Department of Physics, North Carolina State University, Raleigh, N.C. 27695, USA.
Chem Commun (Camb). 2013 Nov 18;49(89):10446-52. doi: 10.1039/c3cc44904a.
The growth of films of [H2B(pz)2]Fe(ii)(bpy) on Au(111) is characterized from the bilayer film to multilayer film regime. Scanning tunneling microscopy shows a transition from a well-ordered, uniform bilayer film to a poorly-ordered film at larger thicknesses. Previous local tunneling spectroscopy and conductance mapping in bilayer films permit the identification of coexisting molecular spin-states at all temperatures. New ultraviolet photoelectron spectroscopy is consistent with this picture and in agreement with the density of states calculated by density functional theory. In thicker films with a polycrystalline morphology, evidence for a more bulk-like change in spin composition as a function of temperature is obtained by observing the reduction in intensity of Fe 2p core level satellites in X-ray photoelectron spectra.
[H2B(pz)2]Fe(ii)(bpy) 在 Au(111) 上的膜生长从双层膜到多层膜阶段进行了表征。扫描隧道显微镜显示，在更大的厚度下，从有序、均匀的双层膜转变为无序的膜。以前在双层膜中的局部隧道光谱和电导映射允许在所有温度下识别共存的分子自旋态。新的紫外光电子能谱与这一图像一致，并与密度泛函理论计算的态密度一致。在具有多晶形态的较厚薄膜中，通过观察 X 射线光电子能谱中 Fe 2p 芯能级卫星强度的降低，获得了随温度变化自旋组成更类似于体相的变化的证据。
