The competitive and selective transport of metal cations through bulk liquid membrane by 5,6,11,12-tetraphenyl-1,2,4,7,8,10-hexa azo-cyclododeca-4,6,10,12-tetra-N-9,4-ditione and new synthesized phosphorus-nitrogen compound, (CF3C(O)NH)(C6H11NH)P(O)[NHCH2C(CH3)2CH2NH]P(O)(NHC6H11)(NHC(O)CF3) Vahideh Ghaffari,a* Razieh Sanavi Khoshnooda, Fatemeh Karimi Ahmadabad,bMehrdad Pourayoubi, Hossein Eshtiagh-Hosseini aDepartment of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran bDepartment of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran The competitive metal ion transport experiments of Co+2,Cd+2,Ag+,Pb+2,Ni+2and Pb2+cations were carried by the title ligandsusing chloroform (CHCl3), dichloromethane (DCM), 1,2-dichloroethane (1,2-DCE), nitrobenzene (NB), dichloromethane/1,2-dichloroethane(DCM/1,2-DCE)and dichloromethane/nitrobenzene(DCM-NB). The(CF3C(O)NH)(C6H11NH)P(O)[NHCH2C(CH3)2CH2NH]P(O)(NHC6H11)(NHC(O)CF3)ligand was synthesized as the following procedure: to a solution of (CF3CONH)P(O)(NHC6H11)(Cl)](1.708mmol) in dry chloroform,asolution of 2,2-dimethyl 1,3-propanediamine (0.854mmol) and Et3N (1.708mmol)in dry chloroform was added at 273 K. After 5 h stirring, the solvent wasremoved and the product was washed with distilled water. In transport of metal cations, the source phase contained equimolar concentrations of the metal cations and buffer solution(CH3COOH/CH3COONa)at pH = 4.9 and the receiving phase being buffered at pH = 3 by buffersolution (HCOOH/HCOONa).The organic phaseconsisted of the ligand as an ionophore. The obtained results show that the selectivity and efficiency of transport for these metal cations change with the nature of ligand. The highesttransportation was observed for Cu2+cation.The transport rate for cupper (II) cation was changed as the sequence of1,2-DCE > CHCl3> DCM >NB.A non-linearrelationship was observed for the variations of transport rate of Cu2+cations with the composition of DCM/1,2-DCE and DCM/NB binary mixture for ligand5,6,11,12-tetraphenyl-1,2,4,7,8,10-hexa azocyclododeca-4,6,10,12-tetra-N-9,4-ditione. The influence of the nature of carboxylic acids (stearic, fumaric and maleic acids) as surfactant was also investigated in the membrane phase on the transport of metal cations[1]. Keywords: Transport, Extraction, liquid membrane, Metal cations References [1] G.H.Rounaghi, M.H. Arbab-Zavar and E.Fahmideeh-Rad, Asian journal of Chemistry, 21(2009) 1389-1399.

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