Chemistry methods : new approaches to solving problems in chemistry最新文献_第10页

Cover Picture: (Chem. Methods 11/2022) 封面图片:(化学)方法11/2022)

Chemistry methods : new approaches to solving problems in chemistry Pub Date : 2022-11-02 DOI: 10.1002/cmtd.202200061

引用次数: 0

The Mechanochemical Beckmann Rearrangement over Solid Acids: From the Ball Mill to the Extruder 固体酸的机械化学贝克曼重排:从球磨机到挤出机

Chemistry methods : new approaches to solving problems in chemistry Pub Date : 2022-10-27 DOI: 10.1002/cmtd.202200058

Daniel M. Baier, Tilo Rensch, Desislava Dobreva, Carolina Spula, Stephen Fanenstich, Marisol Rappen, Konrad Bergheim, Dr. Sven Grätz, Prof. Dr. Lars Borchardt

引用次数: 2

Beginner's Guide to Raman Spectroelectrochemistry for Electrocatalysis Study 初级指南拉曼光谱电化学电催化研究

Chemistry methods : new approaches to solving problems in chemistry Pub Date : 2022-10-26 DOI: 10.1002/cmtd.202200042

Dr. Weiran Zheng

引用次数: 5

Multi-Method Characterization of the High-Entropy Spinel Oxide Mn0.2Co0.2Ni0.2Cu0.2Zn0.2Fe2O4: Entropy Evidence, Microstructure, and Magnetic Properties 高熵尖晶石氧化物Mn 0.2 Co 0.2 Ni 0.2 Cu 0.2 Zn 0.2 fe2o的多方法表征:熵证据、微观结构和磁性能

Chemistry methods : new approaches to solving problems in chemistry Pub Date : 2022-10-25 DOI: 10.1002/cmtd.202200043

Svenja Senkale, Dr. Marius Kamp, Dr. Stefan Mangold, Dr. Sylvio Indris, Prof. Dr. Lorenz Kienle, Dr. Reinhard K. Kremer, Prof. Dr. Wolfgang Bensch

{"title":"Multi-Method Characterization of the High-Entropy Spinel Oxide Mn0.2Co0.2Ni0.2Cu0.2Zn0.2Fe2O4: Entropy Evidence, Microstructure, and Magnetic Properties","authors":"Svenja Senkale, Dr. Marius Kamp, Dr. Stefan Mangold, Dr. Sylvio Indris, Prof. Dr. Lorenz Kienle, Dr. Reinhard K. Kremer, Prof. Dr. Wolfgang Bensch","doi":"10.1002/cmtd.202200043","DOIUrl":"10.1002/cmtd.202200043","url":null,"abstract":"The novel spinel Cu0.2Co0.2Mn0.2Ni0.2Zn0.2Fe2O4 comprising six transition metal cations was successfully prepared by a solution-combustion method followed by distinct thermal treatments. The entropic stabilization of this hexa-metallic material is demonstrated using in situ high temperature powder X-ray diffraction (PXRD) and directed removal of some of the constituting elements. Thorough evaluation of the PXRD data yields sizes of coherently scattering domains in the nanometre-range. Transmission electron microscopy based methods support this finding and indicate a homogeneous distribution of the elements in the samples. The combination of 57Fe Mössbauer spectroscopy with X-ray absorption near edge spectroscopy allowed determination of the cation occupancy on the tetrahedral and octahedral sites in the cubic spinel structure. Magnetic studies show long-range magnetic exchange interactions which are of ferri- or ferromagnetic nature with an exceptionally high saturation magnetization in the range of 92–108 emu g−1 at low temperature, but also an anomaly in the hysteresis of a sample calcined at 500 °C.","PeriodicalId":72562,"journal":{"name":"Chemistry methods : new approaches to solving problems in chemistry","volume":"3 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cmtd.202200043","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42934551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cover Picture: An Easy-to-Use Custom-Built Cell for Neutron Powder Diffraction Studies of Rechargeable Batteries (Chem. Methods 10/2022) 封面图片:一个易于使用的定制电池，用于可充电电池的中子粉末衍射研究(化学)。方法10/2022)

Chemistry methods : new approaches to solving problems in chemistry Pub Date : 2022-10-05 DOI: 10.1002/cmtd.202200056

Daniel Risskov Sørensen, Andreas Østergaard Drejer, Michael Heere, Anatoliy Senyshyn, Matthias Frontzek, Thomas Hansen, Christophe Didier, Vanessa K. Peterson, Dorthe Bomholdt Ravnsbæk, Mads Ry Vogel Jørgensen

{"title":"Cover Picture: An Easy-to-Use Custom-Built Cell for Neutron Powder Diffraction Studies of Rechargeable Batteries (Chem. Methods 10/2022)","authors":"Daniel Risskov Sørensen, Andreas Østergaard Drejer, Michael Heere, Anatoliy Senyshyn, Matthias Frontzek, Thomas Hansen, Christophe Didier, Vanessa K. Peterson, Dorthe Bomholdt Ravnsbæk, Mads Ry Vogel Jørgensen","doi":"10.1002/cmtd.202200056","DOIUrl":"10.1002/cmtd.202200056","url":null,"abstract":"The Front Cover shows a battery cell designed for in operando neutron powder diffraction. The picture seeks to illustrate the experiment process where lithium ions are moving into the crystal structure of the battery cathode during discharge. This leads to changes in the crystal structure that are very important to understand for optimizing the battery materials. These structural changes are probed in operando by neutron powder diffraction, and neutrons are especially suited for probing the location of Li-ion compared with similar techniques such as X-ray diffraction. More information can be found in the Research Article by Daniel R. Sørensen et al..\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture>\u0000 </div>\u0000 </figure>\u0000 ","PeriodicalId":72562,"journal":{"name":"Chemistry methods : new approaches to solving problems in chemistry","volume":"2 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/cmtd.202200056","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41953769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Easy-to-Use Custom-Built Cell for Neutron Powder Diffraction Studies of Rechargeable Batteries 用于可充电电池中子粉末衍射研究的易于使用的定制电池

Chemistry methods : new approaches to solving problems in chemistry Pub Date : 2022-10-05 DOI: 10.1002/cmtd.202200055

Daniel Risskov Sørensen, Andreas Østergaard Drejer, Michael Heere, Anatoliy Senyshyn, Matthias Frontzek, Thomas Hansen, Christophe Didier, Vanessa K. Peterson, Dorthe Bomholdt Ravnsbæk, Mads Ry Vogel Jørgensen

{"title":"An Easy-to-Use Custom-Built Cell for Neutron Powder Diffraction Studies of Rechargeable Batteries","authors":"Daniel Risskov Sørensen, Andreas Østergaard Drejer, Michael Heere, Anatoliy Senyshyn, Matthias Frontzek, Thomas Hansen, Christophe Didier, Vanessa K. Peterson, Dorthe Bomholdt Ravnsbæk, Mads Ry Vogel Jørgensen","doi":"10.1002/cmtd.202200055","DOIUrl":"https://doi.org/10.1002/cmtd.202200055","url":null,"abstract":"Invited for this month's cover is the group of Daniel R. Sørensen at the University of Aarhus (Denmark) and at the University of Lund (Sweden). The cover picture shows a battery cell designed for in operando neutron powder diffraction. The picture seeks to illustrate the experiment process where lithium ions are moving into the crystal structure of the battery cathode during discharge. This leads to changes in the crystal structure that are very important to understand for optimizing the battery materials. These structural changes are probed in operando by neutron powder diffraction, and neutrons are especially suited for probing the location of Li-ion compared with similar techniques such as X-ray diffraction. The beauty of using neutrons is also that their penetrating power allows for investigating the battery without the need for windows of any kind. Read the full text of their Research Article at 10.1002/cmtd.202200046.","PeriodicalId":72562,"journal":{"name":"Chemistry methods : new approaches to solving problems in chemistry","volume":"2 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/cmtd.202200055","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91803484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent Developments in Process Digitalisation for Advanced Nanomaterial Syntheses 先进纳米材料合成过程数字化的最新进展

Chemistry methods : new approaches to solving problems in chemistry Pub Date : 2022-09-30 DOI: 10.1002/cmtd.202200031

Diego Iglesias, Dina Haddad, Dr. Victor Sans

{"title":"Recent Developments in Process Digitalisation for Advanced Nanomaterial Syntheses","authors":"Diego Iglesias, Dina Haddad, Dr. Victor Sans","doi":"10.1002/cmtd.202200031","DOIUrl":"10.1002/cmtd.202200031","url":null,"abstract":"Digitalisation and industry 4.0 are set to profoundly change the way chemical and materials discovery and development work. The integration of multiple enabling technologies such as flow synthesis, automation, analytics, and real-time reaction control lead to highly efficient, productive, data-driven discovery and synthetic protocols. For instance, the development of flow chemistry enables the fine control and automation of process parameters such as flow rates, temperature, and pressure, which inherently enhances process efficiency. Flow chemistry presents a more sustainable means of manufacturing in terms of waste minimisation, as it enables the integration of synthetic processes with downstream processing. Furthermore, it allows the integration of analytical techniques to provide in situ process monitoring of large amounts of process and product data. The application of Artificial Intelligence (AI) and/or Machine Learning (ML) techniques allows rapid decision making that can optimise existing processes, and it has also been applied in the discovery of novel materials, synthetic pathways and chemicals. All this is contributing to an effective digitalisation of chemical and material synthetic processes from the laboratory to large-scale industrial deployment.This paper presents recent developments in the effective digitalisation of chemical synthetic processes which integrates continuous flow synthesis, analytics and artificial intelligence technologies. Specifically, this paper illustrates the emerging trend of process digitalisation through the advanced syntheses of materials with catalytic, optical and optoelectronic applications.","PeriodicalId":72562,"journal":{"name":"Chemistry methods : new approaches to solving problems in chemistry","volume":"2 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/cmtd.202200031","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42948989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Scanning Optical Spectroelectrochemistry: Applications in Protein Redox Potential Measurements 扫描光谱电化学：在蛋白质氧化还原电位测量中的应用

Chemistry methods : new approaches to solving problems in chemistry Pub Date : 2022-09-27 DOI: 10.1002/cmtd.202200047

Prof. Paul V. Bernhardt

{"title":"Scanning Optical Spectroelectrochemistry: Applications in Protein Redox Potential Measurements","authors":"Prof. Paul V. Bernhardt","doi":"10.1002/cmtd.202200047","DOIUrl":"10.1002/cmtd.202200047","url":null,"abstract":"The accurate measurement of redox potentials of small molecules is a relatively straightforward task using electrochemical methods such as cyclic voltammetry. However, proteins, in most cases, are not amenable to the same approach due to slow heterogeneous electron transfer and the possibility of denaturing at the electrode surface. This necessitates the use of small molecular weight redox mediators to facilitate electron transfer. This leads to spectroelectrochemical techniques where the applied electrochemical potential is coupled to a spectroscopic signal of the protein. Traditionally this is done at different applied (fixed) potentials akin to an electrochemical titration, but the time required for electrochemical equilibrium to be established, and its consistent application, are major sources of experimental error. Here we have utilised a continuously scanning potential synchronised with time-resolved UV-vis spectroscopy to provide an automated approach that can be used to measure protein redox potentials accurately in an expedient manner. The test cases are the heme proteins cytochrome c and myoglobin. The scope and limitations of the method are discussed.","PeriodicalId":72562,"journal":{"name":"Chemistry methods : new approaches to solving problems in chemistry","volume":"3 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cmtd.202200047","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49593982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

An Easy-to-Use Custom-Built Cell for Neutron Powder Diffraction Studies of Rechargeable Batteries 用于可充电电池中子粉末衍射研究的易于使用的定制电池

Chemistry methods : new approaches to solving problems in chemistry Pub Date : 2022-09-15 DOI: 10.1002/cmtd.202200046

Daniel Risskov Sørensen, Andreas Østergaard Drejer, Michael Heere, Anatoliy Senyshyn, Matthias Frontzek, Thomas Hansen, Christophe Didier, Vanessa K. Peterson, Dorthe Bomholdt Ravnsbæk, Mads Ry Vogel Jørgensen

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引用次数: 0

Cover Picture: In Situ Studies of the Formation of Tungsten and Niobium Oxide Nanoparticles: Towards Automated Analysis of Reaction Pathways from PDF Analysis using the Pearson Correlation Coefficient (Chem. Methods 9/2022) 封面图片:钨和氧化铌纳米颗粒形成的原位研究:使用Pearson相关系数对PDF分析的反应途径进行自动分析。方法9/2022)

Chemistry methods : new approaches to solving problems in chemistry Pub Date : 2022-09-05 DOI: 10.1002/cmtd.202200053

Emil T. S. Kjær, Olivia Aalling-Frederiksen, Dr. Long Yang, Nancy K. Thomas, Dr. Mikkel Juelsholt, Prof. Simon J. L. Billinge, Dr. Kirsten M. Ø. Jensen

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引用次数: 1