Polar Intermetallics Pr5Co2Ge3 and Pr7Co2Ge4 With Planar Hydrocarbon-Like Metal Clusters
Abstract
Planar hydrocarbon-like metal clusters may foster new insights linking organic molecules with conjugated π-π bonding interactions and inorganic structures in terms of their bonding characteristics. However, such clusters are uncommon in polar intermetallics. Herein, we report two polar intermetallic phases, Pr5Co2Ge3 and Pr7Co2Ge4, both of which feature such planar metal clusters, viz., ethylene-like [Co2Ge4] clusters plus the concatenated forms and polyacene-like [Co2Ge2]n ribbons in Pr5Co2Ge3, and 1,2,4,5-tetramethylbenzene-like [Co4Ge6] cluster in Pr7Co2Ge4. Just as in the related planar organic structures, these metal-metalloid species are dominated by covalent bonding interactions. Both compounds magnetically order at low temperature with net ferromagnetic components: Pr5Co2Ge3 via a series of transitions below 150 K; and Pr7Co2Ge4 via a single ferromagnetic transition at 19 K. Spin-polarized electronic structure calculations for Pr7Co2Ge4 reveal strong spin-orbit coupling within Pr and considerable magnetic contributions from Co atoms. This work suggests that similar structural chemistry can emerge for other rare earth-late transition metal-main group systems.
- Authors:
-
- Ames Lab., Ames, IA (United States)
- Iowa State Univ., Ames, IA (United States)
- Ames Lab., Ames, IA (United States); Univ. of California, Davis, CA (United States)
- Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
- Publication Date:
- Research Org.:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1368045
- Report Number(s):
- IS-J-9333
Journal ID: ISSN 0947-6539
- Grant/Contract Number:
- AC02-07CH11358
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Chemistry - A European Journal
- Additional Journal Information:
- Journal Volume: 23; Journal Issue: 44; Journal ID: ISSN 0947-6539
- Publisher:
- ChemPubSoc Europe
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; polar intermetallic; single crystal; X-ray diffraction; metallorganic cluster; spin-orbit coupling
Citation Formats
Lin, Qisheng, Aguirre, Kaiser, Saunders, Scott M., Hackett, Timothy A., Liu, Yong, Taufour, Valentin, Paudyal, Durga, Budko, Sergey, Canfield, Paul C., and Miller, Gordon J. Polar Intermetallics Pr5Co2Ge3 and Pr7Co2Ge4 With Planar Hydrocarbon-Like Metal Clusters. United States: N. p., 2017.
Web. doi:10.1002/chem.201702798.
Lin, Qisheng, Aguirre, Kaiser, Saunders, Scott M., Hackett, Timothy A., Liu, Yong, Taufour, Valentin, Paudyal, Durga, Budko, Sergey, Canfield, Paul C., & Miller, Gordon J. Polar Intermetallics Pr5Co2Ge3 and Pr7Co2Ge4 With Planar Hydrocarbon-Like Metal Clusters. United States. https://doi.org/10.1002/chem.201702798
Lin, Qisheng, Aguirre, Kaiser, Saunders, Scott M., Hackett, Timothy A., Liu, Yong, Taufour, Valentin, Paudyal, Durga, Budko, Sergey, Canfield, Paul C., and Miller, Gordon J. Mon .
"Polar Intermetallics Pr5Co2Ge3 and Pr7Co2Ge4 With Planar Hydrocarbon-Like Metal Clusters". United States. https://doi.org/10.1002/chem.201702798. https://www.osti.gov/servlets/purl/1368045.
@article{osti_1368045,
title = {Polar Intermetallics Pr5Co2Ge3 and Pr7Co2Ge4 With Planar Hydrocarbon-Like Metal Clusters},
author = {Lin, Qisheng and Aguirre, Kaiser and Saunders, Scott M. and Hackett, Timothy A. and Liu, Yong and Taufour, Valentin and Paudyal, Durga and Budko, Sergey and Canfield, Paul C. and Miller, Gordon J.},
abstractNote = {Planar hydrocarbon-like metal clusters may foster new insights linking organic molecules with conjugated π-π bonding interactions and inorganic structures in terms of their bonding characteristics. However, such clusters are uncommon in polar intermetallics. Herein, we report two polar intermetallic phases, Pr5Co2Ge3 and Pr7Co2Ge4, both of which feature such planar metal clusters, viz., ethylene-like [Co2Ge4] clusters plus the concatenated forms and polyacene-like [Co2Ge2]n ribbons in Pr5Co2Ge3, and 1,2,4,5-tetramethylbenzene-like [Co4Ge6] cluster in Pr7Co2Ge4. Just as in the related planar organic structures, these metal-metalloid species are dominated by covalent bonding interactions. Both compounds magnetically order at low temperature with net ferromagnetic components: Pr5Co2Ge3 via a series of transitions below 150 K; and Pr7Co2Ge4 via a single ferromagnetic transition at 19 K. Spin-polarized electronic structure calculations for Pr7Co2Ge4 reveal strong spin-orbit coupling within Pr and considerable magnetic contributions from Co atoms. This work suggests that similar structural chemistry can emerge for other rare earth-late transition metal-main group systems.},
doi = {10.1002/chem.201702798},
journal = {Chemistry - A European Journal},
number = 44,
volume = 23,
place = {United States},
year = {Mon Jun 19 00:00:00 EDT 2017},
month = {Mon Jun 19 00:00:00 EDT 2017}
}
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