【摘要】 通过测定表面活性剂对HCPCF吸收光谱及溶解度的影响,研究了HCPCF与表面活性剂之间的作用机理。在酸性介质中表面活性剂主要起胶束增溶作用。根据HCPCF在不同极性溶剂中的吸收光谱确定,分子形态的HCPCF是处于表面活性剂胶束的憎水碳氢链部分。在碱性介质中,在CMC以下,非离子表面活性剂可以单分子形式与HCPCF及其金属络合物形成具有一定组成比的化合物,此化合物的溶解度与非离子表面活性剂的结构有关。非离子表面活性剂可能是由其聚乙氧基的氧原子和HCPCF的尚未离解的氢之间形成氢键而反应。更多还原

【Abstract】 The mechanism of interaction of 1,5-bis(2 hydroxy-5-chloro phenyl)-3-cyanoformazan(HCPCF)with surfactants has been investigated by analysing the effect of surfactants on the absorption spectra and solubilization of HCPCF reagent.In acidic medium the solubilization effect of the micelle of surfactants on the molecular form of HCPCF has been shown to be dominant. On the basis of comparison of corresponding spectra solubilized HCPCF molecules are considered to be located in the hydrophobic hydrocarbon core of surfactant’s micelle. In basic medium below critical micellar concentration the individual molecule of nonionic surfactants can react, with HCPCF as well as its metallic complexes in a definite ratio(2:1 in the case of Tween-80).The solubility of the compound formed is dependent on the structure of the nonionic surfactant’s molecule, particularly on the number of etlylene oxide groups in the hydrophilic part.It has been postula ed that the nonionic surfactants combine with HCPCF by forming hydrogen bonds between the undissociated hydrogen atoms of HCPCF anions and the oxygen atoms of the polyethylene oxide groups of nonionic surfactan s.更多还原