Solvent-free mechanochemical synthesis of well-dispersed single crystalline zinc hydroxystannate and their photocatalytic properties

CrystEngComm ◽  
2012 ◽  
Vol 14 (8) ◽  
pp. 2950 ◽  
Author(s):  
Ming Wang ◽  
Xueli Cao ◽  
Yunfang Huang ◽  
Chongshen Guo ◽  
Lijun Huang ◽  
...  
Keyword(s):  
Mechanochemical Synthesis ◽  
Solvent Free ◽  
Photocatalytic Properties ◽  
Single Crystalline ◽  
Zinc Hydroxystannate

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 The mechanochemical synthesis of quinazolin-4(3H)-ones by controlling the reactivity of IBX

2018 ◽  
Vol 14 ◽  
pp. 2396-2403 ◽  
Author(s):  
Md Toufique Alam ◽  
Saikat Maiti ◽  
Prasenjit Mal
Keyword(s):  
Chemical Reactions ◽  
Mechanochemical Synthesis ◽  
Exothermic Reaction ◽  
Amide Group ◽  
Solvent Free ◽  
Hypervalent Iodine ◽  
Maximum Contact

Performing any synthesis using several arylamines and hypervalent iodine(V) reagents by direct mixing is unrealistic because of the high exothermic reaction or explosion. Herein we demonstrate, when anilines were substituted with an amide group at the ortho-position, successful chemical reactions could be performed due to intramolecular control. At maximum contact of the reacting substances, i.e., under solvent-free mechanochemical conditions, 2-aminobenzamides, aryl-, alkylaldehydes and the iodine(V) reagent o-iodoxybenzoic acid (IBX) led to substituted quinazolin-4(3H)-one derivatives in fair yields.

Solvent-free autocatalytic supramolecular polymerization

2021 ◽  
Author(s):  
Zhen Chen ◽  
Yukinaga Suzuki ◽  
Aymui Imayoshi ◽  
Xiaofan Ji ◽  
Kotagiri Rao ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Solvent Free ◽  
High Yield ◽  
Equilibrium Conditions ◽  
Cross Sectional ◽  
Single Crystalline ◽  
Chemical Manufacturing ◽  
Bonding Interaction ◽  
High Yields ◽  
Supramolecular Polymerization

Abstract Solvent-free chemical manufacturing is one of the awaited technologies for addressing an emergent issue of serious environmental pollution. Here, we report "solvent-free autocatalytic supramolecular polymerization (SF-ASP)", where a phthalonitrile derivative with hydrogen-bonding side chains as the monomer is autocatalytically transformed into the corresponding phthalocyanine in an exceptionally high yield (> 80%). The target phthalocyanine, if any is produced, nucleates and initiates supramolecular polymerization via a hydrogen-bonding interaction, affording one-dimensional single-crystalline fibers. These crystalline fibers possibly preorganize the precursor phthalonitrile monomer at their cross-sectional edges and autocatalytically convert them into the phthalocyanine under out-of-equilibrium conditions. In the presence of metal oleates, SF-ASP autocatalytically affords single-crystalline fibers of metallophthalocyanines again in exceptionally high yields. In these cases, such fibers grow in both directions without terminal coupling until the precursor phthalonitrile is completely consumed. By taking advantage of this quasi-living character of polymerization, multistep SF-ASP without/with metal oleates affords multi-block supramolecular copolymers.

The solvent-free mechanochemical synthesis of mildly oxidized graphene oxide and its application as a novel conductive surfactant

2019 ◽  
Vol 43 (18) ◽  
pp. 7057-7064 ◽  
Author(s):  
Jianhui Chen ◽  
Wufeng Chen ◽  
Dongcheng Song ◽  
Bin Lai ◽  
Yuanyuan Sheng ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Mechanochemical Synthesis ◽  
Solvent Free ◽  
Electrically Conductive

A solvent-free mechanochemical synthetic mildly oxidized graphene oxide (MOGO) can act as an electrically conductive surfactant for dispersing nanoparticles.

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.

Seedless Synthesis and Thermal Decomposition of Single Crystalline Zinc Hydroxystannate Cubes

2009 ◽  
Vol 9 (10) ◽  
pp. 4456-4460 ◽  
Author(s):  
Gregory Wrobel ◽  
Martin Piech ◽  
Sameh Dardona ◽  
Yong Ding ◽  
Pu-Xian Gao
Keyword(s):  
Thermal Decomposition ◽  
Single Crystalline ◽  
Zinc Hydroxystannate

Rapid mechanochemical synthesis of metal–organic frameworks using exogenous organic base

2020 ◽  
Vol 49 (45) ◽  
pp. 16238-16244 ◽  
Author(s):  
Zihao Wang ◽  
Zongzhe Li ◽  
Marcus Ng ◽  
Phillip J. Milner
Keyword(s):  
Mechanochemical Synthesis ◽  
Metal Organic Frameworks ◽  
Solvent Free ◽  
Organic Base ◽  
Metal Organic ◽  
First Time ◽  
Solvent Free Synthesis

We describe the mechanochemical, solvent-free synthesis of metal–organic frameworks using liquid organic base for the first time.

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