New Derivative Benzothiazole Suspend Diphenyleamine Based Aromatic Polyamides as Electrochromic Light Emitting Devices

Azhar Kamil Rashid

Department of Chemistry, College of Education for Pure Science/Ibn Al-Haitham, University of Baghdad, Baghdad, Iraq

Corresponding author: Tel: +964 7714794280; E-mail: azhar_almasody@yahoo.co.uk

Abstract

In this work, a set of some substituted aromatic polyamides containing (benzothiazole)diphenylamine moieties (P1-P5) was prepared via the phosphorylation polycondensation technique from the reaction of several aromatic dicarboxylic acids with synthesized N,N-bis(4-aminophenyl)2-amine-6-methoxybenzothiazol (M). It was prepared from the cesium fluoride-mediated double N-arylation reaction of 6-methoxybenzothiazol (a) with p-fluoronitrobenzene to form dinitro intermediate (I) followed by palladium-catalyzed hydrazine reduction. FTIR, 1H and 13C NMR spectra techniques were utilized to characterize the chemical structures of all the resultant intermediates and polyamides. Thermal analysis revealed that the synthesized polyamides showed perfect thermal stability and superior glass transition temperatures (Tg). Dilute solutions of these polyamides in N-methyl pyrrolidone (10-5 M) showed good optical properties where exhibited intensive photoluminescence in the region of blue colour. Cyclic voltammograms of the synthesized polymers membrane molding onto the basis of ITO-plated glass in the spesial electrolyte contains 10-1 M of tetrabutylammonium perchlorate(TBAP) in dry CH3CN which exhibited one oxidation redox wave couples.

Keywords

Polyamides, Photoreceptor, Electrochromic, Photoluminescence.

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