Solvent-Free Ball-Milling Subcomponent Synthesis of Metallosupramolecular Complexes

2015 ◽  
Vol 21 (17) ◽  
pp. 6390-6393 ◽  
Author(s):  
Chandan Giri ◽  
Prasit Kumar Sahoo ◽  
Rakesh Puttreddy ◽  
Kari Rissanen ◽  
Prasenjit Mal
Keyword(s):  
Ball Milling ◽  
Solvent Free

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.

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...

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.

Mechanochemistry for sustainable, efficient dehydrogenation/hydrogenation

2020 ◽  
Author(s):  
Blaine G. Fiss ◽  
Austin James Richard ◽  
Tomislav Friscic ◽  
Audrey Moores
Keyword(s):  
Ball Milling ◽  
Chemical Industry ◽  
Organic Molecules ◽  
Solvent Free ◽  
Chemical Transformations ◽  
Triple Bonds ◽  
Bulk Chemicals ◽  
Challenges And Opportunities ◽  
Hydrogenation Reactions ◽  
Solution Routes

Hydrogenation reactions are one of the pillars of the chemical industry, with applications from bulk chemicals to pharmaceuticals manufacturing. The ability to selectively add hydrogen across double and/or triple bonds is key in the chemist’s toolbox, and the enabling component in the development of sustainable processes. Traditional solution-based approaches to hydrogenation reactions are tainted by significant consumption of energy and production of solvent waste. This review highlights the development and applications of recently emerged solvent-free approaches to conduct the hydrogenation of organic molecules using mechanochemistry, i.e. chemical transformations induced or sustained by mechanical force. In particular, we will show how mechanochemical techniques such as ball-milling enable catalytic or stoichiometric metal-mediated hydrogenation reactions that are simple, fast, and are conducted under significantly milder conditions compared to traditional solution routes. Importantly, we highlight the current challenges and opportunities in this field, while also identifying exciting cases in which mechanochemical hydrogenation strategies lead to new, unique targets and reactivity.

Solvent-free Sonogashira coupling reaction via high speed ball milling

2009 ◽  
Vol 11 (11) ◽  
pp. 1821 ◽  
Author(s):  
Dennis A. Fulmer ◽  
William C. Shearouse ◽  
Shareika T. Medonza ◽  
James Mack
Keyword(s):  
Ball Milling ◽  
High Speed ◽  
Coupling Reaction ◽  
Solvent Free ◽  
Sonogashira Coupling ◽  
Sonogashira Coupling Reaction ◽  
High Speed Ball Milling
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