Abstract
Heraclenin (C16H14O5), a linear furanocoumarin, was isolated from the ethyl acetate extract of the roots of Prangos pabularia. The compound was characterized using x-ray diffraction (XRD), scanning electron microscopy (SEM), optical microscopy, ultraviolet (UV)–visible, and photoluminescence (PL) measurements. Structural analysis confirmed the orthorhombic structure of the system. Exploration by SEM and optical images predicted that the compound contains microcrystals with irregular morphology. From UV–visible spectroscopy, high transmission was displayed by these crystals in the entire visible range. The optical band gap (Eg) was found to be around 3.91 eV and exhibited indirect allowed transitions. Photoluminescence data showed good emission at certain wavelengths in the visible region. The observed optical properties could be due to intramolecular charge transfer (ICT) when excited by any suitable light. The present properties of the compound can be explored for use in optoelectronics and as fluorophores in biological imaging applications.
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