scholarly journals One Step Conversion of Glucose into 5-Hydroxymethylfurfural (HMF) via a Basic Catalyst in Mixed Solvent Systems of Ionic Liquid-Dimethyl Sulfoxide

2019 ◽  
Vol 68 (3) ◽  
pp. 261-271
Author(s):  
Zhe Tang ◽  
Jianhui Su
Keyword(s):  
Ionic Liquid ◽  
Dimethyl Sulfoxide ◽  
Mixed Solvent ◽  
Basic Catalyst ◽  
One Step ◽  
Solvent Systems

Solute–solvent effects in the dissociation of thymolsulfonephthalein (an uncharged acid) in aqueous mixtures of acetonitrile (ACN), urea, and dimethyl sulfoxide (DMSO)

1986 ◽  
Vol 64 (8) ◽  
pp. 1521-1526 ◽  
Author(s):  
A. L. De ◽  
A. K. Atta
Keyword(s):  
Solvent Effect ◽  
Dimethyl Sulfoxide ◽  
Solvent Effects ◽  
Mixed Solvent ◽  
Dissociation Constants ◽  
Aqueous Mixtures ◽  
Solvent Interactions ◽  
Gibbs Energies ◽  
Gibbs Energies Of Transfer ◽  
Solvent Systems

The thermodynamic first dissociation constants, [Formula: see text] of thymolsulfonephthalein (H2A), an uncharged acid, have been determined at 25 °C in aqueous mixtures of 10, 30, 50, 70, and 80 wt% acetonitrile (ACN), 11.52, 20.31, 29.64, and 36.83 wt% urea, 20, 40, 60, and 80 wt% dimethyl sulfoxide (DMSO) by spectrophotometric measurements. The solvent effect represented by ∂(ΔG0) = 2.303RT[p(sK)N − p(wK)N] is found to increase in ACN + H2O system as mol% ACN increases in the solvent. In contrast, the corresponding values in urea + H2O as well as DMSO + H2O solvent systems decrease with increase in proportion of organic component in the solvent, the decrease being sharp in urea + H2O. The results have been discussed in terms of the standard Gibbs energies of transfer of H+ from water to the mixed solvent, [Formula: see text] and the relative values of the standard Gibbs energies of transfer of HA−, [Formula: see text] and of [Formula: see text] in all the solvent systems. The overall dissociation behaviour of the acid (H2A) is found to be dictated by the specific solute-solvent interactions of the species participating in the dissociation equilibria.

One-step fabrication of photoluminescent SiC quantum dots through a radiation technique

2020 ◽  
Vol 44 (31) ◽  
pp. 13301-13307
Author(s):  
Wei Qi ◽  
Mengjie Li ◽  
Long Zhao
Keyword(s):  
Quantum Dots ◽  
Ionic Liquid ◽  
Electron Beam ◽  
Beam Radiation ◽  
Electron Beam Radiation ◽  
Radiation Technique ◽  
One Step

The fabrication of PL SiC-QDs by using ionic liquid-based microemulsions combined with electron beam radiation.

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