ABSTRACT We report the synthesis and crystal structure of ethylphenyl dithiocarbamato silver(I) complex. The compound crystallized as [Ag4(EtphDTC)4] in which four Ag(I) ions and four molecules of ethylphenyl dithiocarbamato ligands constitute the metal cluster in the asymmetric unit. Each ethylphenyl dithiocarbamato ligand in the cluster is bonded to three Ag(I) ions through the sulfur atoms with one sulfur covalently bonded while the other sulfur atoms act as two electrons-three centres within the metal cluster. Each Ag(I) ion is linked to three Ag(I) ions through Ag–Ag metallic bond distance of 2.9115(3) Å and 3.0376(4) Å. The complex was thermolyzed at 120, 180 and 220 °C as single source precursor to prepare silver sulfide nanoparticles. Powder XRD patterns confirmed the as-prepared silver sulfide nanoparticles as acanthite Ag1.93S irrespective of the thermolysis temperature. TEM images of the silver sulfide nanoparticles showed particle of 2.99 nm for AgS1 nanoparticles obtained at 120 °C, 6.71 nm for AgS2 obtained at 180 °C and HRTEM image of AgS3 obtained at 220 °C showed average particle size of 32.90 nm. The results showed that the particle sizes of the as-prepared silver sulfide nanoparticles increases with thermolysis temperature. The as-prepared silver sulfide nanoparticles have spherical shapes irrespective of thermolysis temperature. GRAPHICAL ABSTRACT

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来自二硫代氨基甲酸银（I）络合物的硫化银纳米粒子的结构和光学研究：乙基苯基二硫代氨基甲酸银（I）的分子结构

摘要 我们报告了乙基苯基二硫代氨基甲酸银 (I) 配合物的合成和晶体结构。该化合物结晶为 [Ag4(EtphDTC)4]，其中四个 Ag(I) 离子和四个乙基苯基二硫代氨基甲酸配体分子构成不对称单元中的金属簇。簇中的每个乙基苯基二硫代氨基甲酸根配体通过硫原子与三个 Ag(I) 离子键合，其中一个硫共价键合，而其他硫原子在金属簇内充当两个电子 - 三个中心。每个 Ag(I) 离子通过 2.9115(3) Å 和 3.0376(4) Å 的 Ag-Ag 金属键距与三个 Ag(I) 离子相连。该复合物作为单源前驱体在 120、180 和 220°C 下热解以制备硫化银纳米颗粒。粉末 XRD 图案证实了所制备的硫化银纳米颗粒为棘磷矿 Ag1。93S 与热解温度无关。硫化银纳米颗粒的 TEM 图像显示，在 120 °C 下获得的 AgS1 纳米颗粒为 2.99 nm，在 180 °C 下获得的 AgS2 为 6.71 nm，而在 220 °C 下获得的 AgS3 的 HRTEM 图像显示平均粒径为 32.90 nm。结果表明，所制备的硫化银纳米颗粒的粒径随着热解温度的增加而增加。无论热解温度如何，所制备的硫化银纳米颗粒都具有球形形状。图形概要 结果表明，所制备的硫化银纳米颗粒的粒径随着热解温度的增加而增加。无论热解温度如何，所制备的硫化银纳米颗粒都具有球形形状。图形概要 结果表明，所制备的硫化银纳米颗粒的粒径随着热解温度的增加而增加。无论热解温度如何，所制备的硫化银纳米颗粒都具有球形形状。图形概要