Article
Chemistry, Multidisciplinary
Maria Carta, Leonarda Vugrin, Goran Miletic, Marina Juribasic Kulcsar, Pier Carlo Ricci, Ivan Halasz, Francesco Delogu
Summary: Mechanochemical transformations are commonly induced by mechanical processing in ball mills. This study reveals that even a single ball impact can cause trimerization in the powder of a square planar bis(dibenzoylmethanato)Ni-II coordination compound. Through systematic experiments and analysis using Raman spectroscopy, the transformation in the powder compact is quantitatively mapped, and bulk reaction kinetics are deduced from multiple individual impacts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Crystallography
Silvina Pagola
Summary: Although mechanochemistry has been known since ancient times, it has only recently emerged as a flourishing research field. This review highlights the advantages of mechanochemical reactions in simplifying and greening chemistry, as well as the current weaknesses that need to be addressed for a systematic study of its energetics and chemical mechanisms. The review also discusses recent experimental and computational advances that show promise in advancing our understanding of mechanochemical reactivity and mechanisms.
Article
Chemistry, Physical
Vanessza Judit Kolcsar, Gyorgy Szollosi
Summary: This study focuses on developing a green system for the asymmetric transfer hydrogenation of ketones using chiral Ru catalyst in aqueous media and mechanochemical energy transmission. The scale-up of the system was successful with high yields of optically enriched alcohols. The developed mechanochemical system provides high TOFs up to 168 h(-1), making it a useful guide for the practical synthesis of optically pure chiral secondary alcohols.
Article
Chemistry, Multidisciplinary
Hirogi Yokochi, Robert T. O'Neill, Takumi Abe, Daisuke Aoki, Roman Boulatov, Hideyuki Otsuka
Summary: Sacrificial chemical bonds are effective in increasing the toughness of elastomers. Mechanical bonds, such as rotaxanes or catenanes, have similar effects on the fracture strain, stress, and energy of elastomers as covalent bonds.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Kevin Linberg, Paulina Szymoniak, Andreas Schoenhals, Franziska Emmerling, Adam A. L. Michalchuk
Summary: We demonstrate that mechanochemically driven polymorphic transformations can have significantly long induction periods, which can be adjusted by changing the energy of ball milling. The design and interpretation of ball milling experiments need to consider the unexpected kinetics arising from unique energetic phenomena in the solid state. Through detailed thermal analysis and DFT simulations, we find that these long induction periods are associated with mechanical activation processes. Additionally, we show that pre-activation of reagents can also affect the length of induction periods. This discovery opens up a new dimension for controlling polymorphic transformations in organic crystals, and we expect mechanical activation to have broader implications in organic solid-state mechanochemistry.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Polymer Science
Mengjie Zhou, Yu Zhang, Ge Shi, Yanjie He, Zhe Cui, Xiaomeng Zhang, Peng Fu, Minying Liu, Xiaoguang Qiao, Xinchang Pang
Summary: In this study, a synergistically catalyzed atom transfer radical polymerization (ATRP) induced and controlled by the interplay between ball milling (BM) and piezoelectric nanoparticles (piezoNPs) was demonstrated for sustainable and eco-friendly polymer synthesis. The BM-induced electron transfer was achieved through the deformation of piezoNPs under impact force, acting as an external stimulus to mediate polymerization. The fabrication of a polymer with a well-defined molecular weight and low polydispersity was successfully achieved with ppm level copper loading. High-molecular-weight polymers ranging from 33 to 74 kDa were prepared by DMSO-assisted grinding. Besides, the ATRP approach showed good performance in terms of the availability of water as a liquid-assisted grinding additive, the recyclability of piezoNPs, and the formation of cross-linker-free composite resin, making it a green and practical option alongside existing heat-, electro-, and photo-induced methods.
Review
Chemistry, Multidisciplinary
Adam A. L. Michalchuk, Franziska Emmerling
Summary: Mechanochemical transformations offer environmentally friendly routes for synthesis, increasing reaction speed and selectivity. Time-resolved in situ (TRIS) approaches have provided new insights into mechanochemical reactions, revealing new features and advancing our understanding through the combination of complementary techniques.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Vanessza Judit Kolcsar, Gyorgy Szollosi
Summary: This study optimized the mechanochemical asymmetric transfer hydrogenation of 4-chromanone using a Ru-chitosan complex catalyst and HCOONa as the hydrogen donor in aqueous media, leading to the successful preparation of optically enriched alcohols.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Gao-Feng Han, Peng Zhang, Pascal Scholzen, Hyuk-Jun Noh, Mihyun Yang, Do Hyung Kweon, Jong-Pil Jeon, Young Hyun Kim, Seong-Wook Kim, Sun-Phil Han, Andrey S. Andreev, Guillaume Lang, Kyuwook Ihm, Feng Li, Jean-Baptiste D'Espinose de Lacaillerie, Jong-Beom Baek
Summary: In this study, a mechanochemical method was used to enhance the reaction rate of carbon hydrogasification and improve its selectivity. The findings of this work have the potential to advance research in carbon hydrogasification and other solid-gas reactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Qizhuang Zou, Junji Chen, Yizhou Wang, Jiarui Gu, Fei Liu, Tianxiang Zhao
Summary: The bimetallic mesoporous catalyst Pd0.25Cu0.75/Al2O3 prepared via mechanochemistry showed excellent catalytic activity and selectivity for N-formylation of various aliphatic amines. Despite having the lowest Pd loading, it achieved an unprecedented turnover number of up to 527, suggesting its potential for green and economical synthesis of heterogeneous metal catalysts.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Inorganic & Nuclear
Joseph M. Mwansa, Matthew J. Stirling, Gemma Sweeney, Jiri Hanusek, Jiri Vana, Michael Page
Summary: A novel dimeric iodo-iridium(iii) complex with an amide moiety within the tetramethylcyclopentadiene ring has been synthesized and characterized. The presence of restricted rotation in the 2-substituted isomer leads to the existence of two distinguishable conformers. The relative acidities of Cp*CONMe2 and Cp* have been compared, and the study also focuses on the decrease in enantiomeric excess during the reduction reaction.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Yudi Zhang, Zi Wang, Tatiana B. Kouznetsova, Ye Sha, Enhua Xu, Logan Shannahan, Muge Fermen-Coker, Yangju Lin, Chuanbing Tang, Stephen L. Craig
Summary: Metallocenes are attractive mechanophores due to their stability in the absence of force but reactivity under tension. Covalently bridging the cyclopentadienyl ligands of ferrocenes in a polymer alters their mechanochemical reactivity, leading to faster dissociation through a peeling mechanism. Distal attachments can restrict dissociation mechanism to peeling, increasing dissociation rate constant by several orders of magnitude.
Article
Chemistry, Multidisciplinary
Lori Gonnet, Alain Chamayou, Christiane Andre-Barres, Jean-Claude Micheau, Brigitte Guidetti, Tohru Sato, Michel Baron, Michel Baltas, Rachel Calvet
Summary: The study on the Diels-Alder reaction between diphenylfulvene and maleimide demonstrates that mechanochemistry offers advantages over solution-based methods, showing shorter reaction time, improved reaction completeness, and enhanced selectivity.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Physical
Meijia Li, Tianyu Zhang, Shi-Ze Yang, Yifan Sun, Junyan Zhang, Felipe Polo-Garzon, Kevin M. Siniard, Xinbin Yu, Zili Wu, Darren M. Driscoll, Alexander S. Ivanov, Hao Chen, Zhenzhen Yang, Sheng Dai
Summary: A mechanochemistry-driven approach was used to construct strong metal-support interactions (SMSIs) under neat and ambient conditions, resulting in enhanced catalysis. The encapsulation degree and overlayer structures could be customized, leading to improved hydrogenation activity.
Editorial Material
Chemistry, Multidisciplinary
Ana M. Belenguer, Adam A. L. Michalchuk
Summary: A potentially transformative route for purifying enantiomers using a simple ball milling procedure has been discovered in this study.
Article
Chemistry, Multidisciplinary
Swapneel Thakkar, Lidia De Luca, Silvia Gaspa, Alberto Mariani, Sebastiano Garroni, Antonio Iacomini, Luigi Stagi, Plinio Innocenzi, Luca Malfatti
Summary: Graphene-enhanced Raman scattering (GERS) is a chemical-based enhancement of Raman signal. Graphene nanostructures can be used to build a platform for fast and sensitive detection of pesticides in water. The properties of graphene nanostructures affect GERS performance, with monolayers being more efficient than few-layer structures. Surface functionalization reduces GERS effect.
Article
Food Science & Technology
Ugo Azzena, Massimo Carraro, Luisa Pisano, Elisa Pintus, Salvatore Pintus, Riccardo Polese, Pierpaolo Satta, Silvia Gaspa, Lidia De Luca, Alessandro Taras, Sebastiano Garroni
Summary: This study reinvestigates the one-pot two-steps hydroxylation of fatty acid esters using acidic ion exchange resins as catalysts. The relationship between the structure of different substrates and the efficiency of different resins in promoting the hydrolysis is studied. The drying process and the cross-linking degree of the resins are found to be correlated with their effectiveness in promoting the hydrolysis. The study also successfully applies this hydroxylation procedure to the valorization of waste cooking oil.
EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Valeria Farina, Maria Domenica Simula, Alessandro Taras, Luca Cappai, Moulay Tahar Sougrati, Gabriele Mulas, Sebastiano Garroni, Stefano Enzo, Lorenzo Stievano
Summary: This study investigates the transformation of olivine during the conversion of CO2 to light hydrocarbons, and reveals the role of the redox activity of iron species during the activation process.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Ceramics
Damiano Angioni, Roberto Orru, Giacomo Cao, Sebastiano Garroni, Antonio Iacomini, Devis Bellucci, Valeria Cannillo
Summary: The bioactive glass BGMS10 containing 10 mol.% SrO and 10 mol.% MgO has low crystallization tendency. With the help of SPS, highly dense and fully amorphous products can be obtained at 750 degrees C. The glass begins to crystallize at 850 degrees C, and 95 wt. % crystallized ceramics are produced at 950 degrees C. The main crystalline phases are alpha- and beta-CaSiO3. Crystallization is accompanied by an increase in Young's modulus. Partially crystallized samples have higher Vickers hardness but lower density compared to fully crystallized ones.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Engineering, Environmental
Alberto Mannu, Matteo Poddighe, Sebastiano Garroni, Luca Malfatti
Summary: In this study, FT-IR and UV-VIS spectroscopy were used to develop an analytical tool for distinguishing between edible and waste vegetable oils. Qualitative analysis indicated that FT-IR and UV-VIS were more suitable techniques for distinguishing between waste and edible samples. Statistical multivariate analysis revealed that the FT-IR-based method was more appropriate, despite the undesired distinction between edible oils of the same type. Furthermore, attempts on UV-VIS data obtained in reflection mode successfully differentiated between edible and waste oil samples.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Chemistry, Multidisciplinary
Junkai Ren, Luigi Stagi, Luca Malfatti, Valentina Paolucci, Carlo Cantalini, Sebastiano Garroni, Marzia Mureddu, Plinio Innocenzi
Summary: Researchers have fabricated WS2/TiO2 heterostructures by incorporating two-dimensional transition metal dichalcogenides layers into titania mesoporous ordered thin films, resulting in improved performances of photocatalytic devices. An enhanced photocatalytic response has been observed, attributed to the interparticle electron transfer effect.
Review
Chemistry, Multidisciplinary
Federico Cuccu, Lidia De Luca, Francesco Delogu, Evelina Colacino, Niclas Solin, Rita Mocci, Andrea Porcheddu
Summary: Mechanochemical transformations have revolutionized the field of chemistry, particularly in organic synthesis, by challenging traditional concepts and opening up new reaction paths.
Article
Physics, Multidisciplinary
Claudio Melis, Giorgio Pia, Elisa Sogne, Andrea Falqui, Stefano Giordano, Francesco Delogu, Luciano Colombo
Summary: By combining different experimental methods, this study theoretically investigates the Young's modulus of nanoporous Au structures. The results show that nanoporous Au stiffens as the ligaments become finer, which is consistent with experimental findings. The study also reveals a direct correlation between the density of dislocations and the Young's modulus, and proposes a microscopic explanation for the observed stiffening phenomenon.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Materials Science, Ceramics
Damiano Angioni, Roberto Orru, Giacomo Cao, Sebastiano Garroni, Devis Bellucci, Valeria Cannillo
Summary: In this study, hydroxyapatite and a lab-made bioactive glass were mixed in certain proportion and subjected to ball milling treatment. The effect of ball milling time on the characteristics of the resulting products was investigated. The results showed that using a 30-minute ball milling mixture significantly improved the apatite-forming ability and resulted in higher Young's Modulus and Vickers Hardness. The microstructural changes induced by ball milling and the formation of intimate HA/BGMS10 interfaces were the main factors responsible for these improvements.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Leonarda Vugrin, Maria Carta, Stipe Lukin, Ernest MeWovia, Francesco Delogu, Ivan Halasz
Summary: Inelastic collisions in ball milling provide energy for chemical transformations and also enable physical mixing of reactants. This study uses in situ reaction monitoring and numerical simulations to reveal the relationship between kinetics and energy input, providing a basis for planning and optimizing mechanochemical reactions.
FARADAY DISCUSSIONS
(2023)
Article
Chemistry, Physical
Marzia Mureddu, Jose F. Bartolome, Sonia Lopez-Esteban, Maria Dore, Stefano Enzo, Alvaro Garcia, Sebastiano Garroni, Lorena Pardo
Summary: Lead-free (Ba0.92Ca0.08)(Ti-0.95 Zr-0.05) O-3 (BCZT) ceramics were successfully prepared using solid-state route and low-temperature synthesis. The activation and homogenization process significantly decreased the perovskite formation temperature. The elimination of secondary phases was achieved through a two-step sintering treatment, resulting in a pure phase BCZT ceramic with excellent electromechanical properties.
Article
Chemistry, Multidisciplinary
Maria Carta, Leonarda Vugrin, Goran Miletic, Marina Juribasic Kulcsar, Pier Carlo Ricci, Ivan Halasz, Francesco Delogu
Summary: Mechanochemical transformations are commonly induced by mechanical processing in ball mills. This study reveals that even a single ball impact can cause trimerization in the powder of a square planar bis(dibenzoylmethanato)Ni-II coordination compound. Through systematic experiments and analysis using Raman spectroscopy, the transformation in the powder compact is quantitatively mapped, and bulk reaction kinetics are deduced from multiple individual impacts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Multidisciplinary
Yuanyuan Shang, Zhifeng Lei, Ebert Alvares, Sebastiano Garroni, Ting Chen, Roberto Dore, Mauro Rustici, Stefano Enzo, Alexander Schoekel, Yunzhu Shi, Paul Jerabek, Zhaoping Lu, Thomas Klassen, Claudio Pistidda
Summary: Researchers reported a TiMgLi-based compositionally complex alloy with ultralow alloy density and significant room temperature hydrogen storage capacity. It achieved the record-low alloy density through multi-principal-lightweight element alloying, and obtained a large hydrogen storage capacity by introducing multiple phases instead of a single phase.
Article
Metallurgy & Metallurgical Engineering
Anna Laura Sanna, Giorgio Pia, Francesco Delogu
Summary: This study focuses on the reduction of grain size induced by ball milling in individual minerals and binary mixtures containing quartz and a softer mineral. All investigated minerals and mineral mixtures experience a significant monotonic decrease in grain size during mechanical processing. The rate at which this process occurs in individual minerals decreases with the hardness of the mineral phase. Hardness also plays a crucial role in mineral mixtures. The final attainable grain size of the softer mineral and the rate of the grain size reduction process depend on the amount of quartz in the mixture. A kinetic model can explain the observed behavior based on the intensity of mechanical stresses generated during individual impacts.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2023)
Article
Materials Science, Ceramics
Damiano Angioni, Roberto Orru, Giacomo Cao, Sebastiano Garroni, Devis Bellucci, Valeria Cannillo
Summary: New Hydroxyapatite-Bioactive Glass composites were successfully developed in this study using different milling times to modify the properties and crystal structure of the materials. Ball milling promoted the consolidation of HA powders and reduced the crystallite size. Spark Plasma Sintering process changed the crystal structure and composition of the composites, affecting the mechanical properties. Moreover, the milling treatment showed no negative effects on cell viability.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
