Vacuum-Evaporable Spin-Crossover Complexes in Direct Contact with a Solid Surface: Bismuth versus Gold
| Autor: | Lalminthang Kipgen, Holger Naggert, Fabian Nickel, Richard Berndt, Torben Jasper-Toennies, Abhishek Rai, Julian Rudnik, Sascha Ossinger, Wolfgang Kuch, Lucas M. Arruda, Matthias Bernien, Felix Tuczek |
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| Rok vydání: | 2017 |
| Předmět: |
Analytical chemistry
chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Magnetic susceptibility XANES 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Bismuth General Energy Nuclear magnetic resonance chemistry Spin crossover law Physical vapor deposition Physical and Theoretical Chemistry Scanning tunneling microscope Thin film 0210 nano-technology Spectroscopy |
| Zdroj: | The Journal of Physical Chemistry C. 121:1210-1219 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | To investigate the ability for spin-state switching of spin-crossover (SCO) complexes adsorbed to solid substrates, the SCO complex [Fe(H2B(pz)2)2(phenme4)] (pz = pyrazole, phenme4 = 3,4,7,8-tetramethyl-1,10-phenanthroline) is prepared. The new complex is investigated by magnetic susceptibility measurements and Mosbauer spectroscopy in the solid state and by temperature-dependent UV/vis spectroscopy in a thin film deposited by physical vapor deposition (PVD) on quartz glass. Thermal- and light-induced SCO is observed in the bulk and the film on glass. Submonolayers of this complex obtained by PVD are studied by temperature-dependent near-edge X-ray absorption fine structure (NEXAFS) on Au(111) as well as Bi(111) and by scanning tunneling microscopy (STM) on Au(111). NEXAFS shows thermal- and light-induced spin-state switching of the complex on Bi(111), however, with a large temperature-independent high-spin fraction (∼50%). On the other hand, combined evidence from NEXAFS and STM indicates that on Au(111)... |
| Databáze: | OpenAIRE |
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