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Faculty of Sciences
Document Details
Document Type
:
Article In Journal
Document Title
:
Solvation and temperature effect on the charge-transfer complex between 2-amino-4-picoline with 2,5-dihydroxy-p-benzoquinone
Solvation and temperature effect on the charge-transfer complex between 2-amino-4-picoline with 2,5-dihydroxy-p-benzoquinone
Document Language
:
English
Abstract
:
The charge-transfer (CT) complex between the donor 2-amino-4-picoline (2A4P) and the acceptor 2,5-dihydroxy-p-benzoquinone (DHBQ) was studied spectrophotometrically in different polar and non-polar solvents. The molecular composition of the complex, in all solvents, was determined by Job's method of continuous variation and photometric titrations to be 1:1. Benesi-Hildebrand equation has been applied to estimate the formation constant (K-CT) and molecular extinction coefficient (epsilon) of the formed complex. The variation in K-CT was rationalised based on Taft-Kamlet and electric permittivity parameters of the used solvents. Thermodynamic parameters H degrees, G degrees and S degrees were estimated, they were all negative so the studied complex is reasonably stable and exothermic in nature. In addition, the thermodynamic properties were observed to be sensitive to the nature of the solvent. Moreover, the solid 1:1 CT complex between 2A4P and DHBQ was isolated and characterised using elemental analysis, FTIR and H-1 NMR measurements.
ISSN
:
0031-9104
Journal Name
:
PHYSICS AND CHEMISTRY OF LIQUIDS
Volume
:
51
Issue Number
:
5
Publishing Year
:
1434 AH
2013 AD
Article Type
:
Article
Added Date
:
Tuesday, July 25, 2017
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
R Alghanmi
Alghanmi, R
Researcher
Files
File Name
Type
Description
42220.pdf
pdf
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