Home > Publications database > Spatially Resolved In Situ X-ray Absorption Spectroscopy Studies of ZnS Nanoparticle Synthesis at the Water–Toluene Interface > print |
001 | 636202 | ||
005 | 20250817054533.0 | ||
024 | 7 | _ | |a 10.1021/acsnano.5c02875 |2 doi |
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100 | 1 | _ | |a Klemeyer, Lars |0 P:(DE-H253)PIP1083268 |b 0 |u desy |
245 | _ | _ | |a Spatially Resolved In Situ X-ray Absorption Spectroscopy Studies of ZnS Nanoparticle Synthesis at the Water–Toluene Interface |
260 | _ | _ | |a Washington, DC |c 2025 |b Soc. |
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520 | _ | _ | |a Two-phase synthesis is a well-established approach for achieving precise control of the nanoparticle properties. However, studying and understanding chemical transformations in such a spatially heterogeneous system is challenging. In this work, we introduce a two-phase synthesis route for ZnS nanoparticles (ZnS NPs) at the water–toluene interface. By employing spatially resolved in situ high-energy resolution fluorescence-detected X-ray absorption spectroscopy (HERFD-XAS) combined with density functional theory (DFT) calculations, we track the diffusion of Zn$^{2+}$ species at the interface, identify key reaction intermediates, and monitor the nucleation and growth of ZnS NPs within the toluene phase. We propose the formation of a [Zn(H$_2$O)$_6$]$^{2+}$ complex upon dissolving Zn(Ac)$_2$ in water and the diffusion of Zn$^{2+}$ ions from water to toluene driven by the formation of an octahedral [Zn(OA)$_6$]$^{2+}$ complex (OA = oleylamine). Furthermore, by complementing HERFD-XAS with total X-ray scattering analysis, we show the formation of an intermediate tetrahedral [Zn(SR)4]$^{2+}$ complex at 60 °C and its successive transformation to noncrystalline ZnS nuclei at 80 °C and crystalline ZnS NPs starting at 100 °C. Thus, we demonstrate how in situ X-ray spectroscopy can elucidate the coordination and diffusion of Zn$^{2+}$ ions, and, in combination with X-ray scattering studies, identify the emergence of atomic and electronic structures during the two-phase synthesis of ZnS nanoparticles. |
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773 | _ | _ | |a 10.1021/acsnano.5c02875 |g Vol. 19, no. 28, p. 25710 - 25719 |0 PERI:(DE-600)2383064-5 |n 28 |p 25710 - 25719 |t ACS nano |v 19 |y 2025 |x 1936-0851 |
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