SOLUBILITY OF CHELATING-AGENTS AND METAL-CONTAINING COMPOUNDS IN SUPERCRITICAL-FLUID CARBON-DIOXIDE

Authors
SMART NG CARLESON T KAST T CLIFFORD AA BURFORD MD WAI CM
Citation
Ng. Smart et al., SOLUBILITY OF CHELATING-AGENTS AND METAL-CONTAINING COMPOUNDS IN SUPERCRITICAL-FLUID CARBON-DIOXIDE, Talanta, 44(2), 1997, pp. 137-150
Citations number
62
Journal title
Talanta
ISSN journal
00399140 → ACNP
Volume
44
Issue
2
Year of publication
1997
Pages
137 - 150
Database
ISI
SICI code
0039-9140(1997)44:2<137:SOCAMC>2.0.ZU;2-Z
Abstract
The solubility of 49 metal-containing compounds and 15 ''free'' ligand s in supercritical fluid carbon dioxide is reviewed. Solubilities were found to range over eight orders of magnitude, with the highest value of solubility being 56 g l(-1). Metals complexed with fluorine substi tuted ligands were found to be the most soluble, and metals complexed with phenyl-substituted ligands the least soluble. A general trend for increasing solubility with increasing oxidation state is observed and this is correlated with the increased number of coordinating ligands protecting the metal center from interaction with the supercritical fl uid and also due to the increased number of solvation interactions wit h the increased number of ligand groups.