scholarly journals Solvent free mechanochemical synthesis of Eu3+ complex and its luminescent sensing of trace water and temperature

RSC Advances ◽  
2017 ◽  
Vol 7 (24) ◽  
pp. 14314-14320 ◽  
Author(s):  
Daqing Yang ◽  
Zhiqiang Li ◽  
Liang He ◽  
Yucheng Deng ◽  
Yige Wang
Keyword(s):  
Solid State ◽  
Mechanochemical Synthesis ◽  
Solvent Free ◽  
Mechanochemical Method ◽  
Trace Water ◽  
Luminescent Sensing

A solid state Eu(iii) complex was synthesized by a mechanochemical method and used for luminescent sensing of trace water and temperature.

Solvent-free mechanochemical synthesis of alane, AlH3: effect of pressure on the reaction pathway

2014 ◽  
Vol 16 (9) ◽  
pp. 4378-4388 ◽  
Author(s):  
S. Gupta ◽  
T. Kobayashi ◽  
I. Z. Hlova ◽  
J. F. Goldston ◽  
M. Pruski ◽  
...  
Keyword(s):  
Solid State ◽  
Mechanochemical Synthesis ◽  
Room Temperature ◽  
Reaction Pathway ◽  
Gas Pressure ◽  
Solvent Free ◽  
Metallic Aluminum ◽  
Effect Of Pressure

By application of reasonably low gas pressure, formation of metallic aluminum is completely suppressed during the solid-state mechanochemical synthesis of AlH3 at room temperature.

scholarly journals Mechanochemical Synthesis of a Cocrystal of Two Supramolecular Hydrogen-Bonded Aggregates of 1,3,6,8-Tetraazatricyclo[4.3.1.13,8]undecane (TATU) with 4-tert-Butylphenol Bearing Different Hydrogen Bonding Interactions

Crystals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 309
Author(s):  
Augusto Rivera ◽  
Jicli Rojas ◽  
Jaime Ríos-Motta ◽  
Michael Bolte
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Single Crystal ◽  
Mechanochemical Synthesis ◽  
Supramolecular Assembly ◽  
Spectroscopic Properties ◽  
Solvent Free ◽  
Single Crystal Structure ◽  
Mechanochemical Method ◽  
Hydrogen Bonding Interactions

The synthesis and single crystal structure of a new cocrystal, which is composed of OHphenolic∙∙∙OHphenolic∙∙∙Naminalic supramolecular heterosynthons assembled from 4-tert-butylphenol and the macrocyclic aminal TATU, is presented. This cocrystal was prepared by solvent-free assisted grinding, which is a commonly used mechanochemical method. Crystal structure, supramolecular assembly through hydrogen bonding interactions as well as the physical and spectroscopic properties of the title cocrystal are presented in this paper.

Directly bonded hybrid of graphene nanoplatelets and fullerene: facile solid-state mechanochemical synthesis and application as carbon-based electrocatalyst for oxygen reduction reaction

2015 ◽  
Vol 3 (8) ◽  
pp. 4139-4146 ◽  
Author(s):  
Jian Guan ◽  
Xiang Chen ◽  
Tao Wei ◽  
Fupin Liu ◽  
Song Wang ◽  
...  
Keyword(s):  
Solid State ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Ball Milling ◽  
Mechanochemical Synthesis ◽  
Reduction Reaction ◽  
Graphene Nanoplatelets ◽  
Mechanochemical Method ◽  
Carbon Based

The first directly bonded hybrid of graphene nanoplatelets and C60 is successfully synthesized using a facile solid-state mechanochemical method via ball milling with LiOH as a catalyst.

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.

Room Temperature Solvent-Free Synthesis of Monodisperse Magnetite Nanocrystals

2006 ◽  
Vol 6 (3) ◽  
pp. 852-856 ◽  
Author(s):  
X. R. Ye ◽  
C. Daraio ◽  
C. Wang ◽  
J. B. Talbot ◽  
S. Jin
Keyword(s):  
Oleic Acid ◽  
Solid State ◽  
Large Scale ◽  
Room Temperature ◽  
Solvent Free ◽  
Two Dimensional ◽  
New Process ◽  
High Boiling Point ◽  
Magnetite Nanocrystals ◽  
Solvent Free Synthesis

We have successfully demonstrated a facile, solvent-free synthesis of highly crystalline and monodisperse Fe3O4 nanocrystallites at ambient temperature avoiding any heating. Solid state reaction of inorganic Fe(II) and Fe(III) salts with NaOH was found to produce highly crystalline Fe3O4 nanoparticles. The reaction, if carried out in the presence of surfactant such as oleic acid–oleylamine adduct, generated monodisperse Fe3O4 nanocrystals extractable directly from the reaction mixture. The extracted nanoparticles were capable of forming self-assembled, two-dimensional and uniform periodic array. The new process utilizes inexpensive and nontoxic starting materials, and does not require a use of high boiling point and toxic solvents, thus is amenable to an environmentally desirable, large-scale synthesis of nanocrystals.

scholarly journals Investigation of Solvatomorphism and Its Photophysical Implications for Archetypal Trinuclear Au3(1-Methylimidazolate)3

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4404
Author(s):  
Shengyang Guan ◽  
David C. Mayer ◽  
Christian Jandl ◽  
Sebastian J. Weishäupl ◽  
Angela Casini ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Density Functional ◽  
Bulk Material ◽  
Variable Temperature ◽  
Active Phase ◽  
Solvent Free ◽  
X Ray Diffraction ◽  
X Ray ◽  
Aurophilic Interactions

A new solvatomorph of [Au3(1-Methylimidazolate)3] (Au3(MeIm)3)—the simplest congener of imidazolate-based Au(I) cyclic trinuclear complexes (CTCs)—has been identified and structurally characterized. Single-crystal X-ray diffraction revealed a dichloromethane solvate exhibiting remarkably short intermolecular Au⋯Au distances (3.2190(7) Å). This goes along with a dimer formation in the solid state, which is not observed in a previously reported solvent-free crystal structure. Hirshfeld analysis, in combination with density functional theory (DFT) calculations, indicates that the dimerization is generally driven by attractive aurophilic interactions, which are commonly associated with the luminescence properties of CTCs. Since Au3(MeIm)3 has previously been reported to be emissive in the solid-state, we conducted a thorough photophysical study combined with phase analysis by means of powder X-ray diffraction (PXRD), to correctly attribute the photophysically active phase of the bulk material. Interestingly, all investigated powder samples accessed via different preparation methods can be assigned to the pristine solvent-free crystal structure, showing no aurophilic interactions. Finally, the observed strong thermochromism of the solid-state material was investigated by means of variable-temperature PXRD, ruling out a significant phase transition being responsible for the drastic change of the emission properties (hypsochromic shift from 710 nm to 510 nm) when lowering the temperature down to 77 K.

scholarly journals Mechanochemical and solvent-free assembly of zirconium-based metal–organic frameworks

2016 ◽  
Vol 52 (10) ◽  
pp. 2133-2136 ◽  
Author(s):  
Krunoslav Užarević ◽  
Timothy C. Wang ◽  
Su-Young Moon ◽  
Athena M. Fidelli ◽  
Joseph T. Hupp ◽  
...  
Keyword(s):  
Solid State ◽  
High Temperatures ◽  
Self Assembly ◽  
Metal Organic Frameworks ◽  
Accelerated Aging ◽  
Solvent Free ◽  
Catalytically Active ◽  
Metal Organic ◽  
Strong Acids ◽  
Zirconium Metal

Mechanochemistry and accelerated aging are new routes to zirconium metal–organic frameworks, yielding UiO-66 and catalytically active UiO-66-NH2 accessible on the gram scale through mild solid-state self-assembly, without strong acids, high temperatures or excess reactants.

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