Treatment of a methanolic solution of metal acetate with bis(1-methylimidazolyl)diselenide, [(MeImSe)2], yields complexes of composition [M(OAc)2(MeImSe)2}] (M = Zn, Cd, or Hg) whereas reactions of [MX2(Me2NCH2CH2NMe2)] (X = Cl or OAc) with sodium 1-methylimidazole-2-selenolate gave selenolate complexes of the general formula [M(MeImSe)2] (M = Zn or Cd). The complexes were characterized by elemental analysis, IR, UV–vis, NMR (1H, 13C, and 77Se) data. The crystal structure of [Cd(OAc)2(MeImSe)2}] was established by single-crystal X-ray diffraction. The cadmium atom adopts a distorted octahedral configuration defined by asymmetrically chelated acetate groups and chelating diselenide ligand. Thermal behavior of adducts was studied by thermogravimetric analysis. Pyrolysis in hexadecylamine/tri-n-octylphosphine oxide gave MSe quantum dots, which were characterized by UV–vis, photoluminescence, XRD, EDAX, SAED, and TEM.
用双(1-甲基
咪唑基)二
硒化物 [(MeImSe)2] 处理
金属
乙酸盐的
甲醇溶液,生成组成为 [M(OAc)2(MeImSe)2}] 的络合物(M = Zn、Cd 或 Hg) ) 而 [MX2(Me2NCH2CH2NMe2)] (X = Cl 或 OAc) 与 1-甲基
咪唑-2-
硒酸钠的反应得到通式 [M(MeImSe)2] (M = Zn 或 Cd) 的
硒酸盐络合物。通过元素分析、IR、UV-vis、NMR(1H、13C 和 77Se)数据对配合物进行了表征。通过单晶X射线衍射确定了[Cd(OAc)2(MeImSe)2}]的晶体结构。
镉原子采用由不对称螯合
乙酸基团和螯合二
硒配体定义的扭曲八面体构型。通过热重分析研究了加合物的热行为。在
十六胺/
三正辛基氧化膦中热解得到 MSe 量子点,并通过 UV-vis、光致发光、XRD、E
DAX、SAED 和
TEM 对其进行了表征。