Abstract
In the course of our investigation aimed at the preparation of anisotropic cluster materials using a combination of oxide and chloride ligands to induce directional bonding preferences in the cluster unit, a series of niobium oxychloride cluster compounds AxNb6Cl12O2 (A = K, x=0.72(2); A=Rb, x=0.736(7); A=Cs, x=0.938(4); A=In, x=0.634(8)) was obtained by solid state synthesis. The cluster framework is based on (Nb6Cl10iO2i)Cl4 aO2a clusters connected via oxide ligands in the a→ direction with two Nb-O linkages between adjacent clusters, which resembles intercluster bonding in Chevrel-Sergent phases, while in the other two directions, the linkages occur through single Cla-a bridges. The framework generates channels where the cations A+ are located. The electronic band structure of the series features a narrow partially occupied band originating from a Nb-Nb bonding state. Magnetic and ESR measurements show the presence of localized unpaired electrons, and resistivity measurements indicate a semiconducting behavior.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 218-228 |
| Number of pages | 11 |
| Journal | Journal of Alloys and Compounds |
| Volume | 338 |
| Issue number | 1-2 SPEC. |
| DOIs | |
| State | Published - May 16 2002 |
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Keywords
- Anisotropic materials
- Band structure
- Clusters
- Crystal structure
- Niobium
- Oxychlorides
ASJC Scopus subject areas
- Metals and Alloys
Cite this
Preparation, structure, and properties of a series of anisotropic oxychloride cluster compounds AxNb6Cl12O2 (A=K, Rb, Cs, or In). / Anokhina, Ekaterina V.; Day, Cynthia S.; Meyer, Hans Jürgen; Ströbele, Markus; Kauzlarich, Susan M.; Kim, Hyungrak; Whangbo, Myung Hwan; Lachgar, Abdessadek.
In: Journal of Alloys and Compounds, Vol. 338, No. 1-2 SPEC., 16.05.2002, p. 218-228.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Preparation, structure, and properties of a series of anisotropic oxychloride cluster compounds AxNb6Cl12O2 (A=K, Rb, Cs, or In)
AU - Anokhina, Ekaterina V.
AU - Day, Cynthia S.
AU - Meyer, Hans Jürgen
AU - Ströbele, Markus
AU - Kauzlarich, Susan M.
AU - Kim, Hyungrak
AU - Whangbo, Myung Hwan
AU - Lachgar, Abdessadek
PY - 2002/5/16
Y1 - 2002/5/16
N2 - In the course of our investigation aimed at the preparation of anisotropic cluster materials using a combination of oxide and chloride ligands to induce directional bonding preferences in the cluster unit, a series of niobium oxychloride cluster compounds AxNb6Cl12O2 (A = K, x=0.72(2); A=Rb, x=0.736(7); A=Cs, x=0.938(4); A=In, x=0.634(8)) was obtained by solid state synthesis. The cluster framework is based on (Nb6Cl10iO2i)Cl4 aO2a clusters connected via oxide ligands in the a→ direction with two Nb-O linkages between adjacent clusters, which resembles intercluster bonding in Chevrel-Sergent phases, while in the other two directions, the linkages occur through single Cla-a bridges. The framework generates channels where the cations A+ are located. The electronic band structure of the series features a narrow partially occupied band originating from a Nb-Nb bonding state. Magnetic and ESR measurements show the presence of localized unpaired electrons, and resistivity measurements indicate a semiconducting behavior.
AB - In the course of our investigation aimed at the preparation of anisotropic cluster materials using a combination of oxide and chloride ligands to induce directional bonding preferences in the cluster unit, a series of niobium oxychloride cluster compounds AxNb6Cl12O2 (A = K, x=0.72(2); A=Rb, x=0.736(7); A=Cs, x=0.938(4); A=In, x=0.634(8)) was obtained by solid state synthesis. The cluster framework is based on (Nb6Cl10iO2i)Cl4 aO2a clusters connected via oxide ligands in the a→ direction with two Nb-O linkages between adjacent clusters, which resembles intercluster bonding in Chevrel-Sergent phases, while in the other two directions, the linkages occur through single Cla-a bridges. The framework generates channels where the cations A+ are located. The electronic band structure of the series features a narrow partially occupied band originating from a Nb-Nb bonding state. Magnetic and ESR measurements show the presence of localized unpaired electrons, and resistivity measurements indicate a semiconducting behavior.
KW - Anisotropic materials
KW - Band structure
KW - Clusters
KW - Crystal structure
KW - Niobium
KW - Oxychlorides
UR - http://www.scopus.com/inward/record.url?scp=0037118164&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037118164&partnerID=8YFLogxK
U2 - 10.1016/S0925-8388(02)00234-7
DO - 10.1016/S0925-8388(02)00234-7
M3 - Article
AN - SCOPUS:0037118164
VL - 338
SP - 218
EP - 228
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
IS - 1-2 SPEC.
ER -