Positron annihilation lifetime studies of changes in free volume on some biorelevant nitrogen heterocyclic compounds and their S-glycosylation.
A series of N-heterocyclic compounds was investigated by positron annihilation lifetime spectroscopy as well as Doppler broadening of annihilation radiation (DBAR) at room temperature. The results showed that the formation probability and life time of ortho-positronium in this series are structure and electron-donation character dependent, and can give more information about the structure. The DBAR provides direct information about the change of core and valance electrons as well as the number of defect types present in these compounds.
Physics Department, Faculty of Science, Kafrelsheikh University, 33516 El Gaish Street, Kafr El Sheikh, Egypt. Electronic address: kamalreyad@hotmail.com.
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Mahmoud
Chemistry Department, Faculty of Science, Kafrelsheikh University, 33516 El Gaish Street, Kafr El Sheikh, Egypt.
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Khodair
Chemistry Department, Faculty of Science, Kafrelsheikh University, 33516 El Gaish Street, Kafr El Sheikh, Egypt.
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Shaban
D004301:Doppler Effect; D004583:Electrons; D006031:Glycosylation; D006571:Heterocyclic Compounds / Q000737:chemistry / Q000528:radiation effects*; D015394:Molecular Structure; D009584:Nitrogen / Q000737:chemistry; D013057:Spectrum Analysis / Q000379:methods
D006571:Heterocyclic Compounds; D009584:Nitrogen
Doppler broadening; Heterocyclic compounds; Positron annihilation; S-glycosylation