Synthesis Of Polyaniline Substituted Dyes And The Study Of Their Electrical Conductivity
Volume 1 - Issue 5, November 2017 Edition
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Author(s)
J Obadahun, K.A. Bello, A.A Kogo, A.A. Abdelmalik, B Ayebe, P.L. Pascalina, Zubair.H.S
Keywords
Polyaniline, polyaniline substituted azo dyes, electrical conductivity
Abstract
Polyaniline substituted azo dyes were synthesized from polyaniline obtained by oxidative polymerization of aniline and different azo dyes obtained from 2-aminothiophene intermediates. Four different polyaniline substituted dyes were synthesized and there molecular weight ranges from 58,044-58,128g/mol. The melting point was observed to span from 286°C-319°C. The FT-IR bands of polyaniline substituted dyes showed absorption peaks in the range 3213.0-3242.8cm-1 due to the presence of an amino group, the benzenoid and quinoid rings for all the polyaniline substituted dyes showed in the range 1461-1487cm-1 and 1543-1595cm-1 respectively while the carbon nitrogen single bond (C-N) absorption were found in the range 1263.6-1285cm-1. The electrical conductivity measurements were obtained by employing a standard process using a programmable LCR meter at a frequency range of 200-100000Hz and the result was determined for polyaniline to be 5.957 x 10-3 S m-1. Thus electrical conductivity of synthesized dyes were observed to be within the range of 10-7-10-8 S m-1 while polyaniline substituted dyes lies within the range of 10-2-10-4 S m-1. The electrical conductivity of the dyes and polyanaline substituted dyes lies within the range of electrical conductivity for semiconductor which is between 10 12 102 S m-1.
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