Acta Phys. -Chim. Sin. ›› 1994, Vol. 10 ›› Issue (05): 418-423.doi: 10.3866/PKU.WHXB19940509

• ARTICLE • Previous Articles     Next Articles

Cupric (II)-2,2'-Biquinoline Transfer Across the Liquid/Liquid Interface and Kinetics of Complexation

Wang Han-Ming, Wang Er-Kang   

  1. Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Acadmey of Sciences, Changchun 130022
  • Received:1992-11-21 Revised:1993-05-22 Published:1994-05-15
  • Contact: Wang Er-Kang

Abstract:

Cupric (Ⅱ) ion transfer across the water/nitrobenzene interface facilitated by 2,2'-biqulnoline was investigated by cyclic voltammtry. Transfer process was controlled by diffusion. At [BQ]_(NB)>>[Cu~(2+)]_W, transfer ion was found to be 1:2 Cu~(2+)-biquinoline complex. Kinetics of complex action was described. Diffusion coefficient of Cu(BQ)~(2+)_2 in water phase was estimated as 3.8×10~(-5) cm~2/s and rate constant k of this complex action was determined as 2.6×10~(-4) s~(-1). At [Cu~(2+)]_W>>[BQ]_(NB), no transfer peaks were observed and 1:1 Cu~(2+)-biquinoline complex was formed.

Key words: Water/nitrobenzene interface, Cyclic voltammetry, Ion transfer, Kinetic of complexation, 2,2-biquinoline, Cupric (II)