TY - JOUR
T1 - Shape-and size-controlled Ag nanoparticles stabilized by in situ generated secondary amines
AU - Ramírez-Meneses, E.
AU - Montiel-Palma, V.
AU - Domínguez-Crespo, M. A.
AU - Izaguirre-López, M. G.
AU - Palacios-Gonzalez, E.
AU - Dorantes-Rosales, H.
N1 - Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/6/14
Y1 - 2015/6/14
N2 - Silver amides such as AgNiPr2 and AgN(SiMe3)2 have been employed successfully as precursors for the yield synthesis of silver nanoparticles under mild conditions of dihydrogen gas reduction (2 atm) in organic media. Transmission electron microscopy (TEM) showed the formation of silver nanoparticles with FCC structure, variously sized from 26 to 35 nm for AgNiPr2 and from 14 to 86 nm for AgN(SiMe3)2, the synthesis could take place in absence of added stabilizers due to the in situ formation of secondary amines from the reaction of dihydrogen gas with the amide ligands of the silver precursor. Indeed, the presence of HNR2 (R = iPr2, N(SiMe3)2) on the surface of the nanoparticle was confirmed by spectroscopic means. Finally, the addition of ethylenediamine as additional capping agent allowed not only the control of the structural characteristics of the resulting Ag nanoparticles (well-dispersed with spherical shape), but that regarding the nanoparticle size as it inhibited overgrowth, limiting it to ca. 25 nm.
AB - Silver amides such as AgNiPr2 and AgN(SiMe3)2 have been employed successfully as precursors for the yield synthesis of silver nanoparticles under mild conditions of dihydrogen gas reduction (2 atm) in organic media. Transmission electron microscopy (TEM) showed the formation of silver nanoparticles with FCC structure, variously sized from 26 to 35 nm for AgNiPr2 and from 14 to 86 nm for AgN(SiMe3)2, the synthesis could take place in absence of added stabilizers due to the in situ formation of secondary amines from the reaction of dihydrogen gas with the amide ligands of the silver precursor. Indeed, the presence of HNR2 (R = iPr2, N(SiMe3)2) on the surface of the nanoparticle was confirmed by spectroscopic means. Finally, the addition of ethylenediamine as additional capping agent allowed not only the control of the structural characteristics of the resulting Ag nanoparticles (well-dispersed with spherical shape), but that regarding the nanoparticle size as it inhibited overgrowth, limiting it to ca. 25 nm.
KW - Ag nanoparticles
KW - Amines
KW - Chemical synthesis
KW - Stabilizers
UR - http://www.scopus.com/inward/record.url?scp=84930925960&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2015.01.035
DO - 10.1016/j.jallcom.2015.01.035
M3 - Artículo
SN - 0925-8388
VL - 643
SP - S51-S61
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
IS - S1
ER -