RSC Mechanochemistry最新文献

Shaken not stirred: procedures in mechanochemical syntheses and how to define them

RSC Mechanochemistry Pub Date : 2025-02-20 DOI: 10.1039/D5MR90005K

James Batteas and Tomislav Friščić

引用次数: 0

Chemodivergent and diastereoselective synthesis of syn- and anti-cyclopentenyl spiroisoxazolones under ball-milling conditions†

RSC Mechanochemistry Pub Date : 2025-01-14 DOI: 10.1039/D4MR00125G

Peng Xu, Ming-Jun Li, Honglin Diao, Ning Shao, Zeng-Yang He, Shi-Zhu Fan, Ze Zhang and Hui Xu

引用次数: 0

Increasing the number of cations in layered double hydroxides via mechanochemically complemented synthesis: the more the merrier, or not?†

RSC Mechanochemistry Pub Date : 2025-01-10 DOI: 10.1039/D4MR00102H

Evgeniy Seliverstov, Maksim Yapryntsev, Evgeniya Tarasenko and Olga Lebedeva

{"title":"Increasing the number of cations in layered double hydroxides via mechanochemically complemented synthesis: the more the merrier, or not?†","authors":"Evgeniy Seliverstov, Maksim Yapryntsev, Evgeniya Tarasenko and Olga Lebedeva","doi":"10.1039/D4MR00102H","DOIUrl":"https://doi.org/10.1039/D4MR00102H","url":null,"abstract":"A series of layered double hydroxides Mg/Al, MgNi/Al, MgNi/AlIn, MgNiCo/AlIn, MgNiCo/AlInSc, and MgNiCo/AlInScTm were obtained via mechanochemically complemented synthesis with subsequent hydrothermal treatment and additional crystallization. All the samples, except for the Mg/Al one, which was similar to the meixnerite structure, were phase pure. The samples were characterized via X-ray diffraction, FTIR spectroscopy, Raman spectroscopy, and transmission electron microscopy. The peroxidase-like activity of the samples was estimated, and the crystal lattice parameters were calculated. Samples with five, six, and seven cations were characterized by X-ray fluorescence, according to which the cation ratios of the samples and the values of configurational entropy were calculated, which allowed them to be classified as high-entropy materials. For the six-cation sample, elemental mapping was additionally performed, which revealed a uniform distribution of elements over the sample area, along with high-temperature X-ray diffraction, which was also carried out for the five-cation sample.","PeriodicalId":101140,"journal":{"name":"RSC Mechanochemistry","volume":" 2","pages":" 307-316"},"PeriodicalIF":0.0,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/mr/d4mr00102h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553684","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

Moving mechanochemistry forward 推动机械化学向前发展

RSC Mechanochemistry Pub Date : 2025-01-07 DOI: 10.1039/D4MR90021A

James Batteas, Kerstin G. Blank, Evelina Colacino, Franziska Emmerling, Tomislav Friščić, James Mack, Jeffrey Moore, Maria Elena Rivas and Wilfred Tysoe

引用次数: 0

Exploring tribochemical transduction pathways for dehydrogenation of molecular hydrides†

RSC Mechanochemistry Pub Date : 2025-01-04 DOI: 10.1039/D4MR00072B

Esmeralda Muñoz-Cortés, Fabrice Leardini, Marcello Conte, Adolfo del Campo, Eduardo Flores, Jose Ramon Ares and Roman Nevshupa

{"title":"Exploring tribochemical transduction pathways for dehydrogenation of molecular hydrides†","authors":"Esmeralda Muñoz-Cortés, Fabrice Leardini, Marcello Conte, Adolfo del Campo, Eduardo Flores, Jose Ramon Ares and Roman Nevshupa","doi":"10.1039/D4MR00072B","DOIUrl":"https://doi.org/10.1039/D4MR00072B","url":null,"abstract":"Recent research has shown that mechanical energy can trigger dehydrogenation (hydrogen release) from metal and complex hydrides at room temperature, offering an alternative to traditional heat-based methods. This study investigates whether the tribochemical approach can also be effective to release hydrogen from molecular hydrides such as ethane 1,2-diamineborane (EDAB). Surprisingly, despite dehydrogenating at a lower temperature than metal and complex hydrides, EDAB exhibited faint hydrogen release under mechanical stress. To understand this behavior, the tribochemical decomposition pathways of EDAB were investigated using operando Mechanically Stimulated Gas Emission Mass Spectrometry in combination with other surface and material characterization techniques. The lack of hydrogen emission from EDAB is attributed to a combination of strong intramolecular bonds (covalent and dative bonds) within the molecule, and weak intermolecular interactions (hydrogen bonds and van der Waals forces) between EDAB molecules.","PeriodicalId":101140,"journal":{"name":"RSC Mechanochemistry","volume":" 2","pages":" 285-296"},"PeriodicalIF":0.0,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/mr/d4mr00072b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553682","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

Direct arylation of gem-difluorostyrenes using in situ mechanochemically generated calcium-based heavy Grignard reagents†

RSC Mechanochemistry Pub Date : 2024-12-25 DOI: 10.1039/D4MR00135D

Xihong Wang, Yamato Fukuzawa, Pan Gao, Julong Jiang, Satoshi Maeda, Koji Kubota and Hajime Ito

引用次数: 0

Synthesis of a thermally stable 2D MOF via neat grinding and annealing of a panel-like triangular ligand with Zn(ii)†

RSC Mechanochemistry Pub Date : 2024-12-20 DOI: 10.1039/D4MR00118D

Stefano Elli, Manfredi Caruso, Alessandro Sacchetti and Javier Martí-Rujas

引用次数: 0

Aza-Michael addition by ball milling†

RSC Mechanochemistry Pub Date : 2024-12-20 DOI: 10.1039/D4MR00133H

Leonarda Vugrin, Alen Bjelopetrović and Ivan Halasz

引用次数: 0

Influence of ball milling parameters on the mechano-chemical conversion of polyolefins† 球磨参数对聚烯烃机械-化学转化的影响。

RSC Mechanochemistry Pub Date : 2024-12-18 DOI: 10.1039/D4MR00098F

Adrian H. Hergesell, Claire L. Seitzinger, Justin Burg, Renate J. Baarslag and Ina Vollmer

{"title":"Influence of ball milling parameters on the mechano-chemical conversion of polyolefins†","authors":"Adrian H. Hergesell, Claire L. Seitzinger, Justin Burg, Renate J. Baarslag and Ina Vollmer","doi":"10.1039/D4MR00098F","DOIUrl":"10.1039/D4MR00098F","url":null,"abstract":"Ball-milling of addition polymers such as polyolefins, polystyrene and polyacrylates can be used for depolymerization to obtain the respective monomers. However, absolute yields are typically low, especially from polyolefins which are notoriously difficult to depolymerize. To increase the viability of ball milling as a recycling technique, the effect of milling parameters on small hydrocarbon and monomer yields has to be understood. Herein, we systematically investigate the influence of sphere material, milling frequency, plastic filling degree, and milling temperature. Heavy spheres and high milling frequencies boost hydrocarbon yields by maximizing mechanical forces and frequency of collisions. While the dose of kinetic energy is commonly used to describe mechano-chemical processes, we found that it does not capture the mechano-chemical depolymerization of polyolefins. Instead, we rationalized the results based on the Zhurkov equation, a model developed for the thermo-mechanical scission of polymers under stress. In addition, low plastic filling degrees allow for high percentage yields, but cause significant wear on the grinding tools, prohibiting sustained milling. Milling below 40 °C is beneficial for brittle chain cleavage and depolymerization. This study provides a new approach to rationalize the influence of individual milling parameters and their interplay and serves as a starting point to derive design principles for larger-scale mechano-chemical depolymerization processes.","PeriodicalId":101140,"journal":{"name":"RSC Mechanochemistry","volume":" 2","pages":" 263-272"},"PeriodicalIF":0.0,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11696860/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142934306","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

The cubic structure of Li3As stabilized by pressure or configurational entropy via the solid solution Li3As–Li2Se†‡

RSC Mechanochemistry Pub Date : 2024-12-18 DOI: 10.1039/D4MR00127C

Martin Schmid, Florian Pielnhofer and Arno Pfitzner

{"title":"The cubic structure of Li3As stabilized by pressure or configurational entropy via the solid solution Li3As–Li2Se†‡","authors":"Martin Schmid, Florian Pielnhofer and Arno Pfitzner","doi":"10.1039/D4MR00127C","DOIUrl":"https://doi.org/10.1039/D4MR00127C","url":null,"abstract":"The hexagonal to cubic phase transition of Li3As was investigated at high pressure and temperature, revealing a cubic high-pressure polymorph in the Li3Bi structure type. This cubic structure type is preserved in the solid solution of Li3As–Li2Se synthesized via mechanochemical ball milling. The solid solutions were investigated via X-ray powder diffraction, showing a linear dependency of the lattice parameter a on the mole fraction of the boundary phases Li3As and Li2Se, according to Vegard's law. Configurational entropy is generated by mixed anion lattice occupation between arsenide and selenide and therefore stabilizes the cubic structure of the solid solution. At elevated temperatures, the solid solution of Li3As–Li2Se reveals an exsolution process by forming the boundary phases Li3As and Li2Se, proving the metastable character of the system. Impedance spectroscopy was used to determine the lithium-ion conductivities in the Li3As–Li2Se system, showing significantly higher conductivity values (∼10−4 to 10−6 S cm−1 at 50 °C) compared to the pure end members Li3As (∼10−7 S cm−1 at 50 °C) and Li2Se (∼10−7 S cm−1 at 175 °C).","PeriodicalId":101140,"journal":{"name":"RSC Mechanochemistry","volume":" 2","pages":" 193-200"},"PeriodicalIF":0.0,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/mr/d4mr00127c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553655","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