Monatshefte für Chemie / Chemical Monthly最新文献_第10页

Comparative study of electrochemical performance of symmetric supercapacitors between aqueous electrolyte and polymer exchange membrane 水电解质与聚合物交换膜对称超级电容器电化学性能的比较研究

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-01-10 DOI: 10.1007/s00706-023-03152-6

L. Soserov, B. Mladenova, B. Karamanova, E. Lefterova, A. Arenillas, A. Stoyanova

{"title":"Comparative study of electrochemical performance of symmetric supercapacitors between aqueous electrolyte and polymer exchange membrane","authors":"L. Soserov, B. Mladenova, B. Karamanova, E. Lefterova, A. Arenillas, A. Stoyanova","doi":"10.1007/s00706-023-03152-6","DOIUrl":"https://doi.org/10.1007/s00706-023-03152-6","url":null,"abstract":"The symmetric supercapacitors (SC) are electrochemical capacitors with higher energy density than conventional ones. Both their positive and negative electrodes contain the same type of electrode active material. Carbon xerogels are a kind of carbon material which properties can be designed, structurally and chemically, in order to fit the requirements for their final application. They possess tunable porosity, high purity, and electrical conductivity and are very relevant for their use as active material for electrodes in supercapacitors. In this study, the electrochemical properties of symmetric supercapacitors were compared by using a polymer Aquivion™ electrolyte membrane (as electrolyte and separator) and the common aqueous electrolyte (i.e., 1 M KOH). The membrane was previously exchanged to the K+-form by immersion in 1 M KOH. The electrode active material was an activated carbon xerogel (AX-1500) prepared by polymerization of resorcinol and formaldehyde in a sol–gel microwave-assisted process. Electrochemical tests were carried out by cyclic voltammetry, galvanostatic charge/discharge measurements, impedance analysis, and long-term durability tests. The relationship between the structure and morphology of the carbon xerogel and the nature of the electrolyte was established, which may be relevant for the design of supercapacitors providing high power and energy densities.<h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":19011,"journal":{"name":"Monatshefte für Chemie / Chemical Monthly","volume":"269 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139421536","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 progress in the reduction of benzene derivatives and their industrial applications 苯衍生物还原及其工业应用的最新进展

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-01-10 DOI: 10.1007/s00706-023-03154-4

Mohammad Tahir Aminzai, Nangyallai Azizi, Yahya Nural, Erdal Yabalak

{"title":"Recent progress in the reduction of benzene derivatives and their industrial applications","authors":"Mohammad Tahir Aminzai, Nangyallai Azizi, Yahya Nural, Erdal Yabalak","doi":"10.1007/s00706-023-03154-4","DOIUrl":"https://doi.org/10.1007/s00706-023-03154-4","url":null,"abstract":"Cyclohexane (CHA), cyclohexene (CHE), and 1,4-cyclohexadiene (CHD) derivatives have a wide variety of applications and scope in synthetic and industrial organic chemistry. These cyclic hydrocarbons are found in a variety of natural products, including herbal plants and fruits as basic fragrance components. The extraction and isolation of these essential hydrocarbons are too complex and difficult to pursue. However, the reduction of benzene and its derivatives is an essential and effective approach for producing CHA, CHE, and CHD derivatives. To obtain CHA, CHE, and CHD derivatives, several types of reduction techniques for benzene and its derivatives have been developed over the years, including various forms of catalytic hydrogenation, Benkeser reduction, classic and many modified Birch reductions such as ammonia-free, metal-free photochemical, solvent-free, electrochemical and electride-mediated Birch reduction. In this study, the comparison of chemoselectivity, regioselectivity, reaction conditions, reduction efficiency, and environmentally acceptable approaches of these techniques used for benzene reduction are summarized.<h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":19011,"journal":{"name":"Monatshefte für Chemie / Chemical Monthly","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139421819","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

Modular PV system design and evaluation 模块化光伏系统设计与评估

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-01-09 DOI: 10.1007/s00706-023-03151-7

Jan Fabián, Pavel Šafl

引用次数: 0

FLUENT model for simulating cyclic voltammetry in electrochemistry 模拟电化学循环伏安法的 FLUENT 模型

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-01-09 DOI: 10.1007/s00706-023-03150-8

Petr Vyroubal, Martin Mačák, Tomáš Kazda, Marek Sedlařík

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Fatty and aromatic acids as acyl donors in enzymatic kinetic resolution of phenylethanol and 1-phenylpropan-2-ol 苯乙醇和 1-苯基-2-丙醇酶解动力学中作为酰基供体的脂肪酸和芳香酸

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-01-09 DOI: 10.1007/s00706-023-03147-3

Fatma Zohra Smaine, Mounia Merabet-Khelassi, Saoussen Zeror, Emilie Kolodziej, Martial Toffano, Louisa Aribi-Zouioueche

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Tetrahydropyridinylidene ammonium salts with arylalkyl and diarylalkyl substitution and their antiprotozoal activity 具有芳基烷基和二芳基烷基取代的四氢吡啶亚基铵盐及其抗原虫活性

Monatshefte für Chemie / Chemical Monthly Pub Date : 2023-12-27 DOI: 10.1007/s00706-023-03142-8

引用次数: 0

The synthesis of higher-carbon sugar alcohols via indium-mediated acyloxyallylation as potential phase change materials 通过铟介导的酰氧基烯丙基化合成高碳糖醇作为潜在的相变材料

Monatshefte für Chemie / Chemical Monthly Pub Date : 2023-12-16 DOI: 10.1007/s00706-023-03136-6

Markus Draskovits, Nina Biedermann, Marko D. Mihovilovic, Michael Schnürch, Christian Stanetty

{"title":"The synthesis of higher-carbon sugar alcohols via indium-mediated acyloxyallylation as potential phase change materials","authors":"Markus Draskovits, Nina Biedermann, Marko D. Mihovilovic, Michael Schnürch, Christian Stanetty","doi":"10.1007/s00706-023-03136-6","DOIUrl":"https://doi.org/10.1007/s00706-023-03136-6","url":null,"abstract":"In recent years, sugar alcohols have gained significant attention as organic phase change materials (PCMs) for thermal energy storage due to their comparably high thermal storage densities up to 350 J/g. In a computational study, outstandingly high values of up to ~ 450–500 J/g have been postulated for specific higher-carbon sugar alcohols. These optimized structures feature an even number of carbon atoms in the backbone and a stereochemical configuration in which all hydroxyl groups are in an 1,3-anti-relationship, as found in the natural hexitol d-mannitol. However, these manno-configured higher-carbon sugar alcohols have not been experimentally investigated as PCMs yet and described synthetic routes are elaborate multiple steps syntheses. Therefore, we aimed to synthesize sugar alcohols of the manno-series with a concise synthetic protocol based on the indium-mediated acyloxyallylation (IMA) of aldoses. En route the C2-epimers were easily accessible, namely gluco-configured sugar alcohols, bearing one set of hydroxyl groups in a suboptimal 1,3-syn-realtionship. The synthesized compounds were found to possess thermal properties consistent with the predicted values, and the “perfect” higher-carbon sugar alcohol with eight carbon atoms was found to have indeed an outstanding high latent heat of fusion of ~ 380 J/g with a melting point of 260 °C.<h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":19011,"journal":{"name":"Monatshefte für Chemie / Chemical Monthly","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138689585","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

β-Elimination as major side reaction in periodate-oxidation of cellulosic model mono- and disaccharides 纤维素模型单糖和二糖高碘酸氧化过程中的主要副反应 β-Elimination

Monatshefte für Chemie / Chemical Monthly Pub Date : 2023-12-14 DOI: 10.1007/s00706-023-03146-4

Jumpei Sasaki, Paul Kosma

{"title":"β-Elimination as major side reaction in periodate-oxidation of cellulosic model mono- and disaccharides","authors":"Jumpei Sasaki, Paul Kosma","doi":"10.1007/s00706-023-03146-4","DOIUrl":"https://doi.org/10.1007/s00706-023-03146-4","url":null,"abstract":"To structurally characterize periodate-oxidized cellulosic substrates, methyl 4-O-methyl β-d-glucopyranoside and methyl 4’-O-methyl-cellobioside were subjected to periodate treatment at pH 4.8–5.0. Oxidation of the monosaccharide using two molar equivalents of oxidant produced 3-methoxy-2,5-dihydro-2-furanol as main product. To confirm its structure and mode of formation, 6-O-bisdeuteromethyl 4-O-methyl-β-d-glucopyranoside and methyl 4-O-trisdeuteromethyl-β-d-glucopyranoside were synthesized and oxidized to generate 3-methoxy-5-deutero-2-hydro-2-furanol in the former case and 3-trisdeuteromethoxy-2,5-dihydro-2-furanol in the latter case. Oxidation using one molar equivalent of periodate led to preferential formation of hemialdal products and (E)-4-hydroxy-2-methoxy-2-butenal. The latter product was also formed upon end-wise oxidation of methyl 4’-O-methyl-cellobioside, wherein the reducing unit was released as non-oxidized methyl β-d-glucopyranoside. This data indicate that periodate oxidation of cellulosic model substrates might be accompanied by peeling reactions and formation of β-elimination products even under slightly acidic conditions.<h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>","PeriodicalId":19011,"journal":{"name":"Monatshefte für Chemie / Chemical Monthly","volume":"142 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138632416","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 practical synthesis for the key intermediate of apixaban 阿哌沙班关键中间体的实用综述

Monatshefte für Chemie / Chemical Monthly Pub Date : 2023-12-13 DOI: 10.1007/s00706-023-03143-7

Wenwen Dong, Tengfei Gong, Chaoyang Liu, Jia Lin, Qiang Jia, Changhu Chu

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A new screen-printed carbon sensor decorated gold nanoparticles/kaolinite mineral: electrochemical analysis of propyphenazone and the investigation of ds-DNA interaction 装饰金纳米粒子/高岭石矿物的新型丝网印刷碳传感器：苯丙酮的电化学分析和 ds-DNA 相互作用的研究

Monatshefte für Chemie / Chemical Monthly Pub Date : 2023-12-12 DOI: 10.1007/s00706-023-03144-6

Ceren Yıldız, Dilek Eskiköy Bayraktepe, Zehra Yazan

{"title":"A new screen-printed carbon sensor decorated gold nanoparticles/kaolinite mineral: electrochemical analysis of propyphenazone and the investigation of ds-DNA interaction","authors":"Ceren Yıldız, Dilek Eskiköy Bayraktepe, Zehra Yazan","doi":"10.1007/s00706-023-03144-6","DOIUrl":"https://doi.org/10.1007/s00706-023-03144-6","url":null,"abstract":"This work represents the development of natural kaolinite mineral (Kao)-gold nanoparticles (GNPs) modified screen-printed carbon electrode (SPCE) based on biocompatible electrode material for the electrochemical quantification of propyphenazone and the investigation of the interaction between propyphenazone and ds-DNA. The surface characteristics of the Kao-GNPs/SPCE were examined by cyclic voltammetry, electrochemical impedance spectroscopy, and field-emission scanning electron microscopy with energy dispersive X-ray spectroscopy methods. The effect of Kao and gold compositions, pH, and interferences studied the analytical performance of this sensor. Propyphenazone has an irreversible oxidation signal on the Kao-GNPs/SPCE sensor surface. Based on this oxidation signal, calibration works were carried out using differential pulse voltammetry, and linear working range, LOD, and LOQ were determined. The real sample analysis of propyphenazone was implemented in human serum samples with a recovery value of 99.43%. Binding constant (K) and Gibbs free energy change (ΔG°) relating to the interaction between propyphenazone and ds-DNA were calculated to be 2.14 (± 0.42) × 104 M−1 and − 24.70 kJ mol−1, respectively.<h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":19011,"journal":{"name":"Monatshefte für Chemie / Chemical Monthly","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138575425","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