کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1238437 | 968936 | 2007 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: UV–vis, IR spectra and thermal studies of charge transfer complex formed between poly(amidoamine) dendrimers and iodine UV–vis, IR spectra and thermal studies of charge transfer complex formed between poly(amidoamine) dendrimers and iodine](/preview/png/1238437.png)
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 σ-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)]–I2 and [(D2)]–2I2 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).
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 67, Issue 1, May 2007, Pages 58–65