Preparation of Fe3O4 nanoparticles modified with n-dodecylphosphonic acid via a one-pot nonaqueous process using an oxidation reaction of tetrachloroferrate (III) anions by pyridine-N-oxide

Long‐chain n‐Alkylphosphonic acids, AlkP(O)(OH)2, are synthesized in up to 91 % yield (mostly 40–60 %) by straightforward phosphonylation of alkyl bromides (AlkBr, Alk=C4–C18) with red phosphorus (Pn) in the multiphase KOH/H2O/toluene system in the presence of 2–10 mol % of cetyltrimethylammonium bromide (CTAB), acting as a micellar/phase transfer catalyst and as a generator/transporter of superbasic hydroxide anions, the intermediate potassium phosphinates being in situ oxidized/neutralized by nitric acid. The key steps of the phosphonylation mechanism are the P−P bond cleavage of Pn polymeric molecules by superbasic −OH anions, dissolved in the CTAB micelles, and phase transfer of polyphosphide anions to the organic phase and their alkylation with AlkBr.

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Synthesis of Long‐Chain n‐Alkylphosphonic Acids by Phosphonylation of Alkyl Bromides with Red Phosphorus and Superbase under Micellar/Phase Transfer Catalysis

Kuimov

Малышева

Белогорлова

et al. 2021

Eur J Org Chem

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Development of Chemical Synthesis Methods Based on Fusion of Inorganic and Organic Chemistry for Ceramic Powder Preparation and Surface Modification Methods of Nanoparticles and Nanosheets

Sugahara

2022

J. Jpn. Soc. Powder Powder Metallurgy

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Preparation methods for ceramic powders and surface modification methods of ceramic nanoparticles and nanosheets have been developed by combining knowledges and techniques inorganic chemistry and organic chemistry. Preparation of non-oxide ceramic powers by the use of inorganic and organometallic polymers as preceramic precursors has been developed for aluminum nitride and its composites using cage-type compounds with Al-N backbones. The use of preceramic precursors can also provide amorphous materials, whose use can realize the crystallization of high-pressure phases of metal nitrides under milder conditions. The preparation methods of metal oxide nanoparticles from metal chlorides using oxygen donors have also been developed for TiO 2 and Fe 3 O 4 . In addition, surface modification methods for metal oxide nanomaterials have been developed. It was demonstrated that the use of liquid-liquid biphasic systems was effective for surface modification of metal oxide nanoparticles and nanosheets. Surface modification of metal oxide nanosheets can also be achieved in a biphasic laminar flow in a microchannel. The development of regioselective surface modification of nanosheets using potassium hexaniobate trihydrate has realized the preparation of Janus nanosheets by using its unique structure. These achievements demonstrate the advantages of the combination of the methods of inorganic and organic chemistry for preparation of ceramic powders and their surface modification.

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Preparation of Fe3O4 nanoparticles modified with n-dodecylphosphonic acid via a one-pot nonaqueous process using an oxidation reaction of tetrachloroferrate (III) anions by pyridine-N-oxide

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References 36 publications

Synthesis of Long‐Chain n‐Alkylphosphonic Acids by Phosphonylation of Alkyl Bromides with Red Phosphorus and Superbase under Micellar/Phase Transfer Catalysis

Synthesis of Long‐Chain n‐Alkylphosphonic Acids by Phosphonylation of Alkyl Bromides with Red Phosphorus and Superbase under Micellar/Phase Transfer Catalysis

Development of Chemical Synthesis Methods Based on Fusion of Inorganic and Organic Chemistry for Ceramic Powder Preparation and Surface Modification Methods of Nanoparticles and Nanosheets

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