Naslov
Metal complexation of thiacrown ether macrocycles by electrospray ionization mass spectrometry

Autori
Williams, S.M. ; Brodbelt, J.S. ; Marchand, A.P. ; Cal, D. ; Mlinarić-Majerski, Kata

Izvornik
Analytical Chemistry (0003-2700) 74 (2002); 4423-4433

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Quadrupole ion-trap; Caged crown ligands; Binding selectivities; Aqueous-solutions; Extraction; Constants; Mercury

Sažetak
In the present study, electrospray ionization mass spectrometry is used to evaluate the metal-binding selectivities of an array. of novel caged macrocycles for mercury(II), lead(II), cadmium(II), and zinc(II). ions. In homogeneous methanol/chloroform. solutions. as well as, extractions of metals from aqueous solution by. macrocycles in chloroform, it is found that the type of heteroatom (S, O, N), cavity, size, and presence of other substituents. influence the, metal selectivities. Several of the macrocycles in this study bind mercury ion selectively and efficiently in the presence of many other metal ions and have, an avidity toward mercury that was tunable by the size and combination of heteroatoms in the macrocycle ring and the number of cage groups attached. The extraction mechanism was further investigated by determining the variation in extraction selectivity as a function of the counterions of the mercury salts.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA