کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10560668 | 969741 | 2011 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Models for liquid-liquid partition in the system formamide-organic solvent and their use for estimating descriptors for organic compounds
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
Partition coefficients for varied compounds were determined for the organic solvent-formamide biphasic partition system where the organic solvent is 1,2-dichloroethane, 1-octanol or isopentyl ether. These partition coefficient databases are analyzed using the solvation parameter model facilitating a quantitative comparison of the formamide-based partition systems with other totally organic and water-based partition systems. Formamide is shown to be a less cohesive and hydrogen-bond acidic solvent than water with similar hydrogen-bond basicity and dipolarity/polarizability. Compared with other organic solvents its higher cohesion, dipolarity/polarizability and hydrogen-bonding capability make it a useful base solvent for forming biphasic partition systems with a range of system properties obtained through variation of the counter solvent. Formamide-organic solvent systems offer a complementary approach to water-based partition systems for sample preparation and the determination of descriptors for compounds virtually insoluble in water or unstable in water.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 83, Issue 4, 30 January 2011, Pages 1118-1125
Journal: Talanta - Volume 83, Issue 4, 30 January 2011, Pages 1118-1125
نویسندگان
Thushara Karunasekara, Colin F. Poole,