Charge transfer complex formation between TX-100/CCl4reverse micelle and a series of π-electron acceptors: determination of cmc and aggregation number

2010 ◽  
Vol 108 (11) ◽  
pp. 1505-1511 ◽  
Author(s):  
Nipamanjari Deb ◽  
Sanjib Bagchi ◽  
Asok K. Mukherjee
Keyword(s):  
Charge Transfer ◽  
Complex Formation ◽  
Charge Transfer Complex ◽  
Aggregation Number ◽  
Electron Acceptors

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 Influence of acceptor functionality on charge transfer interactions in mixtures of poly(9-vinylcarbazole) with nitroaromatic compounds

2012 ◽  
Vol 10 (2) ◽  
pp. 313-319 ◽  
Author(s):  
Anca Grigoras ◽  
Virgil Barboiu
Keyword(s):  
Molecular Weight ◽  
Charge Transfer ◽  
Complex Formation ◽  
Charge Transfer Complex ◽  
Average Molecular Weight ◽  
Nitro Compounds ◽  
Nitroaromatic Compounds ◽  
Association Constants ◽  
Electron Acceptors ◽  
Weight Average Molecular Weight

AbstractCharge transfer interactions in mixtures of poly(9-vinylcarbazole) with three nitro compounds (4,4′dinitrodibenzyl, ethyl 3,5-dinitrobenzoate and 2,2′,4,4′-tetranitrodibenzyl) were examined. GPC shows an increase of apparent polymer weight average molecular weight (MW) in mixtures compared with pure PVK. Electron acceptors show upfield 1H-NMR shifts for all mixtures. The equilibrium association constants (k) calculated from the Benesi-Hildebrand equation are 0.511, 1.371, and 1.868 L mol−1 for PVK blends with DNDB, DNBE and TNDB, respectively. Shifts of (−NO2) stretch vibrations in mixtures support charge transfer complex formation between PVK chains and electron acceptors The ability to accept electrons decreases: TNDB>DNBE>DNDB.

Determination of phenothiazines by charge-transfer complex formation with chloranilic acid

Talanta ◽  
1986 ◽  
Vol 33 (2) ◽  
pp. 111-114 ◽  
Author(s):  
N.A. Zakhari ◽  
M. Rizk ◽  
F. Ibrahim ◽  
M.I. Walash
Keyword(s):  
Charge Transfer ◽  
Complex Formation ◽  
Charge Transfer Complex ◽  
Chloranilic Acid

scholarly journals Simple Methods for the Spectrophotometric Determination of Carvedilol

2012 ◽  
Vol 2012 ◽  
pp. 1-6
Author(s):  
Divya N. Shetty ◽  
B. Narayana
Keyword(s):  
Charge Transfer ◽  
Complex Formation ◽  
Confidence Level ◽  
Charge Transfer Complex ◽  
Condensation Reaction ◽  
Pharmaceutical Preparations ◽  
Molar Absorptivity ◽  
Spectrophotometric Methods ◽  
Accuracy And Precision

Two simple spectrophotometric methods are described for the determination of carvedilol (CAR). Method A is the condensation reaction of CAR with p-dimethylaminobenzaldehyde (PDAB), and the reaction mixture exhibits maximum absorbance at 601 nm. Method B is based on the charge transfer complex formation of CAR with p-chloranil; the color developed is measured at 662 nm. The calibration graphs are found to be linear over 50.00–250.00 and 20.00–100.0 μg mL−1 with molar absorptivity values of 0.92×103 and 0.257×104 L mol−1cm−1 for CAR-PDAB and CAR-p-chloranil, respectively. Statistical comparisons of the results are performed with regard to accuracy and precision using Student’s t-test and F-test at 95% confidence level. The methods are successfully employed for the determination of CAR in pharmaceutical preparations, and the results agree favorably with the reference and proposed methods.

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