Abstract
Intermolecular charge-transfer (CT) complexes formed from the reaction of bis(4-amino-N-ethyl-1,8-naphthalimide) amine (BAENA) with some phenolic acceptors such as 4-aminophenol (4-AP), 4-methylphenol (4-MP) and 4-nitrophenol (4-NP) have been studied in methanol at room temperature. The isolated products have been discussed using (UV-Vis., mid infrared, and H-1-NMR) spectra and thermal measurements (TGA/DTG) as well as elemental analysis. The photometric titration curves for the reactions indicated that the data obtained refer to 1: 2 charge transfer complexes [(BAENA)(4-AP)(2)], [(BAENA)(4-MP)(2)] and [(BAENA)(4-NP)(2)] were associated. The infrared and H-1-NMR spectra interpreted the mode of CT interaction formed with the hydrogen bonding exist between a proton (-OH) of phenolic acceptor and the two amine -NH2 group of donor attached with 4-amino-N-ethyl-1,8-naphthalimide compound. The activation thermodynamic parameters Delta E, Delta H, Delta S and Delta G were obtained from the DTG diagrams by using Coats-Redfern method. The polymer composites of [(BAENA)(acceptor)(2)] charge transfer complex with polystyrene have prepared by weight ratio (1(charge transfer complex):6(polystyrene)), respectively. The polymer composites exhibit semi conducting behavior having thermal activation energies in the range of 0.34 to 0.62 eV at different temperature.