Sulfonate modified nanocrystals

摘要

A nanoparticle having one or more phosphonates or phosphinate ligands on their surface can be converted into nanoparticles with sulfonate ligands on their surface, by contacting the phosphonate-containing nanoparticles with a silylsulfonate reagent. Such nanoparticles are activated toward reactions with nucleophilic groups; thus the method provides activated nanoparticles, and methods of making and using them to produce modified nanoparticles.

主权项

1. A population of nanoparticles, comprising:
a plurality of nanoparticles dispersed in an organic solvent, wherein each nanoparticle includes a nanocrystal core including a first semiconductor material, a shell including a second semiconductor material, and an outer layer comprising ligands that each comprise a sulfonate, nitrate, borate, or fluorous anion group, wherein the anion group is bound to one or more metal atoms of the second semiconductor material at the surface of the shell, wherein if the ligand comprises sulfonate, then the sulfonate is selected from the group consisting of trifluoromethanesulfonate (triflate), fluoromethanesulfonate, methanesulfonate (mesylate), nitrophenylsulfonate (nosylate), trifluorethylsulfonate, phenylsulfonate (besylate), and toluenesulfonate (tosylate).