Over the past several years a number of research groups have been interested in utilizing nanoporous ceramic functionalized with silane anchored ligands as a way to bind “soft” heavy metals [1, 2]. In particular, much of this work has employed nanoporous materials derivatized with 3-mercaptopropyl(trimethoxy)silane as a means of sequestering Hg [3-14]. To a first approximation, one might predict that binding capacity would simply be limited by ligand to metal stoichiometry in these functional nanoporous systems. For very “soft” metal cations like Hg with a high affinity for thiols, this is approximately true. However, for “harder” metal cations this prediction is not accurate. In this communication, we summarize some of the binding capacities we have measured for other metals, along with a correlation that we have uncovered that allows for useful predictions to be made.
Revised: January 23, 2008 |
Published: January 30, 2006
Citation
Mattigod S.V., K.E. Parker, and G.E. Fryxell. 2006.Correlation of heavy metal binding capacity of thiol-SAMMS using the Misono softness parameter.Inorganic Chemistry Communications 9, no. 1:96-98.PNNL-SA-46568.