Polymer薄膜作为过渡金属配合物极紫外吸收光谱的通用基底
Polymer Thin Films as Universal Substrates for Extreme Ultraviolet Absorption Spectroscopy of Molecular Transition Metal Complexes
摘要：
探索了聚苯乙烯和聚氯乙烯薄膜作为过渡金属配合物分子极紫外光谱的样品载体。通过滑涂制备的聚合物薄膜是平坦、光滑的，并且比氮化硅窗口透射更多的XUV光。分析物可以直接浇铸到聚合物表面上，也可以共沉积在聚合物表面上，给出了8种典型过渡金属配合物（M=Mn，Fe，Co，Ni）的M边X射线吸收近边（XANES）谱（40-90 eV），证明了该方法的通用性。该薄膜是适合于泵浦/探测瞬态吸收光谱，如所示的激发态光谱的Fe（bpy）$_3^{2+}$在两种不同的聚合物支持。
英文摘要：
Polystyrene and polyvinyl chloride thin films are explored as sample supports for extreme ultraviolet (XUV) spectroscopy of molecular transition metal complexes. Thin polymer films prepared by slip-coating are flat, smooth, and transmit much more XUV light than silicon nitride windows. Analytes can be directly cast onto the polymer surface, or codeposited within it. The M-edge x-ray absorption near-edge (XANES) spectra (40-90 eV) of eight archetypal transition metal complexes (M=Mn, Fe, Co, Ni) are presented to demonstrate the versatility of this method. The films are suitable for pump/probe transient absorption spectroscopy, as shown by the excited-state spectra of Fe(bpy)$_3^{2+}$ in two different polymer supports.
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