Journal of Solution Chemistry最新文献_第9页

[(EtO)3Si(CH2)3N+H3][CH3COO−] as Basic Ionic Liquid Catalyst Promoted Green Synthesis of Benzo[a]pyrano[2,3-c]phenazine Derivatives in Homogenous Solution 以[(EtO)3Si(CH2)3N+H3][CH3COO-]为碱性离子液体催化剂在均相溶液中促进苯并[a]吡喃并[2,3-c]吩嗪衍生物的绿色合成

IF 1.4 4区化学

Journal of Solution Chemistry Pub Date : 2023-10-26 DOI: 10.1007/s10953-023-01332-w

Farhad Shirzaei, Hamid Reza Shaterian

引用次数: 0

Binary and Ternary Oxovanadium (IV) Complexes with Picolinic Acid and Some Potentially Bidentate Amino Acids Studied by Potentiometric Measurements in 1.0 mol·dm−3 NaCl at 25 °C 在 25 °C 的 1.0 mol-dm-3 NaCl 溶液中通过电位测量法研究吡啶甲酸和一些潜在双齿氨基酸与氧化钒 (IV) 的二元和三元络合物

IF 1.4 4区化学

Journal of Solution Chemistry Pub Date : 2023-10-23 DOI: 10.1007/s10953-023-01331-x

Sabrina Rodríguez, Mary Lorena Araujo, Edgar Del Carpio, Lino Hernández, Vito Lubes

引用次数: 0

Volumetric and Dielectric Properties in Liquid Phase of Dimethyl Ether–Ethanol at (293.2–313.2) K and 1.00 MPa 二甲醚-乙醇在 (293.2-313.2) K 和 1.00 MPa 下的液相体积特性和介电特性

IF 1.4 4区化学

Journal of Solution Chemistry Pub Date : 2023-10-21 DOI: 10.1007/s10953-023-01329-5

Taka-aki Hoshina, Kazunori Sato, Masaki Okada, Tomoya Tsuji, Toshihiko Hiaki

{"title":"Volumetric and Dielectric Properties in Liquid Phase of Dimethyl Ether–Ethanol at (293.2–313.2) K and 1.00 MPa","authors":"Taka-aki Hoshina, Kazunori Sato, Masaki Okada, Tomoya Tsuji, Toshihiko Hiaki","doi":"10.1007/s10953-023-01329-5","DOIUrl":"10.1007/s10953-023-01329-5","url":null,"abstract":"<div>Density and dielectric spectra have been measured in the liquid phase of dimethyl ether (DME)–ethanol by an oscillating U-tube densimeter and a complex dielectric spectrometer under 1.00 MPa. The density was measured at 303.15 and 313.15 K and converted to the excess molar volume. The excess molar volumes were no smaller than − 0.880 and − 0.909 cm3·mol–1 at 303.15 and 313.15 K, respectively. The mole fraction dependence can be correlated with the Redlich–Kister equation, whose minimum was found to be around 0.58 for the mole fraction of DME. The dielectric constant and the dielectric relaxation time were evaluated from the complex dielectric spectra in the frequency range from 0.5 to 18 GHz at (293.2–313.2) K and 1.00 MPa. The dielectric constants and the relaxation time were decreased with the mole fraction of DME, and the latter tended to be around 25 ps in the mole fraction range higher than 0.6. The logarithmic dielectric constants can be correlated with a similar function to the Hildebrand equation with the volume fraction. The effective Kirkwood g-factor was evaluated at 293.2–313.2 K and 1.00 MPa. The g-factors were given by two linear functions crossed around 0.6 for the mole fraction of DME. Considering an atomic composition (C2H6O), the molecular sizes are not so different for DME and ethanol. Then, the solution structure was thought to be microscopically changed around 0.6 for the mole fraction of DME. The mole fraction will be utilized to switch the solubility to extract amphipathic compounds.</div>","PeriodicalId":666,"journal":{"name":"Journal of Solution Chemistry","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135512085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigations on the Thermophysical Properties of Binary Systems of Fatty Acid Esters + Dimethyl Carbonate 脂肪酸酯+碳酸二甲酯二元体系的热物理性质研究

IF 1.4 4区化学

Journal of Solution Chemistry Pub Date : 2023-10-07 DOI: 10.1007/s10953-023-01327-7

Xiang Gao, Biyuan Hong, Meiyu Zhang, Dan Li

引用次数: 0

Magnetite solubility and phase stability in alkaline media at elevated temperatures 磁铁矿在高温碱性介质中的溶解度和相稳定性

IF 1.2 4区化学

Journal of Solution Chemistry Pub Date : 1994-05-01 DOI: 10.2172/34346

S. Ziemniak, M. Jones, K. Combs

{"title":"Magnetite solubility and phase stability in alkaline media at elevated temperatures","authors":"S. Ziemniak, M. Jones, K. Combs","doi":"10.2172/34346","DOIUrl":"https://doi.org/10.2172/34346","url":null,"abstract":"AbstractA platinum-lined flowing autocláve facility was used to investigate the solubility behavior of magnetite (Fe3O4) in alkaline sodium phosphate and ammonium hydroxide solutions between 21 and 288°C. Measured iron solubilities were interpreted via a Fe(II)/Fe(III) ion hydroxo-, phosphato-, and ammino-complexing model and thermodynamic functions for these equilibria were obtained from a least-squares analysis of the data. A total of 14 iron ion species were fitted. Complexing equilibria are reported for 8 new species: Fe(OH)(HPO4)−, Fe(OH)2(HPO4)2−, Fe(OH)3(HPO4)2−, Fe(OH)(NH3)+, Fe(OH)2(PO4)3−, Fe(OH)4(HPO4)3−, Fe(OH)2(H2PO4)−, and Fe(OH)3(H2PO4)3−. At elevated temperatures, hydrolysis and phosphato complexing tended to stabilize Fe(III) relative to Fe(II), as evidenced by free energy changes fitted to the oxidation reactions.\u0000$$begin{gathered} Fe(OH)_3^ - + H_2 O_ leftarrow ^ to Fe(OH)_4^ - + (1/2)H_2 (g) hfill Fe(OH)_2^{} (HPO_4 )^{2 - } + H_2 O_ leftarrow ^ to Fe(OH)_3 (HPO_4 )^{2 - } + (1/2)H_2 (g) hfill end{gathered}$$\u0000 For temperatures below 83°C and for a dissolved hydrogen concentration of 234 μmol-kg−1, the activity of ferrous iron in aqueous solution is controlled by a hydrous Fe(II) oxide solid phase rather than magnetite.","PeriodicalId":666,"journal":{"name":"Journal of Solution Chemistry","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"1994-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68218409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 63