Abstract
Mercapto-substituted hypocrellin B derivatives (MHBDs), display, in the absence of electron donors, a characteristic absorbance peak and electron spin resonance (ESR) signal, which can be attributed to the semiquinone radical anion, formed by intermolecular electron transfer. In the presence of electron donors, the amplitude of the ESR signal increases significantly. Irradiation of MHBDs in the presence of oxygen leads to the generation of superoxide radicals, which may be registered by the spin trapping technique: the formation mechanism of superoxide in the absence or presence of electron donors is discussed. The free radicals and superoxide radicals formed on photoirradiation of MHBDs may play a hitherto unrecognized role in biological processes.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Photochemistry & Photobiology, A: Chemistry
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
