ChemInform Abstract: Application of Ball Milling Technology to Carbohydrate Reactions. Part 3. Solvent-Free Mechanochemical Synthesis of Aryl Glycosides.

ChemInform ◽  
2009 ◽  
Vol 40 (20) ◽  
Author(s):  
Premanand Ramrao Patil ◽  
K. P. Ravindranathan Kartha
Keyword(s):  
Ball Milling ◽  
Mechanochemical Synthesis ◽  
Solvent Free ◽  
Aryl Glycosides

scholarly journals Mechanochemical synthesis of poly(trimethylene carbonate)s: an example of rate acceleration

2019 ◽  
Vol 15 ◽  
pp. 963-970 ◽  
Author(s):  
Sora Park ◽  
Jeung Gon Kim
Keyword(s):  
Ball Milling ◽  
Mechanochemical Synthesis ◽  
Polymeric Materials ◽  
Solvent Free ◽  
Energy Output ◽  
Polymerization Temperature ◽  
Mechanical Degradation ◽  
Trimethylene Carbonate ◽  
Rate Acceleration ◽  
Conventional Solution

Mechanochemical polymerization is a rapidly growing area and a number of polymeric materials can now be obtained through green mechanochemical synthesis. In addition to the general merits of mechanochemistry, such as being solvent-free and resulting in high conversions, we herein explore rate acceleration under ball-milling conditions while the conventional solution-state synthesis suffer from low reactivity. The solvent-free mechanochemical polymerization of trimethylene carbonate using the organocatalysts 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) and 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) are examined herein. The polymerizations under ball-milling conditions exhibited significant rate enhancements compared to polymerizations in solution. A number of milling parameters were evaluated for the ball-milling polymerization. Temperature increases due to ball collisions and exothermic energy output did not affect the polymerization rate significantly and the initial mixing speed was important for chain-length control. Liquid-assisted grinding was applied for the synthesis of high molecular weight polymers, but it failed to protect the polymer chain from mechanical degradation.

scholarly journals Mechanochemical synthesis of inorganic halide perovskites: evolution of phase-purity, morphology, and photoluminescence

2019 ◽  
Vol 7 (37) ◽  
pp. 11406-11410 ◽  
Author(s):  
Francisco Palazon ◽  
Yousra El Ajjouri ◽  
Paz Sebastia-Luna ◽  
Simone Lauciello ◽  
Liberato Manna ◽  
...  
Keyword(s):  
Ball Milling ◽  
Mechanochemical Synthesis ◽  
Solvent Free ◽  
Phase Purity ◽  
Phase Pure ◽  
Halide Perovskites

Solvent-free mechanochemical synthesis of phase-pure inorganic halide perovskites is investigated in depth revealing several beneficial and detrimental effects of ball-milling.

Solvent-Free Mechanochemical Synthesis of Aryl Glycosides[1]

2008 ◽  
Vol 27 (7) ◽  
pp. 411-419 ◽  
Author(s):  
Premanand Ramrao Patil ◽  
K. P. Ravindranathan Kartha
Keyword(s):  
Mechanochemical Synthesis ◽  
Solvent Free ◽  
Aryl Glycosides

scholarly journals Solvent-Free Mechanochemical Synthesis of ZnO Nanoparticles by High-Energy Ball Milling of ε-Zn(OH)2 Crystals

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 238
Author(s):  
Gil Otis ◽  
Michal Ejgenberg ◽  
Yitzhak Mastai
Keyword(s):  
Ball Milling ◽  
Mechanochemical Synthesis ◽  
Zno Nanoparticles ◽  
High Energy ◽  
Milling Process ◽  
Solvent Free ◽  
Synthetic Route ◽  
Ambient Conditions ◽  
Milling Duration ◽  
Energy Ball

A detailed investigation is presented for the solvent-free mechanochemical synthesis of zinc oxide nanoparticles from ε-Zn(OH)2 crystals by high-energy ball milling. Only a few works have ever explored the dry synthetic route from ε-Zn(OH)2 to ZnO. The milling process of ε-Zn(OH)2 was done in ambient conditions with a 1:100 powder/ball mass ratio, and it produced uniform ZnO nanoparticles with sizes of 10–30 nm, based on the milling duration. The process was carefully monitored and the effect of the milling duration on the powder composition, nanoparticle size and strain, optical properties, aggregate size, and material activity was examined using XRD, TEM, DLS, UV-Vis, and FTIR. The mechanism for the transformation of ε-Zn(OH)2 to ZnO was studied by TGA and XPS analysis. The study gave proof for a reaction mechanism starting with a phase transition of crystalline ε-Zn(OH)2 to amorphous Zn(OH)2, followed by decomposition to ZnO and water. To the best of our knowledge, this mechanochemical approach for synthesizing ZnO from ε-Zn(OH)2 is completely novel. ε-Zn(OH)2 crystals are very easy to obtain, and the milling process is done in ambient conditions; therefore, this work provides a simple, cheap, and solvent-free way to produce ZnO nanoparticles in dry conditions. We believe that this study could help to shed some light on the solvent-free transition from ε-Zn(OH)2 to ZnO and that it could offer a new synthetic route for synthesizing ZnO nanoparticles.

Mechanochemical synthesis of poly(lactic acid) block copolymers: overcoming the miscibility of the macroinitiator, monomer and catalyst under solvent-free conditions

2019 ◽  
Vol 10 (4) ◽  
pp. 539-545 ◽  
Author(s):  
Gue Seon Lee ◽  
Bo Reum Moon ◽  
Haemin Jeong ◽  
Jihoon Shin ◽  
Jeung Gon Kim
Keyword(s):  
Lactic Acid ◽  
Block Copolymers ◽  
Ball Milling ◽  
Mechanochemical Synthesis ◽  
Solvent Free ◽  
Poly Lactic Acid ◽  
Energy Delivery ◽  
Solvent Free Conditions

Efficient mixing and energy delivery by ball-milling promoted the lactide polymer growth from macroinitiators without the use of a solvent.

Catalyst- and solvent-free Csp2-H functionalization of 4-hydroxycoumarins via C-3 dehydrogenative aza-coupling under ball-milling

2021 ◽  
Author(s):  
Goutam Brahmachari ◽  
Indrajit Karmakar ◽  
Pintu Karmakar
Keyword(s):  
Ball Milling ◽  
Aromatic Amines ◽  
Solvent Free ◽  
One Pot ◽  
Biologically Relevant ◽  
Tert Butyl ◽  
Three Component Reaction ◽  
Primary Aromatic Amines

A one-pot procedure for the synthesis of biologically relevant coumarin-hydrazones by a three-component reaction between 4-hydrocoumarins, primary aromatic amines and tert-butyl nitrite under ball-milling in the absence of any catalyst/additive...

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