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Full-Text Articles in Physical Sciences and Mathematics
A Conductance Study Of Complexes Of Rare Earth With Cryptand (2.2) In Nonaqueous Solvents, Shichang Liu, Aiju Xu, Qiang Zhang
A Conductance Study Of Complexes Of Rare Earth With Cryptand (2.2) In Nonaqueous Solvents, Shichang Liu, Aiju Xu, Qiang Zhang
Journal of Electrochemistry
The coordination reaction of several rare earth nitrates with cryptand (2.2) in (CH 3) 2CO, CH 3CN, CH 3OH and DMF at 25 ℃ has been studied by means of using conductometric titration. The stability constants and the molar conductivities for the 1∶1 coordination compounds were calculated. Since the complexation is accompanied by solvation of the Ln(Ⅲ) ion in nonaqueous solvents, for lanthanide series, there is more or less variation in stability constants of complexes of rare earth with cryptand (2.2) when atomic numbers increas. The orders of the Λ ML(NO 3) 3 values about the same rare earth crown …
Polarographic And Voltammetric Behaviour Of Complex Of Ciprofloxacin With Manganese, Jialing Zhang, Fan Fan, Huizhi Huizhi, Jinghao Pan
Polarographic And Voltammetric Behaviour Of Complex Of Ciprofloxacin With Manganese, Jialing Zhang, Fan Fan, Huizhi Huizhi, Jinghao Pan
Journal of Electrochemistry
In 0.1 mol·L -1 NH 3 NH 4Cl buffer solution(pH 9.2),a sensitive reduction peak of complex of ciprofloxacin (CPFX) with manganese (Mn) was obtained by single sweep oscillopolarograph. The peak potential( Ep ) is -1.61 V(vs.SCE). The peak current ( i p) is proportional to the concentration of Mn(Ⅱ) over the range of 5×10 -6 ～2×10 -5 mol·L -1 . It is possible to be applied to the determination of Mn(Ⅱ). The polarographyic and voltammetric behaviour of complex was studied in detail. The ratio of CPFX∶Mn in the complex was 2∶1. The electrode reaction mechanism was discussed.