| Autor: |
Jamula LL; Department of Chemistry, Michigan State University , 578 South Shaw Lane, East Lansing, Michigan 48824, United States., Brown AM, Guo D, McCusker JK |
| Jazyk: |
angličtina |
| Zdroj: |
Inorganic chemistry [Inorg Chem] 2014 Jan 06; Vol. 53 (1), pp. 15-7. Date of Electronic Publication: 2013 Dec 17. |
| DOI: |
10.1021/ic402407k |
| Abstrakt: |
Electronic structure theory predicts that, depending on the strength of the ligand field, either the quintet ((5)T2) or triplet ((3)T1) term states can be stabilized as the lowest-energy ligand-field excited state of low-spin octahedral d(6) transition-metal complexes. The (3)T1 state is anticipated for second- and third-row metal complexes and has been established for certain first-row compounds such as [Co(CN)6](3-), but in the case of the widely studied Fe(II) ion, only the (5)T2 state has ever been documented. Herein we report that 2,6-bis(2-carboxypyridyl)pyridine (dcpp), when bound to Fe(II), presents a sufficiently strong ligand field to Fe(II) such that the (5)T2/(3)T1 crossing point of the d(6) configuration is approached if not exceeded. The electrochemical and photophysical properties of [Fe(dcpp)2](2+), in addition to being of fundamental interest, may also have important implications for solar energy conversion strategies that seek to utilize earth-abundant components. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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