Direct transformation into silver nanoparticles via thermal decomposition of oxalate-bridging silver oleylamine complexes.
Silver(I) oxalate, Ag2(C2O4), reacts with two equivalents of oleylamine (Ag:oleylamine = 1:1 mole/mole) to form an oxalate-bridged silver-oleylamine complex, [(oleylamine)Ag(micro-C2O4)Ag(oleylamine)]. The precursor complex is thermally decomposed at approximately 150 degrees C with CO2 evolution to produce Ag nanoparticles with approximately 11 nm dimension. The Ag nanoparticles contain approximately 12 wt% of oleylamines as the surface stabilizer. In the synthetic mechanism, the oxalate ligand acts as a two-electron reducing agent. The precursor complex is directly transformed into oleylamine-stabilized Ag nanoparticles in high yields of more than 80% without any additional synthetic organic solvents and reducing agents.
Itoh
Mitsunori
M
Department of Material and Biological Chemistry, Faculty of Science, Yamagata University, 1-4-12 Kojirakawa-machi, Yamagata 990-8560, Japan.
Kakuta
Takayoshi
T
Nagaok
Minami
M
Koyama
Yumiko
Y
Sakamoto
Masatomi
M
Kawasaki
Shuji
S
Umeda
Naoki
N
Kurihara
Masato
M