A Study on Complexation and Transport of Cr(III) Through a Chromogenic Aza Crown Liquid Membrane

作者：Mehta H S; Kaur H; Menon S K^*

来源：Journal of Macromolecular Science Part A-Pure and Applied Chemistry, 2011, 48(2): 148-154.

DOI：10.1080/10601325.2011.537530

• Chromogenic azacrown ether
• Cr(III) transport
• liquid membrane
• spectrophotometry

A new chromogenic aza-crown-ether N-(8-hydroxyquinoline-7-methylene)-4-azadibenzo-18-crown-6-ether (HQMADCE) was synthesized through the condensation reaction of 4-azadibenzo-18-crown-6-ether, 8-hydroxy quinoline and formaldehyde. The synthesized chromogenic crown was characterized by various spectroscopic techniques and its complexation with Cr(III) was studied. The parameters like extraction constant (K(ex)), stability constant (beta), free energy change (Delta G), enthalpy change (Delta H) and change in entropy (Delta S) were calculated. Subsequently transport of Cr(III) through a bulk liquid membrane containing HQMADCE as carrier was studied. The permeation of metal was investigated as a function of various experimental variables viz. pH, carrier concentration, metal concentration and time. Furthermore, interference by other ions was also studied.

• 出版日期2011