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Guntlin C, Ochsenbein ST, Wörle M, Erni R, Kravchyk KV, Kovalenko MV. Popcorn-Shaped Fe x O (Wüstite) Nanoparticles from a Single-Source Precursor: Colloidal Synthesis and Magnetic Properties. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2018; 30:1249-1256. [PMID: 29606798 PMCID: PMC5871337 DOI: 10.1021/acs.chemmater.7b04382] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 01/22/2018] [Indexed: 05/29/2023]
Abstract
Colloidal nanoparticles (NPs) with myriads of compositions and morphologies have been synthesized and characterized in recent years. For wüstite Fe x O, however, obtaining phase-pure NPs with homogeneous morphologies have remained challenging. Herein, we report the colloidal synthesis of phase-pure Fe x O (x ≈ 0.94) popcorn-shaped NPs by decomposition of a single-source precursor, [Fe3(μ3-O)(CF3COO)(μ-CF3COO)6(H2O)2]·CF3COOH. The popcorn shape and multigrain structure had been reconstructed using high-angle annular dark-field scanning transmission electron micrograph (HAADF-STEM) tomography. This morphology offers a large surface area and internal channels and prevents further agglomeration and thermal tumbling of the subparticles. [Fe3(μ3-O)(CF3COO)(μ-CF3COO)6(H2O)2]·CF3COOH behaves as an antiferromagnetic triangle whose magnetic frustration is mitigated by the low symmetry of the complex. The popcorn-shaped Fe x O NPs show the typical wüstite antiferromagnetic transition at approximately 200 K, but behave very differently to their bulk counterpart below 200 K. The magnetization curves show a clear, unsymmetrical hysteresis, which arises from a combined effect of the superparamagnetic behavior and exchange bias.
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Affiliation(s)
- Christoph
P. Guntlin
- Laboratory
for Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland
- Laboratory for Thin Films and Photovoltaics and Electron Microscopy
Center, EMPA−Swiss Federal Laboratories
for Materials
Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Stefan T. Ochsenbein
- Laboratory
for Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland
- Laboratory for Thin Films and Photovoltaics and Electron Microscopy
Center, EMPA−Swiss Federal Laboratories
for Materials
Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Michael Wörle
- Laboratory
for Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland
| | - Rolf Erni
- Laboratory for Thin Films and Photovoltaics and Electron Microscopy
Center, EMPA−Swiss Federal Laboratories
for Materials
Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Kostiantyn V. Kravchyk
- Laboratory
for Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland
- Laboratory for Thin Films and Photovoltaics and Electron Microscopy
Center, EMPA−Swiss Federal Laboratories
for Materials
Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Maksym V. Kovalenko
- Laboratory
for Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland
- Laboratory for Thin Films and Photovoltaics and Electron Microscopy
Center, EMPA−Swiss Federal Laboratories
for Materials
Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
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Pian JX, He L, Du GF, Guo H, Dai B. Diastereoselective Synthesis of N-Aryl Tetrahydroquinolines and N-Aryl Indolines by the Tandem Reaction of Arynes. J Org Chem 2014; 79:5820-6. [DOI: 10.1021/jo5003399] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ji-Xin Pian
- School of Chemistry and Chemical
Engineering, Shihezi University, Xinjiang, Uygur Autonomous
Region 832000, China
| | - Lin He
- School of Chemistry and Chemical
Engineering, Shihezi University, Xinjiang, Uygur Autonomous
Region 832000, China
| | - Guang-Fen Du
- School of Chemistry and Chemical
Engineering, Shihezi University, Xinjiang, Uygur Autonomous
Region 832000, China
| | - Hao Guo
- School of Chemistry and Chemical
Engineering, Shihezi University, Xinjiang, Uygur Autonomous
Region 832000, China
| | - Bin Dai
- School of Chemistry and Chemical
Engineering, Shihezi University, Xinjiang, Uygur Autonomous
Region 832000, China
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Zhang M, Wang T, Xiong B, Yan F, Wang X, Ding Y, Song Q. Efficient Synthesis of 2,4-Diarylquinolines via Fe(III) Trifluoroacetate Catalyzed Three-Component Reactions under Solvent-Free Conditions. HETEROCYCLES 2012. [DOI: 10.3987/com-12-12433] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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