Submolekulare Adressierung der Metallzentren in einem [2×2]‐Co^II₄‐Gitterkomplex mittels STM/STS‐Techniken

Abstract

Die kontrollierte Abscheidung von [2×2]‐CoII4‐Gitterkomplexen auf Graphitoberflächen ergab freistehende 0D‐, 1D‐ und 2D‐Molekülanordnungen, die mit Rastertunnelmikroskopie (STM) abgebildet wurden. Mit Rastertunnelspektroskopie (STS)‐Untersuchungen auf Einzelmolekülniveau wurden die Metallzentren innerhalb des Moleküls direkt adressiert (siehe Bild). Die so experimentell ermittelten Positionen der CoII‐Zentren innerhalb des Gittermoleküls stimmen mit den durch DFT‐Methoden errechneten überein.

Spin‐State Patterns in Surface‐Grafted Beads of Iron(II) Complexes

“…We have successfully applied the CITS technique to a range of metal complexes. [20][21][22][23] As we show in the following, we have succeeded in high-resolution topography mapping and simultaneous measurement of the current-voltage characteristics of single complexes of 1 and 2, and clusters of complexes, deposited on highly oriented pyrolytic graphite (HOPG) surfaces.…”

“…[17] The spectroscopy possibilities of STM, such as current-imaging tunneling spectroscopy (CITS), [18] allow us to probe electronic states of the molecules as a function of energy within a few electronvolts (eV) around the Fermi level. [19][20][21][22][23] Generally, CITS measurements provide direct information about the local conductance at these energies. We have successfully applied the CITS technique to a range of metal complexes.…”

Self‐Assembly of Supramolecular Nanostructures: Ordered Arrays of Metal Ions and Carbon Nanotubes

“…In view of the realization of molecular cellular automata (see Chapter 4), two basic results dealing with metal ion arrays of the [2 Â 2]Co family might be of interest: (i) The metal ion arrays can be ordered along step edges of graphite into 1D infinite chains (Fig. 12.5b) [16]. (ii) The step-wise synthesis of a [2 Â 2]Co II 2 Co III 2 metal ion array yields molecular species, which show exactly the diagonally localized electron density distribution required for the internal cell structure of such automata devices (Fig.…”

Self‐Assembly of a Mononuclear [FeIII(L)(EtOH)2] Complex Bearing an n‐Dodecyl Chain on Solid Highly Oriented Pyrolytic Graphite Surfaces

“…[4][5][6][7][8] Generally, CITS measurements provide direct information about the local conductance at these energies and, indeed, we have successfully applied this technique to a range of metal complexes. [5][6][7][8][9] Earlier studies by us showed that ferric wheels derived from poly-alcoholato ligands substituted with octadecyl alkyl side arms form well-ordered arrays upon adsorption on highly oriented pyrolytic graphite (HOPG) surfaces. [10] Long-alkyl-chain-substituted complexes were employed to increase van der Waals interactions between molecules and the substrate to stabilize molecular aggregates on the surface.…”

“…The CITS technique [3] allows an evaluation of the electronic states of the molecules as a function of energy within a few electron volts [eV] of the Fermi level. [4][5][6][7][8] Generally, CITS measurements provide direct information about the local conductance at these energies and, indeed, we have successfully applied this technique to a range of metal complexes. [5][6][7][8][9] Earlier studies by us showed that ferric wheels derived from poly-alcoholato ligands substituted with octadecyl alkyl side arms form well-ordered arrays upon adsorption on highly oriented pyrolytic graphite (HOPG) surfaces.…”