Details
| Original language | English |
|---|---|
| Pages (from-to) | 259-265 |
| Number of pages | 7 |
| Journal | Hyperfine Interactions |
| Volume | 184 |
| Issue number | 1-3 |
| Publication status | Published - Jun 2008 |
Abstract
The precursors [Fe(III)( N∈-∈R∈-∈L)Cl] ( N∈-∈R∈-∈LH2=N,N'-bis(2'-hydroxy- 5'-methyl-benzyliden)-1,7-diamino-4-R-4-azaheptane, R ∈=∈ H, methyl(Me)) are high-spin (S∈=∈5/2) complexes. The Lewis-acidic precursors are combined with Lewis- Base-bridging-units [M(CN) x ] y∈-∈ (M = Fe(II), Ru(II), Co (III)) to form heptanuclear star-shaped [M{CN-Fe (III)(N∈-∈R∈-∈L)} x ]Cl y molecular switches. The star-shaped compounds are high-spin systems at room temperature. On cooling to 20 K some of the compounds exhibit multistability, i.e. several iron(III) centers within a molecule switch to the low-spin state as shown by Mössbauer spectroscopy.
Keywords
- Fe -Ru, Fe-Co, Fe-Fe, Heptanuclear, High-spin, Multistability, Spin crossover
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy(all)
- Nuclear and High Energy Physics
- Physics and Astronomy(all)
- Condensed Matter Physics
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: Hyperfine Interactions, Vol. 184, No. 1-3, 06.2008, p. 259-265.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Chemical tuning by 5-Methyl and N-Methyl-substitution in heptanuclear complexes effects multistability investigated by mössbauer spectroscopy
AU - Renz, F.
AU - Martinez, V.
AU - Klein, M.
AU - Schott, M.
AU - Hoffmann, T.
AU - Blumers, M.
AU - Fleischer, I.
AU - Klingelhöfer, G.
AU - Boča, R.
AU - Menzel, M.
N1 - Funding Information: Acknowledgements This work was partly funded by the University of Mainz (“Forschungsfond”; MWFZ), the Leibniz University of Hannover, the Slovak grant agencies (VEGA 1/0213/08, APVV 0006-07, COST-0006-06, VVCE-0004-07), and the “Deutsche Forschungsgemeinschaft”(SPP1137 “Molecular Magnetism”, Re-1627/1-3).
PY - 2008/6
Y1 - 2008/6
N2 - The precursors [Fe(III)( N∈-∈R∈-∈L)Cl] ( N∈-∈R∈-∈LH2=N,N'-bis(2'-hydroxy- 5'-methyl-benzyliden)-1,7-diamino-4-R-4-azaheptane, R ∈=∈ H, methyl(Me)) are high-spin (S∈=∈5/2) complexes. The Lewis-acidic precursors are combined with Lewis- Base-bridging-units [M(CN) x ] y∈-∈ (M = Fe(II), Ru(II), Co (III)) to form heptanuclear star-shaped [M{CN-Fe (III)(N∈-∈R∈-∈L)} x ]Cl y molecular switches. The star-shaped compounds are high-spin systems at room temperature. On cooling to 20 K some of the compounds exhibit multistability, i.e. several iron(III) centers within a molecule switch to the low-spin state as shown by Mössbauer spectroscopy.
AB - The precursors [Fe(III)( N∈-∈R∈-∈L)Cl] ( N∈-∈R∈-∈LH2=N,N'-bis(2'-hydroxy- 5'-methyl-benzyliden)-1,7-diamino-4-R-4-azaheptane, R ∈=∈ H, methyl(Me)) are high-spin (S∈=∈5/2) complexes. The Lewis-acidic precursors are combined with Lewis- Base-bridging-units [M(CN) x ] y∈-∈ (M = Fe(II), Ru(II), Co (III)) to form heptanuclear star-shaped [M{CN-Fe (III)(N∈-∈R∈-∈L)} x ]Cl y molecular switches. The star-shaped compounds are high-spin systems at room temperature. On cooling to 20 K some of the compounds exhibit multistability, i.e. several iron(III) centers within a molecule switch to the low-spin state as shown by Mössbauer spectroscopy.
KW - Fe -Ru
KW - Fe-Co
KW - Fe-Fe
KW - Heptanuclear
KW - High-spin
KW - Multistability
KW - Spin crossover
UR - http://www.scopus.com/inward/record.url?scp=67650450716&partnerID=8YFLogxK
U2 - 10.1007/s10751-008-9799-1
DO - 10.1007/s10751-008-9799-1
M3 - Article
AN - SCOPUS:67650450716
VL - 184
SP - 259
EP - 265
JO - Hyperfine Interactions
JF - Hyperfine Interactions
SN - 0304-3843
IS - 1-3
ER -