- Synthesis of zero-valent iron nanoparticles via laser ablation in a formate ionic liquid under atmospheric conditions
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Transition metal nanoparticles (NPs) are promising materials for use as catalysts in many processes, although they are easily oxidized under ambient conditions. In this communication, a novel synthetic method is proposed for producing zero-valent iron (Fe) NPs by laser ablation under atmospheric conditions using the reducing properties of a formate-based ionic liquid solvent. The valence state of Fe was confirmed using X-ray absorption near edge structure (XANES) spectroscopy. The Fe NPs adopt a face centered cubic structure after synthesis, which gradually transforms to a body centered cubic structure after one month. The method can be extended to the synthesis of other transition metal NPs that are easily oxidized.
- Okazoe, Shinya,Yasaka, Yoshiro,Kudo, Masaki,Maeno, Hiroshi,Murakami, Yasukazu,Kimura, Yoshifumi
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- Comparative study of inclusion complexation of tetraalkylphosphonium and ammonium salts with cucurbit[7]uril
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Inclusion complexation of tetraalkylphosphonium salts (PSs) with cucurbit[7]uril (CB[7]) was studied spectrophotometrically using methylene blue as a chemical indicator. Differences in the inclusion behaviour caused by the central ions in PSs and tetraalkylammonium salts (ASs) are described herein. The inclusion complexation constant (K) of PS3 with a C3-alkyl chain is remarkably smaller than those of the other PSs, indicating that PS3 is most suitable for clathrate-hydrate formation in bulk solution. In the AS inclusions, AS4 with a C4-alkyl chain showed the small K value. Furthermore, the K values of PSs with CB[7] were measured under high pressure. The K values of CB[7] increased with increasing external pressure and decreasing solvent polarity. From the high-pressure results, the volume change (ΔVrepel) caused by water molecules released from the CB[7] cavity was evaluated. A volumetric study for the inclusion of PSs with CB[7] indicated that in PS6 and PS8 with long C6 and C8 chains, respectively, one alkyl chain was encapsulated in the CB[7] cavity. In the other PSs with short chains, two alkyl chains could be accommodated in the cavity. Based on the effects of temperature, substituents, and external pressure, differences in the inclusion mechanisms of PSs and ASs for CB[7] are discussed.
- Hagiwara, Seiya,Hanaya, Tadashi,Matsumoto, Yuki,Sueishi, Yoshimi
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- Mercaptopyrimidine anti-corrosive ionic liquid as well as preparation method and application thereof
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The invention discloses mercaptopyrimidine anti-corrosive ionic liquid and discloses the mercaptopyrimidine anti-corrosive ionic liquid, wherein the name of the ionic liquid is [PXXXY][DMMP], and a structural formula of the ionic liquid is follows: the formula is shown in the description, wherein X is carbon number in R1 radical, and Y is carbon number in R2 radical. The invention further discloses a preparation method for the ionic liquid and application of the ionic liquid in a lubricant composition. The ionic liquid has excellent corrosion resistance, and the lubricant composition containing the ionic liquid has good friction performance.
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Paragraph 0053
(2019/01/07)
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- METHOD FOR PRODUCING IONIC LIQUID AND METHOD FOR PRODUCING INTERMEDIATE BODY FOR PRODUCTION OF IONIC LIQUID
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PROBLEM TO BE SOLVED: To provide a method for producing an ionic liquid for synthesizing a desired ionic liquid with high purity, and to provide a method for producing an intermediate body for synthesizing the ionic liquid. SOLUTION: A method for producing an ionic liquid which produces a desired ionic liquid Q+Z- formed from cation Q+ and anion Z- includes: a step of purifying a high-melting point intermediate body Q+Y- that is formed from the cation Q+ and the anion Z- and has such a melting point as to be recrystallized, by recrystallization; and a step of obtaining the ionic liquid Q+Z- directly or indirectly from the purified high-melting point intermediate body Q+Y-. A method for producing a strongly acidic intermediate body and a super-hydrophilic intermediate body includes: a step of obtaining a strongly acidic intermediate body or a super-hydrophilic intermediate body from the purified high-melting point intermediate body Q+Y- by a double decomposition precipitation method or obtaining the strongly acidic intermediate body from the purified high-melting point intermediate body Q+Y- by a double decomposition precipitation method, or a step of obtaining the super-hydrophilic intermediate body from the strongly acidic intermediate body by a neutralization method. SELECTED DRAWING: Figure 1 COPYRIGHT: (C)2018,JPOandINPIT
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Paragraph 0088
(2018/02/22)
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