Scopul nostru este sprijinirea şi promovarea cercetării ştiinţifice şi facilitarea comunicării între cercetătorii români din întreaga lume.
Autori: Bogdan SERBAN, Elena RUSE, Mihaela MINCA, Iulian PASARE, Gheorghe NECHIFOR
Editorial: Revista de Chimie, 51(4), p.249-258, 2000.
When a chromophoric group is introduced into the appropriate position in calixarenes one may expect novel association and spectral properties.This paper describes the synthesis of two “chcomophoric calixarenes” by coupling reactions between calixarene and diazonium salts corresponding to 4 amino benzo 15-crown-5 and sulphanilic acid. Coupling reactions were carried out in heterogeneous medium in order to diminishing the rate of coupling and avoid the introductionof chromophoric azo-group in all p- positions. The metall complexation behaviour of newly prepared compounds was investigated with the help of UV-VIS and IR spectroscopy. The facilitated transport with azo-calixarene derivatives of some cations through ferrofluid membranes was studied.
Cuvinte cheie: calixarene, azocalixarene, membrane transport, liquid membranes