-2575.
【5】Li Z Q,Yuan R,Ying M,et al.Iodide-Selective PVC Membrane Electrodes Based on Five Transitional Metal Chelates of Bis-Furfural-SemI-o-Tolidine[J].Anal Lett,1997,30(8):1455-1464.
【6】Yuan R,Song Y Q,Chai Y Q,et al.Desigh of Schiff Base Complexes of Co(Ⅱ) for the Prepration of Iodide-Selective Polymeric Membrance Electrodes[J].Talanta,1999,48:649-657.
【7】柴雅琴,许文菊,袁若.二氮杂四烯基金属配合物中性载体高选择性水杨酸根离子电极的研究[J].化学学报,2002,60(12):2192-2196.
【8】刘东,陈文灿,何德良,等.以双核有机锡化合物为载体的PVC膜磷酸根敏感电极[J].高等化学学报,1996,17(10):1528-1531.
【9】Yuan R,Wang X L,Chai Y Q,et al.Highly Selective Thiocyanate Electrode Based on Bis-Bebzoin-Semitriethylene Tetraamine Binuclear Copper(Ⅱ) Complex as Neutral Carrier[J].Electrochem commun,2003,5(8):717-721.
【10】Daunert S,Bachas L G.Anion-Selective Electrodes Based on a Hydrophobic Vitamin B12 Derivative[J].Anal Chem,1989,61(5):499-503.
【11】方岳平,莫蔚明,曾建强.席夫碱双核配合物的合成与表征[J].广西师范大学学报,1997,15(4):77-80.
【12】Denton D A,Susceitzky H.Synthetic Uses of Polyphosphoric Acid[J].J Chem Soc,1963,10:4741-4743.
【13】Horning E C.Org Synth Coll Vol Ⅲ[M].New York: John Wiley,1995.140-141.
【14】Moody G L,Oke R B,Thomas J D R.As Calcium-Sensitive Electrode Based on a Liquid ion Exchanger in a Poly (Vinyl Chloride) Matrix[J].Analyst,1970,95:910-918.
【15】Chaniotakis N A,Park S B,Meyerhoff M E.Salicylate-Selective Membrane Electrode Based on Tin(Ⅳ)-Tetraphenylporphyrin[J].Anal Chem,1989,61(6):566-570.
【16】Shamsipur M,Soleymanpour A,Akhond M,et al.Iodide-Selective Carbon Paste Electrodes Based on Recently Synthesized Schiff Base Complexes of Fe(Ⅲ)[J].Anal Chim Acta,2001,450:37-44.
【17】Pouretedal R H,Keshavarz M H.Copper(Ⅰ)-Bathocuproine Complex as Carrier in Iodide-Selective Electrode[J].Talanta,2004,62:223-227.
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