10.1021/la4005856.s001
Lijia Liu
Lijia
Liu
Timothy L. Kelly
Timothy L.
Kelly
Phase Transfer of Triangular Silver Nanoprisms from
Aqueous to Organic Solvent by an Amide Coupling Reaction
American Chemical Society
2013
Triangular Silver Nanoprisms
diphenylamine
phase transfer
dicyclohexylamine
AgNPr
amines
carboxylic acid end
chloroform
aggregation
MHA
amide
2013-06-11 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Phase_Transfer_of_Triangular_Silver_Nanoprisms_from_Aqueous_to_Organic_Solvent_by_an_Amide_Coupling_Reaction/2406910
In this paper, we describe a procedure
for the phase transfer of
silver nanoprisms (AgNPrs) from aqueous solution to chloroform via
an amide coupling reaction. AgNPrs are first modified with 16-mercaptohexadecanoic
acid (MHA), and then primary or secondary amines are attached to the
carboxylic acid end of the MHA ligand through a carbodiimide-mediated
amide coupling step. Secondary amines, such as dicyclohexylamine and
diphenylamine, are found to solubilize the nanoparticles in chloroform,
whereas primary amines (e.g., butylamine and hexadecylamine) do not
result in phase transfer. It is found that the AgNPrs functionalized
with dicyclohexylamine show the highest stability and the least aggregation
after undergoing phase transfer; in contrast, with a less nucleophilic
amine, such as diphenylamine, the amide coupling reaction does not
go to completion and the resultant AgNPrs are less stable and more
prone to aggregation.