Metal nanoparticles MNPs with unusual chemical physical

The synthesis of AgNiPr2 was first reported by Lappert et al. [55] to proceed from the reaction of AgNCO and M′[N(SiMe3)2] (were M′ = Sn, Pb, Yb). As for the present research work, AgNiPr2 and AgN(SiMe3)2 were prepared from either AgCl or AgNO3 (Aldrich) using standard Schlenk and glove box techniques. Although LiNR2 (R = SiMe3) BIBU 1361 commercially available, its fresh preparation (R = iPr) from the corresponding secondary amine (either diisopropilamine or hexamethyldisilazane) and stoichiometric amounts of a titrated n-BuLi (n-BuLi = C4H9Li) in hexanes was preferred. The white precipitate (either LiNiPr2 or LiN(SiMe3)2) was then filtered and dried under vacuum. Subsequently, a suspension of LiNR2 (R = iPr, N(SiMe3)) and one equivalent mol of AgCl in THF were vigorously stirred for 24 h at room temperature in darkness. The solution was filtered off the residue, concentrated to eliminate the remaining LiCl and recrystallized from THF. The general synthesis reaction of AgNR2 precursors is zygomycetes presented in Fig. 1. The resulting compounds were insoluble in most common organic solvents, but gave satisfactory microanalytical data and FT-IR analysis.