UV-vis, IR spectra and thermal studies of charge transfer complex formed between poly(amidoamine) dendrimers and iodine.
The intermolecular charge-transfer (CT) complexes formed between two poly(amidoamine) dendrimers (PAMAM) from zero (D1) and second generation (D2) as donor and iodine as sigma-acceptor have been studied spectrophotometrically in the chloroform medium. The suggested structures of the solid iodine charge-transfer complexes investigated by several techniques using elemental analysis, mid infrared spectra, and thermal analysis (TGA and DTG) of the solid CT-complexes along with the photometric titration curves for the reactions. The results indicate the formation of two CT-complexes [(D1)]-I(2) and [(D2)]-2I(2) with acceptor:donor molar ratios of 1:1 and 1:2, respectively. The kinetic parameters (non-isothermal method) for their decomposition have been evaluated by graphical methods using the equations of Horowitz-Metzger (HM) and Coats-Redfern (CR).
Refat
Moamen S
MS
Chemistry Department, Port Said, Suez Canal University, Egypt. msrefat@yahoo.com
El-Didamony
Akram M
AM
Grabchev
Ivo
I
D002151:Calorimetry; D050091:Dendrimers; D007455:Iodine; D007700:Kinetics; D008958:Models, Molecular; D008968:Molecular Conformation; D011073:Polyamines / Q000737:chemistry*; D013053:Spectrophotometry / Q000379:methods; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013816:Thermodynamics
D050091:Dendrimers; C104700:PAMAM Starburst; D011073:Polyamines; D007455:Iodine