A new interesting category of higher thermally stable polyazomethines containing ferrocene in the polymers main chain 6a–e was synthesized by solution-polycondensation reaction of 1-(m-formylphenyl)-1

A new interesting category of higher thermally stable polyazomethines containing ferrocene in the polymers main chain 6a–e was synthesized by solution-polycondensation reaction of 1-(m-formylphenyl)-1

A new interesting category of higher thermally stable polyazomethines containing ferrocene in the polymers main chain 6a–e was synthesized by solution-polycondensation reaction of 1-(m-formylphenyl)-1

A new interesting category of higher thermally stable polyazomethines containing ferrocene in the polymers main chain 6a–e was synthesized by solution-polycondensation reaction of 1-(m-formylphenyl)-1

A new series of photoactive polymers were synthesized by condensing polymerization of different diarylidine monomers 1a,b–3a,b with 1,2-bis(chloromethylsilyl)ethane in Tetrahydrofuran and in the presence of butyllithium. These polymers were characterized by elemental and spectral analyses. The optical properties of these polymers were comparable to those of parent monomer units, by using ultraviolet–visible absorption and emission in solution, and they possessed the physical characteristics of macromolecules. In addition, the thermal properties of these polymers were evaluated by thermogravimetric analysis and DSC measurements. These polymers are thermally stable up to 207 °C except for polymer P3a up to 180 °C and underwent degradation thereafter. The polymers exhibit glass transition temperatures lower than 0 °C except for polymer P3a where its Tg was at 35 °C. The molar masses of all polymers were determined by gel permeation chromatography (GPC), and all polymers have high molar masses. The starting monomers 1a, 2a, and 3b were crystallized and their structures in the crystal were determined by X-ray diffraction. The polymerizable points were found not to be in proper spatial relation to allow for solid-state polymerization.

A new series of photoactive polymers were synthesized by condensing polymerization of different diarylidine monomers 1a,b–3a,b with 1,2-bis(chloromethylsilyl)ethane in Tetrahydrofuran and in the presence of butyllithium. These polymers were characterized by elemental and spectral analyses. The optical properties of these polymers were comparable to those of parent monomer units, by using ultraviolet–visible absorption and emission in solution, and they possessed the physical characteristics of macromolecules. In addition, the thermal properties of these polymers were evaluated by thermogravimetric analysis and DSC measurements. These polymers are thermally stable up to 207 °C except for polymer P3a up to 180 °C and underwent degradation thereafter. The polymers exhibit glass transition temperatures lower than 0 °C except for polymer P3a where its Tg was at 35 °C. The molar masses of all polymers were determined by gel permeation chromatography (GPC), and all polymers have high molar masses. The starting monomers 1a, 2a, and 3b were crystallized and their structures in the crystal were determined by X-ray diffraction. The polymerizable points were found not to be in proper spatial relation to allow for solid-state polymerization.

Novel Friedel-Crafts polyketones containing naphthalene moiety were synthesized via the electrophilic Friedel-Crafts polycondensation method. The desired polyketones were obtained by the interaction of newly synthesized dinaphthylidenecycloalkanone monomers with different aliphatic and aromatic diacid chlorides. The structures of new monomers and polymers were confirmed by elemental and spectral analyses, besides X-ray single crystal data for the two new monomers. The new polyketones were characterized by solubility, viscometry, thermal properties, scanning electron microscopy and antimicrobial activity test. All the polyketones were soluble in formic acid as protonic solvent giving yellowish to brown colors. Some of the polyketones were partially soluble in n-hexane, benzene and chloroform. The thermal properties of those polymers were evaluated by TGA; DTG and DTA measurements. The desired polyketones have high thermal stability at T10 except polymer 3b which have low T10 value. FDT for all polyketones is nearly completed at around 522–677◦C. The morphological properties of polyketone 2b were tested by SEM measurements. The synthesized monomers and polymers were screened for their antibacterial and antifungal activities. They showed a moderated antibacterial activity against tested Gram-negative and Gram-positive bacteria and no significant influence against the selected fungi species except monomer 1b and polymers 2a, 3b.

Novel Friedel-Crafts polyketones containing naphthalene moiety were synthesized via the electrophilic Friedel-Crafts polycondensation method. The desired polyketones were obtained by the interaction of newly synthesized dinaphthylidenecycloalkanone monomers with different aliphatic and aromatic diacid chlorides. The structures of new monomers and polymers were confirmed by elemental and spectral analyses, besides X-ray single crystal data for the two new monomers. The new polyketones were characterized by solubility, viscometry, thermal properties, scanning electron microscopy and antimicrobial activity test. All the polyketones were soluble in formic acid as protonic solvent giving yellowish to brown colors. Some of the polyketones were partially soluble in n-hexane, benzene and chloroform. The thermal properties of those polymers were evaluated by TGA; DTG and DTA measurements. The desired polyketones have high thermal stability at T10 except polymer 3b which have low T10 value. FDT for all polyketones is nearly completed at around 522–677◦C. The morphological properties of polyketone 2b were tested by SEM measurements. The synthesized monomers and polymers were screened for their antibacterial and antifungal activities. They showed a moderated antibacterial activity against tested Gram-negative and Gram-positive bacteria and no significant influence against the selected fungi species except monomer 1b and polymers 2a, 3b.

Novel Friedel-Crafts polyketones containing naphthalene moiety were synthesized via the electrophilic Friedel-Crafts polycondensation method. The desired polyketones were obtained by the interaction of newly synthesized dinaphthylidenecycloalkanone monomers with different aliphatic and aromatic diacid chlorides. The structures of new monomers and polymers were confirmed by elemental and spectral analyses, besides X-ray single crystal data for the two new monomers. The new polyketones were characterized by solubility, viscometry, thermal properties, scanning electron microscopy and antimicrobial activity test. All the polyketones were soluble in formic acid as protonic solvent giving yellowish to brown colors. Some of the polyketones were partially soluble in n-hexane, benzene and chloroform. The thermal properties of those polymers were evaluated by TGA; DTG and DTA measurements. The desired polyketones have high thermal stability at T10 except polymer 3b which have low T10 value. FDT for all polyketones is nearly completed at around 522–677◦C. The morphological properties of polyketone 2b were tested by SEM measurements. The synthesized monomers and polymers were screened for their antibacterial and antifungal activities. They showed a moderated antibacterial activity against tested Gram-negative and Gram-positive bacteria and no significant influence against the selected fungi species except monomer 1b and polymers 2a, 3b.

A new series of heteroaromatic polyazomethines containing 1,8-naphthyridine moieties in the polymer backbone were synthesized with a solution polycondensation technique. A new heteroaromatic monomer containing 1,8-naphthyridine moieties (4-ethoxy-2,7-dicarboxaldehyde- 1,8-naphthyridine) was synthesized with an analogous synthetic sequence and confirmed by elemental and spectral data. The resulting polymers were characterized by elemental, spectral analyses, solubility and viscometry measurements. All the synthesized polyazomethines had better solubility in polar aportic solvents. The thermal properties of those polymers were evaluated by thermogravimetric analysis, differential thermogravimetry, and differential thermal analysis measurements and correlated to their structural units. All the polymers had nearly similar maximum polymer decomposition temperatures, which were in the range 557–577
C. A very large difference between the glass transitions (92–222
C) was observed. In addition, with gel permeation chromatography, the molecular weight determination of selected examples of those polymers was evaluated. The values of the average molecular weight for polyazomethines 7b and 7c were 34,914 and 24,859, respectively. On the other hand, the biological screening of all of the synthesized polyazomethines was performed in variety of bacteria and fungi. Most of the polyazomethines showed a significant influence against Gram-negative bacteria. The minimum inhibitory concentration of the most active polymers was 0.05 mg/mL. VC 2012 Wiley Periodicals, Inc. J Appl Polym Sci 126: 2–12, 2012