عنوان المقالة:تحضير، تشخيص ودراسة تاثير حلقة ثلاثي فنيل امين المعوضة على الخصائص الحرارية والبصرية للبولي اميد الاروماتي الجديد الحامل للحلقة Synthesis, Characterization, Effect of Triaryl Ring Substituents Groups on Thermal and Spectral Properties of New Soluble Triphenylamine-Based Aromatic Polyamides
AZHAR KAMIL RASHID, ROSIYA BINTI YAHYA and PHANG SOOK WAI
Abstract
Three new triphenylamine-containing aromatic diacid monomers, 4,4'-dicarboxy-4'’-isopropyl-triphenylamine (Ma), 4,4'-dicarboxy-2’4'’-
dimethyl-triphenylamine (Mb, 4,4'-dicarboxy-4'’-ethyltriphenylamine (Mc) were successfully synthesized via the aromatic nucleophilic
fluoro-displacement reaction of 4-fluorobenzonitrile with aniline-derivatives using sodium hydride as the base, followed by alkaline
hydrolysis of the dinitrile intermediates (Ia), (Ib), (Ic). A series of poly(amine-amide)s were prepared by the direct phosphorylation
polycondensation from the newly synthesized diacid monomers with various aromatic diamines. FTIR, 1H and 13C NMR spectroscopic
techniques were used to identify the chemical structures of the dicyano intermediates, the carboxylic acid monomer and the resultant
poly(amine-amide)s. These aromatic poly(amine-amide)s were found to be readily soluble in a variety of organic solvents and could
afford strong and tough films via solution casting. They exhibited excellent thermal stability associated with high glass transition temperatures
(Tg = 248.32-290.46 ºC) and 10 % weight loss temperatures in excess of 522 ºC in nitrogen. In dilute N-methyl pyrrolidone solution, these
polymers exhibited a medium to strong photoluminescence in the blue region at (425-443) nm. Cyclic voltammetry of the poly(amineamide)
s films cast onto an ITO-coated glass substrate in dry acetonitrile containing 0.1 M of tetrabutylammonium perchlorate (TBAP) as
an electrolyte exhibited one oxidation redox couples (Eonset) at (1.30-1.37) V versus Ag/AgCl and revealed electrochromic characteristics
with a colour change from pale yellow to blue at applied potentials switched between 0.0 and 1.6 V.
ازهر كامل رشيد | Azhar Kamil Rashid | 6889