β-环糊精与表面活性剂共存的显色体系中化学平衡的研究

Studies on the Chemical Equilibrium of Color Systems in the Presence of β-Cyclodextrin and Surfactant

本文研究β-环糊精(β-CD)对Ni-CAS-CPB,Ni-5-Cl-PADAB-SDBS,Ni-5-Br～DEPAP-Triton X-100三体系的作用.从以下三个方面:(1)β-CD对显色剂、显色配合物的影响;(2)β-CD与表面活性剂(SF)的作用;(3)SF与Ni-R之间的作用探讨了β-环糊精、表面活性剂或它们的混合物对显色平衡的影响,用表面张力法测定了β-CD与SF,β-CD与Ni-R-SF的包合常数(K_f和K’_f),并用包合常数的相对差值△K_f/K_f(△K_f=K_f-K’_f)衡量Ni-R(?)SF的作用强弱,结合K_f,值较深入地探讨了影响显色平衡的主要因素及产生协同增敏作用的原因.

The effects of β-cyclodextrin (β-CD) on a series of color systems containing surfactant (SF), such as Ni-CAS-CPB, Ni-5-Cl-PADAB-SDBS, Ni-5-Br-DEPAP-TritonX-100 were studied. The influencing factors on the chemical equilibriumsin the presence of β-CD and surfactant were dissussed in the following respects : (1)the effects of β-CD on the color agents and their complexes; (2)the interactions between β-CD and surfactant; (3)the interactions of surfactant with the complexes (Ni-R). The inclusion formation contants ( Kf and K'f ) of β-CD with surfactant and Ni-R -surfactant were determined by surface tension method. The values of correlative variation of inclusion formation constant ( △Kf/Kf,△Kf =Kf - K'f ) were calculated. The results showed that the main influencing factors are the interactions of β-CD with surfactant and the complexes (Ni-R) with surfactant. From the △Kf/Kf and Kf , the preliminary conclusions of the synergistic sensitizing effect on color systems in the presence of β-CD and surfactant have been deduced.