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Fragmentation sequences - ion mass spectra series n-alkylhalgenides, α, ω-dihaloalkanes, α, ω-dihaloperfluoroalkanes. Effect of terminal halide mass and chain molecular weight 断裂序列。离子质谱系列n-烷基卤化物，α ω-二卤代烷，α ω-二卤全氟烷烃。末端卤化物质量和链分子量的影响
Fluorine Notes Pub Date : 2022-02-25 DOI: 10.17677/fn20714807.2022.01.03
Nikolay D. Kagramanov
{"title":"Fragmentation sequences - ion mass spectra series n-alkylhalgenides, α, ω-dihaloalkanes, α, ω-dihaloperfluoroalkanes. Effect of terminal halide mass and chain molecular weight","authors":"Nikolay D. Kagramanov","doi":"10.17677/fn20714807.2022.01.03","DOIUrl":"https://doi.org/10.17677/fn20714807.2022.01.03","url":null,"abstract":"","PeriodicalId":12217,"journal":{"name":"Fluorine Notes","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79746132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Fluorinated ethers. Communication 3. Preparation of fluorinated ethers by addition of alcohols to epoxides, interaction of fluoroolefins and alcohols with formaldehyde, transesterification, electrochemical fluorination and a number of other methods. 氟醚。沟通3。在环氧化物中加入醇制备氟化醚、氟烯烃和醇与甲醛的相互作用、酯交换、电化学氟化和许多其他方法。
Fluorine Notes Pub Date : 2022-02-25 DOI: 10.17677/fn20714807.2022.01.01
V. Kornilov
{"title":"Fluorinated ethers. Communication 3. Preparation of fluorinated ethers by addition of alcohols to epoxides, interaction of fluoroolefins and alcohols with formaldehyde, transesterification, electrochemical fluorination and a number of other methods.","authors":"V. Kornilov","doi":"10.17677/fn20714807.2022.01.01","DOIUrl":"https://doi.org/10.17677/fn20714807.2022.01.01","url":null,"abstract":"The following methods of obtaining fluorinated ethers are described in the final part of the review: the addition of alcohols to epoxides, the interaction of fluorinated olefins and alcohols with formaldehyde, transetherification, and electrochemical fluorination. In addition, a brief description of methods for obtaining fluorinated ethers that are not included in the separate chapters is given, namely: free radical addition of fluorine-containing alkenes to ethers, fluorination with elemental fluorine and higher fluorides of metals of variable valence, reactions of alcohols with ketones and carboxylic acids, reactions of perfluorinated nitrosoalkanes with alcohols and interaction of alcohols with 2,4,6-tris-(2,2,2-trifluoroethoxy)-[1,3,5]triazine (TriTFET).","PeriodicalId":12217,"journal":{"name":"Fluorine Notes","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73928655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
C2-Alkylation in a three-component reaction of fluorocarbonyl compounds, pyrrole derivatives and malononitrile in competition with C2-oxyalkylation 氟羰基化合物、吡咯衍生物和丙二腈三组分反应中的c2 -烷基化与c2 -氧烷基化的竞争
Fluorine Notes Pub Date : 2022-02-25 DOI: 10.17677/fn20714807.2022.01.02
N. Chkanikov
{"title":"C2-Alkylation in a three-component reaction of fluorocarbonyl compounds, pyrrole derivatives and malononitrile in competition with C2-oxyalkylation","authors":"N. Chkanikov","doi":"10.17677/fn20714807.2022.01.02","DOIUrl":"https://doi.org/10.17677/fn20714807.2022.01.02","url":null,"abstract":"The C2-alkylation of pyrrole derivatives with 2-(2,2,2-trifluoroethylidene) malononitrile 1, formed in situ from ethyl hemiacetal trifluoroacetaldehyde 2 and malononitrile in the presence of a base, has been carried out. As a result of this three-component reaction, nitriles were obtained derivatives of 4,5,6,7-tetrahydroindole and pyrrole 4a, b, c. A competing reaction is C2-oxyalkylation of the pyrrole ring with hemiacetal 2. It has been shown that the side reaction can be completely suppressed by lowering the reaction temperature to -30∞C. When the ethyl ester of trifluoropyruvic acid 3 reacts with pyrrole derivatives in the presence of malononitrile, the main reaction is the C2-oxyalkylation of the pyrrole ring, rather than its C2-alkylation formed in situ by alkene 10. Nitriles 6 9 were obtained in high yields from pyrrole derivatives and alkene 10. The structure of the compounds was confirmed by 1H, 13C, 19F NMR spectroscopy, mass spectrometry and high-resolution mass spectrometry.","PeriodicalId":12217,"journal":{"name":"Fluorine Notes","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86599967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
DECARBOXYLATION OF 2,3,3,3-TETRAFLUORO-2-IODOPROPIONIC ACID, ITS POTASSIUM SALT AND TRIMETHYLSILYL ESTER 2,3,3,3-四氟-2-碘丙酸及其钾盐和三甲基硅基酯的脱羧
Fluorine Notes Pub Date : 2022-02-25 DOI: 10.17677/fn20714807.2022.01.04
S. Igumnov
{"title":"DECARBOXYLATION OF 2,3,3,3-TETRAFLUORO-2-IODOPROPIONIC ACID, ITS POTASSIUM SALT AND TRIMETHYLSILYL ESTER","authors":"S. Igumnov","doi":"10.17677/fn20714807.2022.01.04","DOIUrl":"https://doi.org/10.17677/fn20714807.2022.01.04","url":null,"abstract":"The preparation of 1,1,1,2-tetrafluoro2-iodoethane by various methods has been studied, it has been shown that the best method is a method in which a solution of acid in dimethylformamide is gradually added to dimethylformamide preheated to 140°C, the mechanism of this reaction with the formation of CF3CFI – anion is proposed.","PeriodicalId":12217,"journal":{"name":"Fluorine Notes","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80991866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
α-Fluoroalkylamines, their properties and application as sources of nucleophilic fluoride ion α-氟烷基胺的性质及其作为亲核氟离子来源的应用
Fluorine Notes Pub Date : 2021-12-23 DOI: 10.17677/fn20714807.2021.06.02
V. Boyko
{"title":"α-Fluoroalkylamines, their properties and application as sources of nucleophilic fluoride ion","authors":"V. Boyko","doi":"10.17677/fn20714807.2021.06.02","DOIUrl":"https://doi.org/10.17677/fn20714807.2021.06.02","url":null,"abstract":"","PeriodicalId":12217,"journal":{"name":"Fluorine Notes","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86301842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis of fluoride NaYF4/Yb/Tm, NaYF4/Yb/Er micro- and nanocrystals and their characterization by uv optical microscopy method 氟化物NaYF4/Yb/Tm、NaYF4/Yb/Er微纳米晶的合成及紫外光学显微镜表征
Fluorine Notes Pub Date : 2021-12-23 DOI: 10.17677/fn20714807.2021.06.04
S. Molchanova
{"title":"Synthesis of fluoride NaYF4/Yb/Tm, NaYF4/Yb/Er micro- and nanocrystals and their characterization by uv optical microscopy method","authors":"S. Molchanova","doi":"10.17677/fn20714807.2021.06.04","DOIUrl":"https://doi.org/10.17677/fn20714807.2021.06.04","url":null,"abstract":"Fluoride NaYF4/Yb/Tm and NaYF4/Yb/Er microand nanocrystals, which are in the cubic (alpha-) and hexagonal (beta-) phase, have been synthesized. The sizes, crystal structure and shape of crystals (phosphors) are characterized by methods of scanning electron microscopy and Xray diffraction, as well as by high-resolution UV optical microscopy and confocal microscopy. The photoluminescence (PL) of individual phosphors and their agglomerates in upconversion was studied using IR laser pumping light with wavelength of 980 nm. It was shown that using UV microscopy with wavelength of 365 nm and confocal microscopy with wavelength of 405 nm, it is possible to determine the size and shape of particles with diameter of 300 nm. These methods occupy an intermediate position between optical microscopy (within visible range) and electron microscopy in terms of spatial resolution and are useful while analyzing of nanophosphors with organic cladding based on oleic acid.","PeriodicalId":12217,"journal":{"name":"Fluorine Notes","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78134922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Refraction of amorphous copolymers of perfluoro-2,2-dimethyl-1,3-dioxole and perfluoropropylvinyl ether within a telecommunication wavelength ranges near 1300 and 1550 nm 全氟-2,2-二甲基-1,3-二恶唑和全氟丙基乙烯醚的无定形共聚物在1300和1550 nm附近的电信波长范围内的折射
Fluorine Notes Pub Date : 2021-12-23 DOI: 10.17677/fn20714807.2021.06.03
E. Polunin
{"title":"Refraction of amorphous copolymers of perfluoro-2,2-dimethyl-1,3-dioxole and perfluoropropylvinyl ether within a telecommunication wavelength ranges near 1300 and 1550 nm","authors":"E. Polunin","doi":"10.17677/fn20714807.2021.06.03","DOIUrl":"https://doi.org/10.17677/fn20714807.2021.06.03","url":null,"abstract":"Amorphous copolymers of perfluoro-2,2-dimethyl-1,3-dioxole and perfluoropropyl vinyl ether were synthesized by ultrahigh pressure method without using of initiators. By applying spectroscopic refractometry method, authors measured the refraction (refractive index n(l) and material dispersion dn(l)/dl, where l is a wavelength of optical copolymers radiation) within a telecommunication wavelength ranges near l = 1300 and 1550 nm. It is shown that it have low values of n(l) and small material dispersion dn(l)/dl. Synthesized copolymers can be used as a cladding of silica fibers for high-speed optical information transmission systems, as well as a cladding of waveguides made of fluorine-containing electro-optical polymers for high-speed light modulators.","PeriodicalId":12217,"journal":{"name":"Fluorine Notes","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73283604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis of lithium (perfluoroalkyl)trihydroaluminates Li[RFAlH3] 全氟烷基三氢铝酸锂Li[RFAlH3]的合成
Fluorine Notes Pub Date : 2021-12-23 DOI: 10.17677/fn20714807.2021.06.01
A. Tyutyunov
{"title":"Synthesis of lithium (perfluoroalkyl)trihydroaluminates Li[RFAlH3]","authors":"A. Tyutyunov","doi":"10.17677/fn20714807.2021.06.01","DOIUrl":"https://doi.org/10.17677/fn20714807.2021.06.01","url":null,"abstract":"","PeriodicalId":12217,"journal":{"name":"Fluorine Notes","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78580789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ionic series in mass spectra of trifluoromethyl-substituted heterocycles and cyclopropanes not containing regular fragment groups 不含规则片段基团的三氟甲基取代杂环和环丙烷质谱中的离子系列
Fluorine Notes Pub Date : 2021-10-24 DOI: 10.17677/fn20714807.2021.05.03
Nikolay D. Kagramanov
{"title":"Ionic series in mass spectra of trifluoromethyl-substituted heterocycles and cyclopropanes not containing regular fragment groups","authors":"Nikolay D. Kagramanov","doi":"10.17677/fn20714807.2021.05.03","DOIUrl":"https://doi.org/10.17677/fn20714807.2021.05.03","url":null,"abstract":"","PeriodicalId":12217,"journal":{"name":"Fluorine Notes","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90063556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fluorinated ethers. Communication 2. Preparation of fluorinated ethers by the reaction of fluorinated alcohols with diazomethane, addition of polyfluoroalkyl iodides to alkenes, intermolecular dehydration, addition of perfluoroalkyl hypohalogenites to alkenes and pyrolysis of derivatives of perfluor 氟醚。沟通2。用氟化醇与重氮甲烷反应制备氟醚、在烯烃上加成多氟烷基碘化物、分子间脱水、在烯烃上加成全氟烷基次卤化物以及全氟衍生物的热解
Fluorine Notes Pub Date : 2021-10-24 DOI: 10.17677/fn20714807.2021.05.04
V. Kornilov
{"title":"Fluorinated ethers. Communication 2. Preparation of fluorinated ethers by the reaction of fluorinated alcohols with diazomethane, addition of polyfluoroalkyl iodides to alkenes, intermolecular dehydration, addition of perfluoroalkyl hypohalogenites to alkenes and pyrolysis of derivatives of perfluor","authors":"V. Kornilov","doi":"10.17677/fn20714807.2021.05.04","DOIUrl":"https://doi.org/10.17677/fn20714807.2021.05.04","url":null,"abstract":"","PeriodicalId":12217,"journal":{"name":"Fluorine Notes","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73044846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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