Poly (N-vinylacetamide) (PNVA) was synthesized by the free radical polymerization and its samarium (III) binary complex was prepared and characterized by means of IR, UV-vis, X-ray photoelectron spectroscopy (XPS) and...Poly (N-vinylacetamide) (PNVA) was synthesized by the free radical polymerization and its samarium (III) binary complex was prepared and characterized by means of IR, UV-vis, X-ray photoelectron spectroscopy (XPS) and fluorescence spectra. The fluorescent intensity of samarium (III) characteristic emission was increased significantly due to efficient energy transfer from polymeric ligand to Sm (III) ion in the complex.展开更多
ZnO nanoparticles with very narrow size distribution were synthesized by coupling homogeneous precipi-tation with microemulsion under pulsed microwave heating. The conditions of preparing ZnO nanoparticles were inves-...ZnO nanoparticles with very narrow size distribution were synthesized by coupling homogeneous precipi-tation with microemulsion under pulsed microwave heating. The conditions of preparing ZnO nanoparticles were inves-tigated. The products were characterized with DTA, TGA, XRD, TEM and UV-Vis. The synthesized ZnO nanopartices had much stronger ultraviolet absorptivity than normal ZnO powders; the average size of products was sensitive to the variation of the power or duration of microwave irradiation.展开更多
文摘Poly (N-vinylacetamide) (PNVA) was synthesized by the free radical polymerization and its samarium (III) binary complex was prepared and characterized by means of IR, UV-vis, X-ray photoelectron spectroscopy (XPS) and fluorescence spectra. The fluorescent intensity of samarium (III) characteristic emission was increased significantly due to efficient energy transfer from polymeric ligand to Sm (III) ion in the complex.
文摘ZnO nanoparticles with very narrow size distribution were synthesized by coupling homogeneous precipi-tation with microemulsion under pulsed microwave heating. The conditions of preparing ZnO nanoparticles were inves-tigated. The products were characterized with DTA, TGA, XRD, TEM and UV-Vis. The synthesized ZnO nanopartices had much stronger ultraviolet absorptivity than normal ZnO powders; the average size of products was sensitive to the variation of the power or duration of microwave irradiation.
