Berlin 2008 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 18: Poster: Towards Molecular Spintronics, Organic Thin Films, Optical Layers, Vibrational Spectroscopy, Tayloring organic interfaces
DS 18.10: Poster
Dienstag, 26. Februar 2008, 14:30–19:30, Poster A
Optimization of spin coated thin films based on transition metal complexes towards magneto-optical applications — •Björn Bräuer1, Tobias Rüffer2, Robert Mothes2, François Eya'ane Meva2, and Georgeta Salvan2 — 1Chemnitz University of Technology, Department of Physics, Reichenhainer Straße 70, D-09126 Chemnitz — 2Chemnitz University of Technology, Department of Chemistry, Straße der Nationen 62, D-09111 Chemnitz
Coordination complexes allow the step-wise incorporation of an increasing number of transition metal ions and thereby the variation of physical properties of the molecules. In this work a series of bis(oxamato) type transition metal complexes containing three Cu(II) ions were synthesized to investigate the influence of their central N,N'-bridge and of their terminal ligands on the magnetic and magneto-optical properties. The latter were investigated by means of magneto-optical Kerr effect (MOKE) spectroscopy. For the MOKE investigations thin films were prepared by means of spin coating (deposition) on Si wafers. This was previously demonstrated for the first time to be a promising technique for the deposition of multinuclear transition metal complexes on surfaces [1]. To improve the quality of the films in terms of homogeneity, a number of parameters had to be optimized: a) the chemical composition of the multinuclear transition metal complexes with respect to their planarity and solubility, b) the rotation speed as well as the solvent in the spin coating process. [1] B. Bräuer, D. R. T. Zahn, T. Rüffer, G. Salvan, Chem Phys Lett, 2006, 432, 1-3, 226.