Abstract
By column chromatography technique, heraclenin, a linear furano-coumarin with molecular formula C16H14O5 was isolated from the root parts of the plant Prangos pabularia. Various techniques, like X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), optical microscopy (OM), UV–Visible spectroscopy and photoluminescence (PL) were used to study structural and optical properties of the isolated compound. The XRD analysis of the compound predicts its structure to be orthorhombic. The melting point of the compound was found to be 112–114°C. From SEM and optical images, the compound was found to be comprising of large micro crystals and these exhibit irregular surface morphologies. UV–vis spectral studies predicted low absorbance by the compound in the entire visible range. The compound exhibited indirect allowed and forbidden indirect allowed transitions with optical band gap (Eg) around 3.67eV and 3.91eV. PL studies showed good emission in visible region at certain wavelengths. These properties of the compound can be exploited for its application in optoelectronics.
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