Synthesis of new dithiocarbamate-based organosilanes for grafting on silica

A new and mild method was developed for the chemoselective conversion of mono-, his- and tris-ammosiloxanes into their corresponding mono-, his- and tris-dithiocarbamates, using alkaline hydrides and carbon disulfide in THF. Enhanced scavenging capacity towards mercury ions was observed when these compounds were grafted on silica compared to amine-functionalized silicas or to commercial resins bearing dithiocarbamate moieties. (c) 2007 Elsevier Ltd. All rights reserved.