Synthesis and characterization of new optically active poly(azo-ester-imide)s via interfacial polycondensation |
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Authors: | Abdol R Hajipour Saeed Zahmatkesh Parniyan Roosta Arnold E Ruoho |
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Institution: | (1) Pharmaceutical Research Laboratory, College of Chemistry, Isfahan University of Technology, Isfahan, 84156, IR Iran;(2) Department of Pharmacology, University of Wisconsin, Medical School, 1300 University Avenue, Madison, WI 53706-1532, USA;(3) Department of Science, Estahban Payamenoor University, Estahban 74515/161, Fars, Iran |
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Abstract: | N,N′-Pyromelliticdiimido-di-l-amino acids (1a–1d) were prepared from the reaction of pyromellitic dianhydride with the corresponding l-amino acids in a solution of glacial acetic acid/pyridine (3:2) at refluxing temperature. 4,4′-sulfonyl bis(4,1-phenylene)
bis(diazene-2,1-diyl) diphenol, 4,4′-oxy bis(4,1-phenylene) bis(diazene-2,1-diyl) diphenol and 4,4′-methylene bis(4,1-phenylene)
bis(diazene-2,1-diyl) diphenol, were prepared from 4,4′-diamino diphenyl sulfone, 4,4′-diamino diphenyl ether, 4,4′-diamino
diphenyl methane, sodium nitrite and phenol following the general procedure of diazo coupling. Interfacial polycondensation
method was used to prepare the corresponding poly(azo-ester-imid)s (PAEI
1–12
) in biphasic solution of water/dichloromethane. The resulting polymers (PAEIs) have been obtained in high yields having good inherent viscosities (0.32–0.57 dl g−1), optical activities and thermal stabilities. |
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