Monatshefte für Chemie / Chemical Monthly最新文献_第9页

Basic method for water detection in LiPF6-based electrolytes 检测基于 LiPF6 的电解质中水分的基本方法

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-01-24 DOI: 10.1007/s00706-023-03163-3

Antonín Šimek, Tomáš Kazda, Jiří Báňa, Ondřej Čech

引用次数: 0

LiFe0.05Mn1.95O4 as a high-rate cathode material for lithium-ion batteries 作为锂离子电池高倍率正极材料的 LiFe0.05Mn1.95O4

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-01-23 DOI: 10.1007/s00706-023-03161-5

Yurii V. Shmatok, Nataliya I. Globa, Vitalii A. Sirosh, Iryna V. Romanova, Sviatoslav A. Kirillov

引用次数: 0

The effect of solution viscosity on the quality of electroactive nanofibers produced by electrospinning 溶液粘度对电纺法生产的电活性纳米纤维质量的影响

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-01-20 DOI: 10.1007/s00706-023-03156-2

Jan Kočí, Martin Míka Havlík, Václav Procházka, Nikola Klusoňová, Eliška Sedláčková

{"title":"The effect of solution viscosity on the quality of electroactive nanofibers produced by electrospinning","authors":"Jan Kočí, Martin Míka Havlík, Václav Procházka, Nikola Klusoňová, Eliška Sedláčková","doi":"10.1007/s00706-023-03156-2","DOIUrl":"https://doi.org/10.1007/s00706-023-03156-2","url":null,"abstract":"<p>This work describes the modification of organic–inorganic nanofibrous templates for advanced electrotechnical applications and their filling with active particles from various materials, according to their intended use. The organic component of the templates consists of high molecular polyvinylpyrrolidone. The inorganic part is colloidal SiO<sub>2</sub>. The organic–inorganic templates produce by electrospinning can be filled with inorganic particles with diameter below 50 µm (for example, different types of spinels or electroactive nanopowders). The idea is to create a modifiable and flexible material for use as a template for electrodes or a solid electrolyte in a safe solid-state battery. The quality and properties of nanofibers are very important for advanced applications, and therefore, the optimization of the manufacturing process is needed. The most important property is the viscosity of the organic–inorganic solution for electrospinning. The influence of viscosity on the quality of nanofibrous layers was observed even with very subtle differences in viscosity. The age of the precursors and the resulting workability time also plays a significant role.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>","PeriodicalId":19011,"journal":{"name":"Monatshefte für Chemie / Chemical Monthly","volume":"59 3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139509703","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

Simple, sensitive, and cost-effective voltammetric determination of salbutamol at a pencil graphite electrode modified with Nafion and functionalized multi-walled carbon nanotubes 用 Nafion 和功能化多壁碳纳米管修饰的铅笔芯石墨电极测定沙丁胺醇的伏安法简便、灵敏且经济高效

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-01-18 DOI: 10.1007/s00706-023-03155-3

Didem Giray Dilgin, Kader Vural, Serkan Karakaya, Yusuf Dilgin

{"title":"Simple, sensitive, and cost-effective voltammetric determination of salbutamol at a pencil graphite electrode modified with Nafion and functionalized multi-walled carbon nanotubes","authors":"Didem Giray Dilgin, Kader Vural, Serkan Karakaya, Yusuf Dilgin","doi":"10.1007/s00706-023-03155-3","DOIUrl":"https://doi.org/10.1007/s00706-023-03155-3","url":null,"abstract":"<p>This study describes a simple, highly sensitive, and cost-effective electrochemical determination of salbutamol (SBT) at a disposable pencil graphite electrode modified with Nafion/functionalized multi-walled carbon nanotubes composite material (Nf/<i>f-</i>MWCNTs/PGE). The electrochemical response of SBT at this modified electrode was investigated by both differential pulse voltammetry (DPV) and cyclic voltammetry techniques. The voltammetric measurements confirmed that the combination of <i>f-</i>MWCNTs with Nafion shows remarkable electrocatalytic activity on the oxidation of SBT due to a synergistic effect of Nafion via electrostatic interaction and <i>f-</i>MWCNTs via excellent conductivity and large specific surface area. Differential pulse voltammetry results show that the composite electrode gives two linear ranges of 0.10–17.5 µM and 17.5–100 µM with a detection limit (LOD) of 0.027 µM SBT. Moreover, the studies of some potential interferants show that there is no significant interference in the determination of SBT. The proposed procedure was successfully applied to determine SBT in tube- and syrup-type pharmaceutical formulations, animal feed, and beef meat samples, and acceptable results were obtained with high accuracy and precision. Moreover, the proposed sensor displays good intra-day and inter-day precisions for the voltammetric determination of SBT.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>","PeriodicalId":19011,"journal":{"name":"Monatshefte für Chemie / Chemical Monthly","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139497985","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

Influence of carbon structure/porosity on the electrochemical performance in Li–sulfur batteries 碳结构/孔隙率对锂硫电池电化学性能的影响

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-01-17 DOI: 10.1007/s00706-023-03160-6

Barbora Pitňa Lásková, Markéta Zukalová, Monika Vinarčíková, Ladislav Kavan

{"title":"Influence of carbon structure/porosity on the electrochemical performance in Li–sulfur batteries","authors":"Barbora Pitňa Lásková, Markéta Zukalová, Monika Vinarčíková, Ladislav Kavan","doi":"10.1007/s00706-023-03160-6","DOIUrl":"https://doi.org/10.1007/s00706-023-03160-6","url":null,"abstract":"<p>The porous structure of three different, commercially available porous carbonaceous materials is investigated by the <i>α</i><sub>S</sub>-plot method and by the <i>t</i>-plot method. Subsequently, the electrochemical properties of sulfur-free porous carbon electrodes from inspected materials are studied by cyclic voltammetry. The comparison of double-layer capacitances with the corresponding adsorption isotherms of N<sub>2</sub> reveals the role of micropores during the capacitive charging of carbons by Li<sup>+</sup>. The studied carbons are added to the sulfur cathodes and evaluated. The cyclic voltammograms show no contribution of micropores in the carbon structure to the electrochemical processes taking place in the lithium–sulfur coin cell. The highest specific capacity of 816 mAh/g is observed for material with the lowest content of micropores in the structure (14%). The partially mesoporous and partially microporous (65%) sample and the predominantly microporous one (87%), show specific capacities of 664 mAh/g and 560 mAh/g, respectively. The galvanostatic cycling of lithium–sulfur coin cells with carbonaceous additives reveals that the mesopores and macropores in the carbon structure increase the specific charge capacity of the lithium–sulfur batteries and that the micropores improve the cycling stability of these batteries.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":19011,"journal":{"name":"Monatshefte für Chemie / Chemical Monthly","volume":"156 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139484160","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 chiral 2-(N-Boc-azetidin-3-yl)-2-alkylpropanoic acids as novel GABA derivatives 作为新型 GABA 衍生物的手性 2-(N-叔丁氧羰基氮杂环丁烷-3-基)-2-烷基丙酸的合成

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-01-14 DOI: 10.1007/s00706-023-03149-1

{"title":"Synthesis of chiral 2-(N-Boc-azetidin-3-yl)-2-alkylpropanoic acids as novel GABA derivatives","authors":"","doi":"10.1007/s00706-023-03149-1","DOIUrl":"https://doi.org/10.1007/s00706-023-03149-1","url":null,"abstract":"<h3>Abstract</h3> <p>An efficient protocol providing easy access to chiral 2-(<em>N</em>-Boc-azetidin-3-yl)-2-alkylpropanoic acids as novel GABA derivatives is described. In the first stage of the synthesis, alkylated phosphonates and <em>N</em>-Boc-azetidin-3-one were converted to the corresponding <em>N</em>-Boc-azetidine-3-ylidenes via a Horner–Wadsworth–Emmons reaction; these were then subjected to a standard hydrogenation procedure. The subsequent reaction of racemic amino esters with sodium hydroxide in methanol afforded the target racemic <em>N</em>-Boc-amino acids as major products. The optically active enantiomers of 2-(<em>N</em>-Boc-azetidin-3-yl)-2-alkylpropanoic acids were prepared via optical resolution of the racemates using (<em>S</em>)-4-benzyl-2-oxazolidinone as the resolving agent to obtain the diastereomeric pairs. After isolation of the pure diastereomers, they were treated with lithium hydroxide and hydrogen peroxide to give the corresponding enantiomerically pure 2-(<em>N</em>-Boc-azetidin-3-yl)-2-alkylpropanoic acids, respectively. Unambiguous structural assignments were based on <sup>1</sup>H, <sup>13</sup>C, <sup>15</sup>N, and <sup>31</sup>P NMR spectroscopy; HRMS; and single-crystal X-ray diffraction data.</p> <span> <h3>Graphical abstract</h3> <p><span> <span> <img alt=\"\" src=\"https://static-content.springer.com/image/MediaObjects/706_2023_3149_Figa_HTML.png\"/> </span> </span></p> </span>","PeriodicalId":19011,"journal":{"name":"Monatshefte für Chemie / Chemical Monthly","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139460291","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

Recent advances on palladium incorporated clay-based heterogeneous catalyst for carbon–carbon coupling reactions 用于碳-碳偶联反应的掺钯粘土基异质催化剂的最新研究进展

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-01-12 DOI: 10.1007/s00706-023-03148-2

Periasamy Vinoth Kumar, Selvaraj Mohana Roopan, Gunabalan Madhumitha

{"title":"Recent advances on palladium incorporated clay-based heterogeneous catalyst for carbon–carbon coupling reactions","authors":"Periasamy Vinoth Kumar, Selvaraj Mohana Roopan, Gunabalan Madhumitha","doi":"10.1007/s00706-023-03148-2","DOIUrl":"https://doi.org/10.1007/s00706-023-03148-2","url":null,"abstract":"<p>In recent years, heterogeneous catalysts have been developed due to their inherent activity, easily recoverable and reusable nature, and eco-friendly nature. The palladium nanoparticles have excellent catalytic activity due to their outstanding performance as catalysts for various chemical reactions. Palladium nanoparticle-incorporated clay-supported heterogeneous composites have been developed recently and possess excellent activity as catalysts for various organic transformations. Palladium nanoparticle-supported clay materials have a high surface area, porosity, ion exchangeability, and binding nature. Due to these criteria, clay-palladium composites act as better catalysts. This review has tried to accentuate the potential advantages of the clay-based heterogeneous catalyst in various carbon–carbon coupling reactions. This review detailed the clay-supported palladium nanoparticles used as catalysts for the construction of C–C moieties, like Suzuki–Miyaura cross-coupling, Sonogashira coupling, Ullmann coupling, and Heck coupling reactions. The advantages and merits of clay-supported palladium catalysts compared with normal conventional methods are easily recovered and reused, reduced palladium metal leaching, and reduced byproduct formation.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>","PeriodicalId":19011,"journal":{"name":"Monatshefte für Chemie / Chemical Monthly","volume":"92 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139460215","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

A short review of the effect of external pressure on the batteries 外部压力对电池影响的简要回顾

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-01-12 DOI: 10.1007/s00706-023-03162-4

Martin Šedina, Antonín Šimek, Jiří Báňa, Tomáš Kazda

引用次数: 0

Utilization of anthracite as electroactive material in sodium-ion batteries 利用无烟煤作为钠离子电池的电活性材料

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-01-11 DOI: 10.1007/s00706-023-03157-1

Antonín Šimek, Tomáš Kazda, Martin Šedina, Ondřej Čech

引用次数: 0

Vapour pressure measurements on Nd–Te system 钕碲系统的蒸汽压力测量结果

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-01-10 DOI: 10.1007/s00706-023-03153-5

S. Shyam Kumar, Arun Kumar Panda, R. Mythili, Rajesh Ganesan

引用次数: 0