List of participants
Poster list
Concluding remarks: Fundamentals, applications and future of mechanochemistry
Mechanochemical response is the result of a complex integration of many factors, but methods for disentangling the various contributions are emerging.
Spiers Memorial Lecture: Mechanochemistry, tribochemistry, mechanical alloying – retrospect, achievements and challenges
The paper presents a view on the achievements, challenges and prospects of mechanochemistry. The extensive reference list can serve as a good entry point to a plethora of mechanochemical literature.
Direct observation by high resolution transmission electron microscopy of gold(III) particle transformation during aging reduction reaction
We use a gold nanoparticle synthesis as a model system to study the morphological and compositional changes in gold(III) precursor particles, while reduction is taking place during aging after mechanical activation.
Paper
17O solid state NMR as a valuable tool for deciphering reaction mechanisms in mechanochemistry: the case study on the 17O-enrichment of hydrated Ca-pyrophosphate biominerals
The possibility of enriching in 17O the water molecules within hydrated biominerals belonging to the Ca-pyrophosphate family was investigated, using liquid assisted grinding (LAG) in the presence of 17O-labelled water.
The “η-sweet-spot” (ηmax) in liquid-assisted mechanochemistry: polymorph control and the role of a liquid additive as either a catalyst or an inhibitor in resonant acoustic mixing (RAM)
Resonant acoustic mixing (RAM) enables mechanochemical synthesis without milling media or bulk solvents.
Mechanosynthesis and photophysics of colour-tunable photoluminescent group 13 metal complexes with sterically demanding salen and salophen ligands
A series of four photoluminescent Al and In complexes were synthesised using an environmentally-benign mechanosynthesis strategy.
What stress components drive mechanochemistry? A study of ZDDP tribofilm formation
The goal of the present work is to determine the independent effects of compressive stress, shear stress, and temperature on tribofilm-formation kinetics.
Application of resonant acoustic mixing in the synthesis of vitamin C–nicotinamide variable stoichiometry cocrystals
The use of resonant acoustic mixing (RAM) to synthesize variable stoichiometry cocrystals of nicotinamide and vitamin C was investigated.
Polymorphs and solid solutions: materials with new luminescent properties obtained through mechanochemical transformation of dicyanoaurate(I) salts
Previously unreported, luminescent polymorphs and solid solutions of a simple gold(I) salt, accessed through heating and mechanochemistry.
Paper
The mechanochemical excitation of crystalline LiN3
Dynamic mechanical stress leads to rapid and transient vibrational excitation of crystalline solids, greatly altering their chemical reactivity.
Piezoelectric harvesting of mechanical energy for redox chemistry
Mechanical energy wasted during ball milling is converted to electrical energy via a piezoelectric element. The extraction of energy is monitored through the reduction of methylene blue to its colorless form.
Mechanochemical preparation of a modified NiAl2O4 structure
An increase in milling energy results in higher levels of non-crystallinity, surface modification and indications of Ni–Al–O interactions. Evidence of mechanochemical activation is demonstrated with higher quantities of NiAl2O4.
Accurate extrinsic and intrinsic peak broadening modelling for time-resolved in situ ball milling reactions via synchrotron powder X-ray diffraction
A state-of-the-art Rietveld refinement strategy is proposed to derive the instrumental resolution function (IRF) for a ball-mill setup for time-resolved in situ (TRIS) synchrotron XRPD.
Solid-state cross-coupling reactions of insoluble aryl halides under polymer-assisted grinding conditions
The efficiency of challenging solid-state cross-coupling of insoluble aryl halides was improved by the addition of polytetrafluoroethylene (PTFE) as a POLAG additive under high-temperature ball-milling conditions.
Paper
AgX-based hybrid coordination polymers: mechanochemical synthesis, structure and luminescence property characterization
Hybrid coordination polymers (HCP) are interesting for the ability to converge the properties of inorganic and organic systems in one single compound and our attention has been focused on silver-based HCP due to their luminescence properties.
Paper
A mechanochemical approach to the synthesis of sydnones and derivatives
Sydnones and iminosydnones were synthesized via mechanochemistry.
Photomechanochemical control over stereoselectivity in the [2 + 2] photodimerization of acenaphthylene
Unique and orthogonal photomechanochemical and photosolvochemical stereoselective routes for cycloaddition of acenaphthylene with high yields of syn and anti products are reported.
Paper
Controlling polymorphism in molecular cocrystals by variable temperature ball milling
Selectively tuning the polymorphism of an organic cocrystal system by controlling the equilibrium milling temperature.
Shear-activated chemisorption and association of cyclic organic molecules
Shear-activated reactions of simple cyclic organic molecules are studied to isolate the effect of chemical structure on reaction yield and pathway.
The impact of the physical state and the reaction phase in the direct mechanocatalytic Suzuki–Miyaura coupling reaction
The direct mechanocatalytic Suzuki–Miyaura coupling reaction, utilizing palladium milling balls as active catalysts, was investigated regarding the physical state of the reagents and the reaction phase.
Electro-mechanochemical approach towards the chloro sulfoximidations of allenes under solvent-free conditions in a ball mill
Under mechanochemical conditions, BaTiO3 nanoparticles activate a Cu(II)/ligand combination, allowing the catalytic addition of sulfoximidoyl chlorides to allenes.
Mechanochemical reaction kinetics scales linearly with impact energy
Inelastic collisions of in ball milling provide energy to drive the chemical transformation which is, for purely mechanically driven reactions, linear with the energy dose received.
Mechanochemical solid-state vinyl polymerization with anionic initiator
The polymerization of vinyl monomers with an anionic initiator was performed under mechanochemical ball-milling conditions. The investigation revealed that the process consists of anionic initiation and radical propagation.
Mechanochemical synthesis of non-stoichiometric copper sulfide Cu1.8S applicable as a photocatalyst and antibacterial agent and synthesis scalability verification
Digenite Cu1.8S nanoparticles with photocatalytic and antibacterial activity were successfully prepared via one-step mechanochemical synthesis in a laboratory-scale and scalable fashion.
Scale up and industrial implementation: general discussion
Kinetics and basic understanding: general discussion
Advances in synthesis: general discussion
Shear processes and polymer mechanochemistry: general discussion
About this collection
We are delighted to share with you a selection of the papers associated with a Faraday Discussion on Mechanochemistry: Fundamentals, applications and future. More information about the related event may be found here: http://rsc.li/mechano-fd2022. Additional articles will be added to the collection as they are published. The final versions of all the articles presented and a record of the discussions will be published after the event.
In recent years, the remarkable renaissance of mechanochemistry has accelerated. It is now moving firmly from a niche technique, until recently applied only to the synthesis of insoluble materials, into the mainstream of chemical synthesis. It has now come to span supramolecular materials, inorganic (main group, coordination complexes, MOFs) the broad realm of organic synthesis, pharmaceutical screening, materials development, sustainable chemistry and reaction discovery, as well as its more traditional applications in alloying etc. Recent applications in recycling have enabled unprecedentedly efficient and clean routes to activate, extract and re-use critical and noble metals, and new opportunities have just opened up through development of enzyme-catalyzed reactivity in the absence of solvents, an uncharted area of not only mechanochemistry but also biochemistry. This meeting will cover 4 main themes: Advances in synthesis, Shear processes and polymer mechanochemistry, Kinetics and basic understanding and Scale up and industrial implementation.
On behalf of the Scientific Committee, we hope you join us and participate in this exciting event, and that you enjoy these articles and the record of the discussion.