Iron(II) spin crossover films on Au(111): scanning probe microscopy and photoelectron spectroscopy

Alex Pronschinske; Robert C. Bruce; Geoff Lewis; Yifeng Chen; Arrigo Calzolari; Marco Buongiorno-Nardelli; David A. Shultz; Wei You; Daniel B. Dougherty

doi:10.1039/C3CC44904A

Iron(ii) spin crossover films on Au(111): scanning probe microscopy and photoelectron spectroscopy†

Alex Pronschinske,^a Robert C. Bruce,^b Geoff Lewis,^c Yifeng Chen,^a Arrigo Calzolari,^de Marco Buongiorno-Nardelli,^e David A. Shultz,^c Wei You^b and Daniel B. Dougherty*^a

Author affiliations

* Corresponding authors

^a Department of Physics, North Carolina State University, Raleigh, N.C. 27695, USA
E-mail: dbdoughe@ncsu.edu

^b Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, N.C., USA

^c Department of Chemistry, North Carolina State University, Raleigh, N.C. 27695, USA

^d CNR-NANO, Instituto Nanoscienze, Centro S3 I-41125, Modena, Italy

^e Department of Physics and Department of Chemistry, University of North Texas, Denton, TX 76203, USA

Abstract

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.

This article is part of the themed collection: Molecular Spintronics

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DOI: https://doi.org/10.1039/C3CC44904A
Article type: Feature Article
Submitted: 01 Jul 2013
Accepted: 12 Sep 2013
First published: 12 Sep 2013

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Chem. Commun., 2013,49, 10446-10452

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Iron(II) spin crossover films on Au(111): scanning probe microscopy and photoelectron spectroscopy

A. Pronschinske, R. C. Bruce, G. Lewis, Y. Chen, A. Calzolari, M. Buongiorno-Nardelli, D. A. Shultz, W. You and D. B. Dougherty, Chem. Commun., 2013, 49, 10446 DOI: 10.1039/C3CC44904A

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Iron(ii) spin crossover films on Au(111): scanning probe microscopy and photoelectron spectroscopy†

Abstract

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Iron(II) spin crossover films on Au(111): scanning probe microscopy and photoelectron spectroscopy

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