Details
| Original language | English |
|---|---|
| Pages (from-to) | 1728-1733 |
| Number of pages | 6 |
| Journal | POLYHEDRON |
| Volume | 28 |
| Issue number | 9-10 |
| Publication status | Published - 22 Jun 2009 |
Abstract
The precursor [FeIII(L)Cl (L = N,N′-bis(2′-hydroxy-3′-methyl-benzyliden)-1,7-diamino- 4-azaheptane) is combined with [Mo(CN)8]4- yields a star shaped nona-nuclear cluster, [MoIV{(CN)FeIII(L)}8]Cl4. This Fe8Mo molecule is a high-spin system at room temperature. On cooling to 20 K some of the iron(III) centres in the molybdenum(IV)-star switch to the low-spin state as proven by Mössbauer spectroscopy. This molecule was deposited on TiO2 nanowires by electrostatic interactions between the cluster cations and the surface functionalized titanium oxide nanowire. The synthesis and surface binding of the multistable molecular switch was demonstrated using IR and UV-Vis spectroscopy (high-resolution) transmission electron microscopy ((HR)TEM) and Mössbauer spectroscopy. High- and low-temperature Mössbauer spectra indicate that the spin state transition of the free cluster molecules is preserved after surface binding. The above results emphasize the possibility of fabricating molecule-based low-dimensional structures by using traditional bottom-up approaches based on the electrostatic interaction between the cluster cations and polymer functionalized nanowires. These results can be generalized for the application to both charged and non-charged molecules.
Keywords
- High-spin molecule, Metal cluster, Mo(IV)-Fe(III), Spin-crossover, Surface immobilization, TiO nanowire
ASJC Scopus subject areas
- Chemistry(all)
- Physical and Theoretical Chemistry
- Chemistry(all)
- Inorganic Chemistry
- Materials Science(all)
- Materials Chemistry
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In: POLYHEDRON, Vol. 28, No. 9-10, 22.06.2009, p. 1728-1733.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Synthesis and immobilization of molecular switches onto titaniumdioxide nanowires
AU - Tahir, Muhammad Nawaz
AU - Messerschmidt, Markus
AU - Klein, Michael
AU - Martinez, Victor
AU - Theato, Patrick
AU - Metz, Nadine
AU - Hartmann, Sonngard
AU - Kolb, Ute
AU - Ksenofontov, Vadim
AU - Renz, Franz
AU - Tremel, Wolfgang
N1 - Funding Information: This work was partly funded by the DFG (Re-1627/1-3), the “Fonds der chemischen Industrie”, the University of Mainz (“Forschungsfond”; “Material-Wissenschaftliches Forschungs-Zentrum” = MWFZ), and the Leibniz University of Hannover.
PY - 2009/6/22
Y1 - 2009/6/22
N2 - The precursor [FeIII(L)Cl (L = N,N′-bis(2′-hydroxy-3′-methyl-benzyliden)-1,7-diamino- 4-azaheptane) is combined with [Mo(CN)8]4- yields a star shaped nona-nuclear cluster, [MoIV{(CN)FeIII(L)}8]Cl4. This Fe8Mo molecule is a high-spin system at room temperature. On cooling to 20 K some of the iron(III) centres in the molybdenum(IV)-star switch to the low-spin state as proven by Mössbauer spectroscopy. This molecule was deposited on TiO2 nanowires by electrostatic interactions between the cluster cations and the surface functionalized titanium oxide nanowire. The synthesis and surface binding of the multistable molecular switch was demonstrated using IR and UV-Vis spectroscopy (high-resolution) transmission electron microscopy ((HR)TEM) and Mössbauer spectroscopy. High- and low-temperature Mössbauer spectra indicate that the spin state transition of the free cluster molecules is preserved after surface binding. The above results emphasize the possibility of fabricating molecule-based low-dimensional structures by using traditional bottom-up approaches based on the electrostatic interaction between the cluster cations and polymer functionalized nanowires. These results can be generalized for the application to both charged and non-charged molecules.
AB - The precursor [FeIII(L)Cl (L = N,N′-bis(2′-hydroxy-3′-methyl-benzyliden)-1,7-diamino- 4-azaheptane) is combined with [Mo(CN)8]4- yields a star shaped nona-nuclear cluster, [MoIV{(CN)FeIII(L)}8]Cl4. This Fe8Mo molecule is a high-spin system at room temperature. On cooling to 20 K some of the iron(III) centres in the molybdenum(IV)-star switch to the low-spin state as proven by Mössbauer spectroscopy. This molecule was deposited on TiO2 nanowires by electrostatic interactions between the cluster cations and the surface functionalized titanium oxide nanowire. The synthesis and surface binding of the multistable molecular switch was demonstrated using IR and UV-Vis spectroscopy (high-resolution) transmission electron microscopy ((HR)TEM) and Mössbauer spectroscopy. High- and low-temperature Mössbauer spectra indicate that the spin state transition of the free cluster molecules is preserved after surface binding. The above results emphasize the possibility of fabricating molecule-based low-dimensional structures by using traditional bottom-up approaches based on the electrostatic interaction between the cluster cations and polymer functionalized nanowires. These results can be generalized for the application to both charged and non-charged molecules.
KW - High-spin molecule
KW - Metal cluster
KW - Mo(IV)-Fe(III)
KW - Spin-crossover
KW - Surface immobilization
KW - TiO nanowire
UR - http://www.scopus.com/inward/record.url?scp=67349242993&partnerID=8YFLogxK
U2 - 10.1016/j.poly.2008.10.071
DO - 10.1016/j.poly.2008.10.071
M3 - Article
AN - SCOPUS:67349242993
VL - 28
SP - 1728
EP - 1733
JO - POLYHEDRON
JF - POLYHEDRON
SN - 0277-5387
IS - 9-10
ER -