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    • Investigation of properties of rare earth complexes with dibromo-p-methyl-methylsulfonazo by spectral correction technique

      Hong-Wen Gao Fa-Shui Hong Qing-Song Ye

      Volume 112 Issue 6 December 2000 pp 573-578

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/112/06/0573-0578

    • Keywords

       

      Spectral correction technique; rare earth; dibromo-p-methyl-methylsulfonazo (DBMMSA)

    • Abstract

       

      The reactions were sensitive between seven rare earth (RE) metals Nd(III), La(III), Ce(III), Pr(III), Sm(III), Eu(III) and Gd(III) and dibromo-p-methylmethylsulfonazo (DBMMSA) in acidic solution. The spectral correction method has been applied in the determination of properties of RE complexes instead of ordinary spectrophotometry. Composition ratios, real molar absorptivities (ε) and stepwise stability constants (K) of each of the RE complexes were determined easily because the method eliminated the absorption influence of excess of ligand on complex. Results showed that the cumulativeK values of the complexes were between 3.91 × 1014 and 2.34 × 1028 and the real (not apparent) absorptivity between 8.85 × 104 and 2.12 × 105 l mol-1cm-1 at 640 nm.

    • Author Affiliations

       

      Hong-Wen Gao1 Fa-Shui Hong2 Qing-Song Ye2

      1. School of Chemistry and Chemical Engineering, Anhui University, Hefei - 230039, P. R. China
      2. Department of Biological Science, Huaibei Coal Teachers College, Huaibei - 235000, P. R. China

    • Dates

       
      Published
      December 2000
      Manuscript received
      13 January 2000
      Manuscript revised
      29 May 2000

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