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Inorganics 2019, 7(2), 22;

Molecularly Engineered Lithium–Chromium Alkoxide for Selective Synthesis of LiCrO2 and Li2CrO4 Nanomaterials

Faculty of Mathematics and Natural Sciences, Institute of Inorganic Chemistry, University of Cologne, Greinstraße 6, D-50939 Cologne, Germany
Author to whom correspondence should be addressed.
Received: 11 January 2019 / Revised: 2 February 2019 / Accepted: 10 February 2019 / Published: 14 February 2019
(This article belongs to the Special Issue Mixed Metal Oxides)
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Achieving control over the phase-selective synthesis of mixed metal oxide materials remains a challenge to the synthetic chemist due to diffusion-driven growth, which necessitates the search for new compounds with pre-existent chemical bonds between the phase-forming elements. We report here a simple solvothermal process to fabricate LiCrO2 and Li2CrO4 nanoparticles from bimetallic single-source precursors, demonstrating the distinctive influence of molecular design and calcination conditions on the resulting nanomaterials. The chemical identity of [Li2Cr(OtBu)4Cl(THF)2] (1) and [LiCr(OtBu)2(PyCH=COCF3)2(THF)2] (2) was unambiguously established in the solid state by single-crystal X-ray diffraction, revealing the formation of a coordination polymeric chain in compound 1, whereas electron paramagnetic resonance spectroscopy (EPR) studies revealed a monomeric structure in solution. TEM analysis of synthesized LiCrO2 nanoparticles showed nearly uniform particles size of approximately 20 nm. The sensitivity of the LiCrO2 phase towards oxidation was investigated by X-ray diffraction, revealing the formation of the stable Li2CrO4 after calcination in air. View Full-Text
Keywords: heterometallic; heteroarylalkenol; precursors; solvothermal; nanoparticles heterometallic; heteroarylalkenol; precursors; solvothermal; nanoparticles

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Ojelere, O.; Graf, D.; Mathur, S. Molecularly Engineered Lithium–Chromium Alkoxide for Selective Synthesis of LiCrO2 and Li2CrO4 Nanomaterials. Inorganics 2019, 7, 22.

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