Abstract
The present paper was discussed to find out the public perception of the nature of charge transfer bonding between the first generation of poly(propylene amine) dendrimer (PPD) and like each of p and sigma-acceptors. Iodine and picric acid (PA) were chosen because of them considered the most common of the receptors in the field of charge transfer complexes. The charge-transfer interaction of the PPD electron donor and the PA pi-electron acceptor has been studied in CHCl3. The resulted data refereed to the formation of the new CT-complex with the general formula [(PPD)(PA)(2)]. The 1: 2 stoichiometry of the reaction was discussed upon the on elemental analysis and photometric titration. On the other hand, the 1:21/2 iodine-PPD pentaiodide (I-5(-)) charge-transfer complex has been studied spectrophotometrically in chloroform at room temperature with general formula [(PPD)](+) I-5(-). The electronic absorption bands of I-5(-) are observed around similar to 360 and similar to 290 nm. Raman laser spectrum of the brown solid pentaiodide complex has two clearly vibration bands at 146 and 111 cm(-1) due to symmetric stretching v(s)(I-I) outer and inner bonds, respectively of the linear I-5(-) ion with D-infinity h point group. The electronic absorptions, infrared and Raman laser spectra, thermal analysis (TG/DTG/DSC), photometric titrations as well as elemental analysis of the resulted picric acid and iodine-PPD complexes were discussed.