Selective complexation of copper ions in monolayers of a new amphiphilic cage molecule at the liquid/air and liquid/liquid interfaces

摘要: Abstract We report studies of a newly synthesized cyclam derivative with four chain substituents (tetra-( N -2-tetradecyl-carboxamidoethyl)-tetraazacyclotetradecane; TC14) which could be interest for the selective liquid–liquid extraction cations. investigated monolayer properties TC14 molecules spread at aqueous solution/air interface by surface pressure–area isotherm measurements and Brewster angle microscopy. Surface isotherms were also performed solution/decane new interfacial Langmuir trough. The effects salt concentration in solutions (CuCl 2 , NaCl CsCl) on related to binding cations cage molecule interface. It was found that film sensitive presence ions phase, particularly high-pressure region isotherm, where collapses. balance technique revealed preferential complexation Cu 2+ permitted us detect very small ion concentrations subphase.