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Title
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Synthesis and characterization of novel poly(amide-ether)s bearing imidazole pendants: study of physical and optical properties
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Type
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JournalPaper
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Keywords
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Poly(amide-ether) , Direct polycondensation , Thermal properties, Fluorescent , Solubility
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Abstract
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Two new para-linked diether-diamines, bis(4-(4-amino-2-(4,5-diphenyl- 1H-imidazol-2-yl)phenoxy) phenyl)methanone and bis(4-(4-amino-2-(4,5-diphenyl- 1H-imidazol-2-yl)phenoxy) phenyl)hexafluoropropane, bearing two ortho-linked phenyl-substituted imidazole pendants and trifluoromethyl groups were synthesized by the nucleophilic chlorodisplacement reaction of the synthesized 2-(2-chloro-5- nitrophenyl)-4,5-diphenyl-1H-imidazole with 4,40-dihydroxybenzophenone or 4,40- (hexafluoroisopropylidene)diphenol in refluxing DMAc in the presence of potassium carbonate. These diamines were utilized to prepare a series of novel poly(amideether) s (PAEs) via direct phosphorylation polycondensation with aliphatic and aromatic dicarboxylic acids. The polymeric samples were readily soluble in a variety of organic solvents and formed low-colored and flexible thin films via solution casting. These polymers showed glass-transition temperatures (Tgs) between 204 and 308 C. Thermal behaviors of the PAEs were characterized by thermogravimetric analysis, and the 10 %weight loss temperatures were found to be in the range of 330–450 C in N2. The PAEs exhibited fluorescence emission in solution and in solid state with maxima around 423–494 nm and with the quantum yields in the range of 6–28 %.
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Researchers
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Mehdi Taghavi (Fourth Researcher), Seyed Mojtaba Amininasab (Third Researcher), Samaneh Sharifi (Second Researcher), Mousa Ghaemy (First Researcher)
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