scholarly journals Electron Donor-Acceptor Interaction of 8-Hydroxyquinoline with Citric Acid in Different Solvents: Spectroscopic Studies

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Demelash Jado ◽  
Khalid Siraj ◽  
Nathan Meka
Keyword(s):  
Charge Transfer ◽  
Citric Acid ◽  
Complex Formation ◽  
Electron Donor ◽  
Formation Constant ◽  
Charge Transfer Complex ◽  
Standard Free Energy ◽  
Physical Parameters ◽  
Stoichiometric Ratio ◽  
Standard Free Energy Change

Charge transfer complex formation between 8-hydroxyquinoline as the electron donor and citric acid as the electron acceptor has been studied spectrophotometrically in ethanol and methanol solvents at room temperature. Absorption band due to charge transfer complex formation was observed near 320 and 325 nm in ethanol and methanol, respectively. The stoichiometric ratio of the complex has been found 3 : 1 by using Job’s and conductometric titration methods. Benesi-Hildebrand equation has been applied to estimate the formation constant and molecular extinction coefficient. It was found that the value of formation constant was larger in ethanol than in methanol. The physical parameters, ionization potential, and standard free energy change of the formed complex were determined and evaluated in the ethanol and methanol solvents.

scholarly journals Spectrophotometric determination of cefixime by charge transfer complex formation

2013 ◽  
Vol 10 (3) ◽  
pp. 971-976
Author(s):  
Baghdad Science Journal
Keyword(s):  
Charge Transfer ◽  
Complex Formation ◽  
Spectrophotometric Determination ◽  
Electron Donor ◽  
Charge Transfer Complex ◽  
Pure Form ◽  
Colored Complex ◽  
Spectrophotometric Methods ◽  
Beer’S Law

Simple, sensitive and economical spectrophotometric methods have been developed for the determination of cefixime in pure form. This method is based on the reaction of cefixime as n-electron donor with chloranil to give highly colored complex in ethanol which is absorb maximally at 550 nm. Beer's law is obeyed in the concentration ranges 5-250 µg ml-1 with high apparent molar absorptivities of 1.52×103 L.mole-1. cm-1.

A new route towards deep desulfurization: selective charge transfer complex formation

1998 ◽  
pp. 305-306 ◽  
Author(s):  
Valérie Meille ◽  
Emmanuelle Schulz ◽  
Valérie Meille ◽  
Michel Vrinat ◽  
Marc Lemaire
Keyword(s):  
Charge Transfer ◽  
Complex Formation ◽  
Charge Transfer Complex ◽  
Deep Desulfurization

scholarly journals DETERMINATION OF TRIMETHOPRIM BY CHARGE-TRANSFER COMPLEX FORMATION

1994 ◽  
Vol 3 (2) ◽  
pp. 132-141
Author(s):  
Mohamed El Balkiny ◽  
Gamal Ragab ◽  
Magda Ayad
Keyword(s):  
Charge Transfer ◽  
Complex Formation ◽  
Charge Transfer Complex

scholarly journals Novel-Type Charge-Transfer Complex Formation between Indoxyl Sulfate and Anthraquinonesulfonate Ions in an Aqueous Polyelectrolyte Solution

2003 ◽  
Vol 35 (1) ◽  
pp. 50-55 ◽  
Author(s):  
Yoshiya Kawabata ◽  
Tomoyuki Itaya ◽  
Kazuyoshi Ueda ◽  
Hiroshi Ochiai ◽  
Yuriko Aoki ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Complex Formation ◽  
Charge Transfer Complex ◽  
Indoxyl Sulfate ◽  
Polyelectrolyte Solution
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