Synthesis and characterization of oligosalicylaldehyde‐graft‐oligoaniline and its beginning oligomers

Abstract

ABSTRACT:Conjuge bonding oligosalicylaldehyde-graft-oligoaniline (OSA-graft-OA) was synthesized from the polycondensation reaction of oligosalicylaldehyde (OSA) with oligoaniline (OA). There were various functional groups such as OOH, ONH and OCHAN in the structure of the graft cooligomer. The physical properties of graft-cooligomers such as melting temperature and solubility were studied: number-average molecular weight, mass-average molecular weight, and a polydispersity index of OA, OSA, and fractions of the graft cooligomers [(OSA-graft-OA)-I] and [(OSA-graft-OA)-II] were found to be 740, 780 g mol Ϫ1 ,1.05; 3700, 5990 g mol Ϫ1 , 1.62; 990, 2770 g mol Ϫ1 , 2.80 and 1300, 4100 g mol Ϫ1 , 3.15, respectively. The FTIR and UV-Vis spectra of the graft cooligomer were compared with those of beginning oligomers. The spectral analyses results showed that the OSA-graft-OA synthesized from the polycondensation reaction of aromatic amine with aldehyde that have long oligophenol macromolecule bonded each other with an azomethine bridge through oligophenylamine side chains. The thermal stability of the graft cooligomer and oligomers were measured by thermogravimetric analysis (TG) under an air atmosphere. According to TG analyses, the carboneous residues of the [(OSA-graft-OA)-I) (soluble in ethanol) and (OSA-graft-OA)-II) (soluble in toluene)] were 23 and 40%, respectively, at 1000°C. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 218 -226, 2002

<b>Synthesis and characterization of thermally stable oligomer-metal complexes of copper(II), nickel(II), zinc(II) and cobalt(II) derived from oligo-<i>p</i>- nitrophenylazomethinephenol</b>

“…At the FT-IR spectra of ONPAP and oligomer-metal complexes, vibration bands of azomethine were observed at 1629 cm -1 and 1600-1605 cm -1 respectively. As a result of coordination of the azomethine nitrogen atom with metal ion, the shifts in the complexes are towards to lower values [4]. In the oligomer metal complexes, the bands in the 624-620 cm -1 and 432-420 cm -1 ranges can be attributed to the M-N and M-O stretching [5].…”

“…Catalytic activity of polymer metal complexes was studied by Vinodkumar and Mathew [3]. Antimicrobial activities of Cu(II), Co(II), Zn (II) Pb (II) oligomer metal complexes was studied by Kaya et al [4][5][6]. Thermal properties of polymer metal complexes was studied by Gad et al [7,8], Sebastian et al [9] and Mart et al [10].…”

Synthesis, Characterization, and Optimum Reaction Conditions of Oligo-3-Aminopyridine and its Schiff Base Oligomer

“…[1][2][3][4][5][6][7][8] The halogen and sulfur derivatives of oligophenols were used to prepare flame-resistant composite materials such as in lead collecting battery cathodes. [9][10][11][12] Nowadays, despite these advantages, the use of bifunctional oligophenols is limited. Schiff bases derived from the salicylaldehydes are well known polydentate ligands, able to form coordination compounds in deprotonated or neutral forms.…”

Novel electroactive aromatic polyamide with oligoanilines and azo groups in the backbone: synthesis, characterization and dielectric properties

“…By modifying conventional processable polymers with oligoanilines via covalent bond, a series of novel functional polymers have been created, which could avoid the drawbacks of agglomeration and phase separation in PANI/insulating polymer blends prepared by physical mixing methods. Much effort has been made for chemical synthesizing polymers, such as graft [17,18], alternating [19][20][21][22], and block-like [23,24] polymers.…”