Absorption, desorption and spectroscopic investigation of sulfur dioxide in the binary system ethylene glycol+dimethyl sulfoxide

Solubility and Spectral Studies for SO2 in a Binary System of Triethylene Glycol + Dimethyl Sulfoxide at T = (298.15, 303.15, and 308.15) K and p = 123.15 kPa

“…As shown in Figure c, the trend of absorption bands shifts from (209 to 214) nm with increasing SO 2 concentrations in TEG (1) + DMSO (2) + SO 2 (3) mixtures, and there are two electron translation bands, namely π* → π * and n → σ *. The absorption bands showed a red-shift, which may be due to the increasing conjugated degree in SO 2 and DMSO molecules from intermolecular interaction among TEG, DMSO, and SO 2 leading to an easier electronic transition change . In addition, these results showed that the absorbed SO 2 molecules could also remain in the mixed solution in the form of free status except for when they interact with DMSO or TEG.…”

“…GLE data of dilute SO 2 in the system of TEG (1) + DMSO (2) ( w 1 = 40%) were plotted in Figure to investigate the absorption property changing with the increasing temperatures. The results indicated that the solubility of SO 2 in a constant concentration decreased with the increase of temperature, which meant heating could be an efficient method for the regeneration of solvents …”

“…The factor in the absorption peak strength was the intermolecular hydrogen bonding. The interactions of the hydroxyl hydrogen atoms in TEG with the oxygen atom in DMSO happened easily with the increase of DMSO concentration, so that the n→π * electronic transition was effortless . The absorption peak red-shifted for two possible reasons: (i) The charge transfer interaction of oxygen hydrogen atoms in TEG with the sulfur atoms in DMSO was strengthened with increasing DMSO concentrations, leading to an increase in the the charge-clouds of SO, which means that the binding effects of the oxygen atoms for the unshaped electronic SO band in DMSO were weakened.…”

Binary mixtures of novel sulfoxides and water: intermolecular structure, dynamic properties, thermodynamics, and cluster analysis

“…If at any point of time any interatomic distance exceeded 0.9 nm, the Particle-Ewald-Mesh technique was employed. 29 The Lennard-Jones (12,6) short-range intermolecular atomatom attraction was smoothly modified between 0.85 nm and the cut-off distance to vanish completely at 0.90 nm. These methodological parameters were pre-determined by the choice of the well previously tested force field.…”

“…[1][2][3][4][5][6][7][8][9] By possessing both polar oxygen and nonpolar side chains, sulfoxides exhibit complex intermolecular interactions with hydrophilic and lipophilic compounds. 3,[10][11][12][13][14] The most widely studied sulfoxide, dimethyl sulfoxide (DMSO), possesses outstanding solvation properties for medical and biological applications, being also often used in organic synthesis as a valuable, and in many senses unique, mild oxidant. 7,9,11,12,15 Furthermore, DMSO readily penetrates skin (phospholipid bilayers), dissolves drugs to obtain pharmaceutically relevant concentrations of the active substances, and efficiently transports them from outside.…”