Search

Vinyl-functionalized phenanthroimidazole-based monomers were synthesized and their thermal, optical, photophysical, and electrochemical properties were investigated. The monomers exhibited high thermal stability with 5% weight loss temperatures ranging from 315 to 386 °C. Solid state ionization were found to be comparable (5.56-5.62 eV). The number average molecular weight of the polymerization product of monomer containing substituent at phenyl rings linked to C-2 position of imidazole ring was found to be 213000 Da. The values of activation energy for self-polymerization of monomers varied in the range from 86.6 to 143.8 kJ/mol (estimated by Ozawa method), and from 87.8 to 148.0 kJ/mol (estimated by Kissinger method). [ABSTRACT FROM AUTHOR]

1,8-Naphthalene imide with reactive vinyl group was synthesized by Suzuki reaction. Self-polymerization of the compound starts at 177°C as confirmed by differential scanning calorimetry. The electron affinity values of the monomer and the polymer were found to be −3.30 eV and −3.05 eV, respectively. The solid state ionization potential values of the monomer and the polymer were recorded to be 6.42 eV and 6.17 eV, respectively. The activation energy of the process was estimated using Ozawa method. It depends on the conversion degree and was found to be in the range of 136-195 kJ/mol. Pre-exponential factor values decrease during polymerization with decreasing chain mobility due to increasing molecular weight of the polymer. [ABSTRACT FROM AUTHOR]