Journal of Fluorine Chemistry最新文献_第3页

Separation of 2,2,2-trifluoroethanol – isopropanol azeotropic mixture by extractive distillation 用萃取蒸馏法分离 2,2,2-三氟乙醇-异丙醇共沸混合物

IF 1.7 4区化学

Journal of Fluorine Chemistry Pub Date : 2024-08-01 DOI: 10.1016/j.jfluchem.2024.110329

Egor V. Lupachev, Andrei V. Polkovnichenko

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Investigation of polymeric organofluorosilicates and organofluorogermanates 研究聚合有机氟硅酸盐和有机氟锗酸盐

IF 1.7 4区化学

Journal of Fluorine Chemistry Pub Date : 2024-08-01 DOI: 10.1016/j.jfluchem.2024.110332

Jan Gnidovec , Gašper Tavčar

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Simultaneous exfoliation/fluorination for the preparation of fluorinated exfoliated graphite with high power densities in primary lithium batteries 在一次锂电池中同时进行剥离/氟化以制备具有高功率密度的氟化剥离石墨

IF 1.7 4区化学

Journal of Fluorine Chemistry Pub Date : 2024-08-01 DOI: 10.1016/j.jfluchem.2024.110333

Marie Colin, Louise Dauga, Hani Farhat, Elodie Petit, Lawrence Frezet, Katia Guérin, Marc Dubois

{"title":"Simultaneous exfoliation/fluorination for the preparation of fluorinated exfoliated graphite with high power densities in primary lithium batteries","authors":"Marie Colin, Louise Dauga, Hani Farhat, Elodie Petit, Lawrence Frezet, Katia Guérin, Marc Dubois","doi":"10.1016/j.jfluchem.2024.110333","DOIUrl":"10.1016/j.jfluchem.2024.110333","url":null,"abstract":"<div>Fluorinated carbons combining accordion-like morphology, high content of (C2F)n phase (43%), and residual non-fluorinated carbons were synthetized by two routes, i.e. fluorination of expanded graphite and simultaneous exfoliation/fluorination of expandable graphite. The latter allows the synthesis in a one-step process to be achieved. Accordion-like morphology allows the accommodation of LiF without detrimental accumulation onto the fluorocarbon sheet edges during the discharge in primary lithium battery. The faradic yield is then close to 100 % up to a discharge rate of 6C. Residual sp2 carbons (sub-fluorination) ensure the electron flux during the electrochemical process and enhance the power density (9828 W.Kg-1). High content of (C2F)n phase results in a flat galvanostatic discharge curve. The combination of those features results in a good compromise between energy and power densities, making fluorinated exfoliated graphite one of the best cathodes for primary lithium batteries.</div>","PeriodicalId":357,"journal":{"name":"Journal of Fluorine Chemistry","volume":"278 ","pages":"Article 110333"},"PeriodicalIF":1.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0022113924000939/pdfft?md5=aa9e2ab708b56d94bd516c4cf72a1725&pid=1-s2.0-S0022113924000939-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142076930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Reaction pathways for the formation of complex fluorides revealed by in situ synchrotron X-ray diffraction 原位同步辐射 X 射线衍射揭示形成复杂氟化物的反应途径

IF 1.7 4区化学

Journal of Fluorine Chemistry Pub Date : 2024-08-01 DOI: 10.1016/j.jfluchem.2024.110334

Yoshiyuki Inaguma , Shintaro Kobayashi , Tetsuhiro Katsumata , Shogo Kawaguchi

{"title":"Reaction pathways for the formation of complex fluorides revealed by in situ synchrotron X-ray diffraction","authors":"Yoshiyuki Inaguma , Shintaro Kobayashi , Tetsuhiro Katsumata , Shogo Kawaguchi","doi":"10.1016/j.jfluchem.2024.110334","DOIUrl":"10.1016/j.jfluchem.2024.110334","url":null,"abstract":"<div>This study investigated the reaction between LiF, Mo metal, and CuF2 as a solid-state fluorine source to form a complex fluoride, tetragonal trirutile (TR)-type Li2MoF6, in an Ni metal tube by in situ synchrotron X-ray diffraction (SXRD) experiments. As a result, two formation pathways of TR-type Li2MoF6 were identified: one involving a reaction among intermediate phases, i.e., MoF3, and an unknown Mo-containing fluoride, and the starting materials, i.e., LiF, Mo, and CuF2, the other involving a direct reaction between LiF, Mo, and CuF2. The combination of in situ SXRD with differential scanning calorimetry (DSC) revealed that the direct reaction was facilitated by the presence of the liquid phase of LiF-CuF2. Further, the first-order phase transition of Li2MoF6 with a great volume change of 21% was found to occur in the vicinity of 520 °C–550 °C reversibly. Finally, this study demonstrated that an in situ SXRD experiment supported by DSC measurement is a powerful tool for revealing the reaction routes and identifying new phases occurring in sample-loaded metal tubes.</div>","PeriodicalId":357,"journal":{"name":"Journal of Fluorine Chemistry","volume":"278 ","pages":"Article 110334"},"PeriodicalIF":1.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142049378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Multigram two-step synthesis of difluoromethyl ethers from aliphatic alcohols and glycols 从脂肪醇和乙二醇中多克两步合成二氟甲基醚

IF 1.7 4区化学

Journal of Fluorine Chemistry Pub Date : 2024-08-01 DOI: 10.1016/j.jfluchem.2024.110330

Kirill I. Petko, Andrey A. Filatov, Yurii L. Yagupolskii

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Synthesis of n-isomers: Native and deuterium-labelled short-chain perfluoroalkane sulfonamide derivatives 正异构体的合成：原生和氘标记短链全氟烷磺酰胺衍生物

IF 1.7 4区化学

Journal of Fluorine Chemistry Pub Date : 2024-08-01 DOI: 10.1016/j.jfluchem.2024.110311

D. Jérémy Liwara , Anton Pavlov , Craig Mckenzie , Jon E. Johansen , Pim E.G. Leonards , Sicco Brandsma , Jacob de Boer , Huiling Liu

{"title":"Synthesis of n-isomers: Native and deuterium-labelled short-chain perfluoroalkane sulfonamide derivatives","authors":"D. Jérémy Liwara , Anton Pavlov , Craig Mckenzie , Jon E. Johansen , Pim E.G. Leonards , Sicco Brandsma , Jacob de Boer , Huiling Liu","doi":"10.1016/j.jfluchem.2024.110311","DOIUrl":"10.1016/j.jfluchem.2024.110311","url":null,"abstract":"<div>Perfluorooctane sulfonamide derivatives have been extensively used by industry for their surfactant properties and as building blocks for other perfluoroalkyl substances (PFAS). Due to their environmental impact and their potential degradation to other harmful PFAS, short-chain sulfonamide derivatives alternatives were introduced. However, these are now also suspected to be present in different environmental matrices and there is a lack of labelled and unlabelled reference standards to perform analyses. To address this gap, 40 native and deuterium labelled short-chain perfluoroalkane sulfonamide derivatives were synthesized, utilizing commercial perfluoroalkane sulfonyl fluoride as starting materials. All products were synthesized and then purified to obtain linear n-isomer reference standards. NMR, GC-FID-MS and LC-MS techniques were used for product identification and purity assessment. Recrystallization method was developed to selectively isolate the n-isomer from the isomer mixtures, thereby providing valuable reference and internal standards for environmental and toxicological investigations.</div>","PeriodicalId":357,"journal":{"name":"Journal of Fluorine Chemistry","volume":"278 ","pages":"Article 110311"},"PeriodicalIF":1.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S002211392400071X/pdfft?md5=51d76f340f399a20d9f7f77432010bf3&pid=1-s2.0-S002211392400071X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141952268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Potassium hexafluorotitanate as a catalytic activator for direct amidation of carboxylic acids 作为羧酸直接酰胺化催化剂的六氟钛酸钾

IF 1.7 4区化学

Journal of Fluorine Chemistry Pub Date : 2024-08-01 DOI: 10.1016/j.jfluchem.2024.110328

Aman G. Singh, P. Veeraraghavan Ramachandran

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Synthesis of hexafluorovaline-containing di- and tripeptides 含六氟戊烷的二肽和三肽的合成

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Journal of Fluorine Chemistry Pub Date : 2024-07-19 DOI: 10.1016/j.jfluchem.2024.110315

Maria Cristina Bellucci , Carola Romani , Monica Sani , Alessandro Volonterio

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Adsorption behavior of HFCO and COF2 gasses on pristine, Al-doped, and N-doped (8, 0) single-wall carbon nanotubes and pristine aluminum nitride nanotube: A first-principles study 原始、掺铝和掺氮（8，0）单壁碳纳米管以及原始氮化铝纳米管对 HFCO 和 COF2 气体的吸附行为：第一原理研究

IF 1.7 4区化学

Journal of Fluorine Chemistry Pub Date : 2024-07-14 DOI: 10.1016/j.jfluchem.2024.110317

Marjan Ghafari , Hossein Mohammadi-Manesh , Forough Kalantari Fotooh

{"title":"Adsorption behavior of HFCO and COF2 gasses on pristine, Al-doped, and N-doped (8, 0) single-wall carbon nanotubes and pristine aluminum nitride nanotube: A first-principles study","authors":"Marjan Ghafari , Hossein Mohammadi-Manesh , Forough Kalantari Fotooh","doi":"10.1016/j.jfluchem.2024.110317","DOIUrl":"10.1016/j.jfluchem.2024.110317","url":null,"abstract":"<div>The detection of organic pollutants in the environment is crucial due to their significant impact on human health. Formyl fluoride (HFCO) and carbonyl fluoride (COF2) are toxic gasses that contribute to stratospheric ozone depletion. To explore a potential sensor material for these compounds, the adsorption properties of HFCO and COF2 on pristine (8, 0) single-walled carbon nanotubes (SWCNTs), aluminum-doped SWCNTs (Al-SWCNTs), nitrogen-doped SWCNTs (N-SWCNTs), and aluminum nitride nanotube (AlNNTs) were investigated using density functional theory (DFT) calculations. Obtained structural and electronic results reveal no significant after HFCO and COF2 adsorption on pristine SWCNT. However, the conductivity and polarizability of Al- SWCNT increases throw HFCO and COF2 adsorption. It was shown that this adsorption strongly depends on molecular orientation toward SWCNT. Structural and electronic findings show that studied molecules undergoes a physical adsorption to N- SWCNT. However, AlNNT was also found to show significant changes in structural and electronic properties after HFCO and COF2 adsorption. This adsorption leads to a significant (nearly 45%) reduction in the HOMO-LUMO gap of AlNNTs. Therefore, it is proposed from this study that Al-SWCNTs and AlNNTs are promising candidates for HFCO and COF2 gas sensors. Moreover, AlNNTs exhibit intrinsic detection capabilities without structural manipulation via doping which makes AlNNTs particularly attractive for sensor applications. Moreover, the capability of AlNNT without manipulating makes this nanotube a good and easy made candidate for these compounds adsorption.</div>","PeriodicalId":357,"journal":{"name":"Journal of Fluorine Chemistry","volume":"278 ","pages":"Article 110317"},"PeriodicalIF":1.7,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141637490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Acidity of saturated (hetero)cyclic α-fluoro carboxylic acids and lipophilicity of their amide derivatives 饱和（杂）环α-氟羧酸的酸度及其酰胺衍生物的亲油性

IF 1.7 4区化学

Journal of Fluorine Chemistry Pub Date : 2024-07-09 DOI: 10.1016/j.jfluchem.2024.110316

Oleksii Pidvyshennyi , Kostiantyn P. Melnykov , Oleksandr Liashuk , Dmytro Lesyk , Yuliia Holota , Petro Borysko , Oleksandr O. Grygorenko

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