Gamma radiation response of plant isolated coumarin glycoside

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• 作者：Feroz A. Mir^a ; ^{shaheen.mir2013@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; ^{famir57@yahoo.com" class="auth_mail" title="E-mail the corresponding author} ; Shakeel u Rehman^b ; Shoukat H. Khan^a
• 关键词：Coumarin ; Spectroscopy ; Chromatography ; Dosimeter ; Transition
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：127
• 期：20
• 页码：8361-8366
• 全文大小：680 K

文摘

A newly isolated compound: 7-hydroxy-8-O-β-glycosylbenzopyranone (coumarin glycoside) was obtained from Rhododendron lepidotum by column chromatography. This compound was subjected to gamma radiation of various doses. These radiated samples were characterized by Fourier transform infrared (FT-IR) spectroscopy, UV–vis spectroscopy and Photoluminescent (PL) spectroscopy. FT-IR confirms the presence of various functional groups, and a systematic variation in these bands can be observed after irradiation. From the UV–vis spectroscopy, the present compound shows an increase in absorbance with increasing radiation dose. This compound follows an indirect allowed transition with an optical band gap (E_g) of around 3.01 eV (pristine). However, with increase in radiation dose, an enhancement of observed E_g is observed. A variation in disordered energy was also observed with dose. An increase in PL emission can also be seen with radiation. The observed properties shown by this compound projects it as a potential dosimeter within the understudy dose range.