以一种新的钴(Ⅱ)与meso-四-(2-烷氧基苯基)卟吩生成的配合物为中性载体的碘离子选择电极的制备及性能
Preparation and Study of Iodide Ion Selective Electrode Using a New Coordination Complex of Cobalt(Ⅱ) and meso-Tetrakis-(2-alkoxyphenyl)-porphyrin as Neutral Carriers
摘 要
meso-四-(2-烷氧基苯基)卟吩[(ROP)P]与金属离子Co(Ⅱ)、Cu(Ⅱ)、Ni(Ⅱ)生成配合物,并以元素分析验证其组成,用以上配合物作为中性载体,制备了电位型离子选择性电极,电极膜组分的最佳配比用正交法选定.结果表明:在上述3种载体中[Co(Ⅱ)-(ROP)P]作为载体的电极对I-具有最好的电位响应特性.在pH 3.0的磷酸盐缓冲体系中该电极具有最佳的电位响应,在1.0×10-6~1.0×10-1mol·L-1浓度范围内呈近能斯特响应,斜率为-58.2 mV/dec(25 ℃),检出限(3S/N)为8.0×10-7mol·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.
碘离子选择电极
钴(Ⅱ)配合物
钴(Ⅱ)
中性载体
meso-Tetrakis-(2-alkoxyphenyl)-porphyrin
I--ion selective electrode
Coordination complex
Cobalt(Ⅱ)
Neutral carrier
Abstract
Coordination complexes of meso-tetrakis-(2-alkoxyphenyl)-porphrin [(ROP)P] with metal ions,i.e.Co(Ⅱ),Ni(Ⅱ) and Cu(Ⅱ) were prepared and their compositions were identified by elementary analysis.Ion selective electrodes were prepared by using the new complexes as neutral carriers,and composition of the electrode membrane was selected by the method of orthogonal testing.It was found that ISE using [Co(Ⅱ)-(ROP)P] as neutral carrier showed best potential response toward I--ion among the 3 complexes.Optimum potential response was attained in a phosphate buffer medium of pH 3.0.Approximate nernst response (at 25 ℃) was obtained in the range of 1.0×10-6-1.0×10-1mol·L-1 of I--ion with its detection limit (3S/N) of 8.0×10-7mol·L-1,and with its slope of -58.2 mV/dec.Electrochemical behavior and potential response mechanism of the electrode were studied by the UV-VIS spectroscopy and the AC impedance of the membrane.
中图分类号 O657.1
所属栏目 试验与研究
基金项目 重庆市教委科研项目(KJ081103)资助
收稿日期 2008/3/4
修改稿日期
网络出版日期
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备注梁克中(1969-),男,重庆大足人,副教授,硕士,主要研究方向为电化学.
引用该论文: LIANG Ke-zhong,MU Wei-jun. Preparation and Study of Iodide Ion Selective Electrode Using a New Coordination Complex of Cobalt(Ⅱ) and meso-Tetrakis-(2-alkoxyphenyl)-porphyrin as Neutral Carriers[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2009, 45(5): 508～511
梁克中,牟维君. 以一种新的钴(Ⅱ)与meso-四-(2-烷氧基苯基)卟吩生成的配合物为中性载体的碘离子选择电极的制备及性能[J]. 理化检验－化学分册, 2009, 45(5): 508～511
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参考文献
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【4】柴雅琴,许文菊,袁若.汞配合物为载体的高灵敏PVC膜碘离子选择电极研究[J].化学学报,2004,62(13):1226-1229．
【5】BHLMANN P,PRETSCH E,BAKKER E.Carrier-based ion-selective electrodes and bulk optodes: II.Ionophores for potemtiometric and optical sensors[J].Chem Rev,1998,98:1593-1687．
【6】李俊忠,胡敏.脂溶性酞菁钴(Ⅱ)为载体的高选择性亚硝酸根PVC膜电极[J].化学学报,1995,53(11):1118-1123．
【7】AMINI M K,SHAHROKHIAN S,TANGESTANINEJAD S.Thiocyanate-selective electrodes based on nickel and iron phthalocyanines[J].Anal Chim Acta,1999,402(1/2):137-143．
【8】XU Wen-ju,CHAI Ya-qing,YUAN Ruo.A novel thiocyanate-selective electrode based on a zinc-phthalocyanine complex[J].Anal Bioanal Chem,2006,385:926-930．
【9】刘冬,陈文灿,何德良.以双核有机锡化合物为载体的PVC膜碳酸根离子敏感电极[J].高等学校化学学报,1996,17(10):1528-1531．
【10】CHANIOTAKIS N A,PARK S B,MEYERHOFF M E.Salicylate-selective membrane electrode baed on Tin(Ⅳ) tetraphenylporphyrin[J].Anal Chem,1989,61(3):566-570．
【11】GAO De,LI Jiang-zhou,ZHENG Guo-pin.Metalloporphyrin derivatives as neutral carriers for PVC membrane electrodes[J].Anal Chem,1994,66(14):2245-2249．
【12】彭圣明,赵鸿斌,谢琼玉.Meso-四(邻烷氧基苯基)卟啉金属合钴的合成、表征和性能研究[J].无机化学学报,2005,21(8):1160-1164．
【13】HORNING E C.Organic synthesis collect: Val.Ⅲ [M].New York: John Wiley,1955:140-141．
【14】LIU Dong,SHEN Guo-li,YU Ru-qin.Polymeric membrane salicylate-sensitive electrodes based on organotin(Ⅳ) carboxylates[J].Analyst,1996,121(10):1495-1499．
【15】SONG You-qiang,YUAN Ruo,YING Min.A highly selective iodide electrode based on the bis(denzoin)-semi ethylenediamine complex of mercury(Ⅱ) as a carrier[J].Fresenius′ J Anal Chem,1998,360(1):47-51．
【16】CHANIOTAKIS N A,CHASSER A M,MEYERHOFF M E.Influence of porphyrin structure on anion selectivities of manganese(Ⅲ) porphyrin based membrane electrodes[J].Anal Chem,1988,60(2):185-188．
【17】刘冬,袁若,陈文灿.以钴Schiff碱配合物为载体的PVC膜碘离子选择性电极的研究[J].高等学校化学学报,1994,15(7):991-993．
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