Masruri

Synthesis and Characterization of Polyaniline Nanoparticle by Inverse Micelle Microemulsion Method

Polyaniline (PANI) is a conductive polymer and potential for application in the electronic device manufacturing. This paper discloses a recent strategy in synthesis polyaniline nanoparticle (NP-PANI) using inverse micelle (IM) microemulsion method, and also characterization of the provided products. The synthesis step was conducted by mixing of aniline as a polymer precursor with PEG 400, n-hexane, n-butanol, ammonium persulfate and hydrochloric acid in three different reaction times, i.e. for 2, 6, and 12 hours at 26 o C. NP-PANI was afforded as a brown powder in 2.87%, 1.97% and 2.30% yield for NP-PANI-IM-2, NP-PANI-IM-6 and NP-PANI-IM-12. The characteristic on ultra violet-visible and infrared spectra exhibited NP-PANI was formed as an emeraldine salt oligomer. Moreover, their morphology was observed through scanning electron microscopy (SEM) and showed a different range of nanoparticle size, i.e. 50-62, 68-72 and 58-62 nm for NP-PANI-IM-2, NP-PANI-IM-6 and NP-PANI-IM-12, respectively. These products open the potency application in material science.

Naturally Abundance Vanillin as Starting Material to Synthesizing 4-(4-Hydroxy-3-methoxyphenyl)-6-methyl-3,4-dihydropyrimidin-2(1H)-one

Indonesia is the second biggest producer of natural vanillin. Traditionally it was isolated from the bean of vanilla (Vanilla planifolia Andrews). This paper reports on applying vanillin as starting material for synthesizing a biologically important chemical structure 3,4-dihydropyrimidinone. The reaction was undertaken in one step following multi component reaction (MCR). Products determination was undergone using FTIR and UV-Vis spectrophotometry, and also liquid chromatography-mass spectrometry (LCMS). After purification under flash column chromatography in ethyl acetate-hexane, it was found a white solid of 4-(4-hydroxy-3-methoxyphenyl)-6-methyl-3,4-dihydropyrimidin-2(1H)-one in 67% yield with a few amount of an unreacted vanillin.