Glycosylated metalloporphyrins as neutral carriers for PVC membrane electrodes.
In this paper, the synthesis of a novel ionophore, chloro[5,10,15,20-tetrakis[2-(2,3,4,6-tetraacetyl-beta-D-glucopyranosyl)-1-O-phenyl]porphinato]manganese (MnT(o-glu)PPCl), and its application as a neutral carrier for a PVC membrane electrode are described. The MnT(o-glu)PPCl-based PVC membrane electrode shows a potentiometric responses to SCN- over a concentration range of 3.4 x 10(-7) - 1.0 x 10(-1) mol L(-1) with a Nernstian slope and a response time of 20 s. The electrode exhibits an anti-Hofmeister selectivity toward SCN- with respect to common coexisting anions. As active materials, MnT(o-glu)PPCl shows better selectivity toward SCN- than chloro(tetraphenylporphinato)manganese (MnTPPCl). The effect of the electrode membrane compositions has been studied and the experimental conditions were optimized. The electrode was applied to the determination of SCN- in body fluids with satisfactory results.
Li
Zhi-Zhang
ZZ
College of Chemistry and Chemical Engineering, Hunan University, Changsha, P R China.
Zhang
Xiao-Bing
XB
Guo
Can-Cheng
CC
Shen
Guo-Li
GL
Yu
Ru-Qin
RQ
D015374:Biosensing Techniques / Q000379:methods; D002240:Carbohydrate Sequence; D004566:Electrodes; D006031:Glycosylation; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008567:Membranes, Artificial; D008665:Metalloporphyrins / Q000737:chemistry*; D015394:Molecular Structure; D010968:Plasticizers / Q000737:chemistry; D011143:Polyvinyl Chloride / Q000737:chemistry*; D012680:Sensitivity and Specificity; D013861:Thiocyanates / Q000737:chemistry / Q000652:urine
D008567:Membranes, Artificial; D008665:Metalloporphyrins; D010968:Plasticizers; D013861:Thiocyanates; D011143:Polyvinyl Chloride