The synthesis and structural characterization is reported for [Fe(dien)2][FeSe2]2 and [Fe(tren)][FeSe2]2, two new mixed-valence compounds that contain infinite ∞(1)(FeSe2) tetrahedral chains separated by Fe-amine complexes. The inter- and intra-chain magnetic interactions can be controlled by changing the denticity of the amine while preserving the general structural motif.
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http://dx.doi.org/10.1039/c4cc08608b | DOI Listing |
Inorg Chem
February 2024
Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States.
[Fe(en)(tren)][FeSe] ( = ethylenediamine, CHN, = tris(2-aminoethyl)amine, CHN) has been synthesized by a mixed-ligand solvothermal method. Its crystal structure contains heteroleptic [Fe(en)(tren)] complexes with distorted octahedral coordination, incorporated between 1D-FeSe chains composed of edge-sharing FeSe tetrahedra. The twisted octahedral coordination environment of the Fe-amine complex leads to partial dimerization of Fe-Fe distances in the FeSe chains so that the FeSe polyhedra deviate strongly from the regular tetrahedral geometry.
View Article and Find Full Text PDFInorg Chem
June 2021
Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States.
We report the use of the reported Fe-phthalocyanine complex, PcFe (; Pc = 1,4,8,11,15,18,22,25-octaethoxy-phthalocyanine), to generate PcFe-amine complexes , , and . Treatment of or to an excess of the stable aryloxide radical, 2,4,6-tri-butylphenoxyl radical (ArO), under NH resulted in catalytic H atom abstraction (HAA) and C-N coupling to generate the product 4-amino-2,4,6-tri-butylcyclohexa-2,5-dien-1-one () and ArOH. Exposing to an excess of the trityl (CPh) variant, 2,6-di--butyl-4-tritylphenoxyl radical (ArO), under NH did not lead to catalytic ammonia oxidation as previously reported in a related Ru-porphyrin complex.
View Article and Find Full Text PDFJ Environ Sci (China)
March 2018
Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
In order to study the influences of functionalized groups onto the adsorption of tetracycline, we prepared a series of amino and amino-Fe complex mesoporous silica adsorbents with diverse content of amino and Fe groups (named N,N-SBA15 and Fe-N,N-SBA15). The resulting mesoporous silica adsorbents were fully characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectrometer (FTIR) and N adsorption/desorption isotherms. Furthermore, the effects of functionalized groups on the removal of TC were investigated.
View Article and Find Full Text PDFChem Commun (Camb)
March 2015
Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA.
The synthesis and structural characterization is reported for [Fe(dien)2][FeSe2]2 and [Fe(tren)][FeSe2]2, two new mixed-valence compounds that contain infinite ∞(1)(FeSe2) tetrahedral chains separated by Fe-amine complexes. The inter- and intra-chain magnetic interactions can be controlled by changing the denticity of the amine while preserving the general structural motif.
View Article and Find Full Text PDFJ Colloid Interface Sci
February 2014
Division of Materials Science and Chemical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan.
In order to optimize the adsorption of arsenate, we prepared silica based adsorbents by grafting Fe(3+)-coordinated N-(2-aminoethyl)-3-aminopropyltriethoxysilanes (aeaptes) in various Fe:aeaptes ratios (mixing ratios). Two kinds of mesoporous silica (MCM-41 and SBA-15) and fumed silica (Cab-O-sil M7D) were used as substrates. The adsorption of arsenate saturated at As/Fe=1, 2 and 3 on mesoporous silica based adsorbents from with Fe:aeaptes ratios of 1:1, 1:2 and 1:3, respectively.
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