Aniline Lab Report

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EXPERIMENTAL 2.1 Materials PtCl2 (98%) were obtained from Aldrich. Sodium borohydride (NaBH4) purchased from Merck, Tetrahydrofuran (THF), Distilled aniline (Purity 99.5%), Ammonium persulfate (APS), Hydrochloric acid (HCl) was purchased from Scharlau, Spain. 2.2 Synthesis of PANI Distilled aniline (10 mM) was added into 10 ml solution of HCl (1.0 M) under stirring condition for 10 min, Ammonium persulphate (10 mM) was added into 30 ml HCl (1.0 M) and stirred for 30 min to yield homogeneous transparent solution. This solution is called APS solution and it oxidizes the monomer of aniline. The solution of aniline monomer was put in ice bath so that the temperature would keep up at 4 C. After that APS solution was added drop-wise (5 drop/min)…show more content…
PtCl2 and sodium borohydride (NaBH4) were used as an oxidant and reduction agent. As shown in Figure 1, the polymerization was carried out in a three-necked round-bottom flask set on a stirrer, a nitrogen inlet and a condenser. Typically, PtCl2 (5 mM) and NaBH4 (0.5 mM) were each suspended in 1.0 M HCl and deionized water respectively heated to 40 °C for 4 h with vigorous stirring and kept in an ultrasonication bath for 4 h. 5 mM distilled aniline was dissolved in 5 ml HCl (1.0 M) and stirred for 30 min. The solution of PtCl2 was added drop-wise to aniline monomer solution and ultrasonicated for 4 h. APS (5.0 mM) was dissolved in 15 ml of HCl (1.0 M) and added to this solution and stirred for 1 min in a reaction vessel that was held at a temperature of 0-5 C. After that the solution color turned light green, the solution of NaBH4 was added to this solution synchronously. Further, the solution was allowed to stand for more than 2 h where the color of the solution changed from light green toward dark
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