Abstract
The photoreduction yields of methylviologen and various alkylated homologues in zeolite-X, Y and A were determined at 77 K in the absence of any reducing counteranion. Upon irradiation at 77K, dehydrated samples turned light blue and a single line ESR spectrum was observed with a g-factor identical to that of the methylviologen radical cation. Samples that were not dehydrated produced ESR spectra about 10% as intense as those that had the water removed. The photoreduction yield was largest in zeolite Y, less in zeolite X which has more cations and hence more crowding in the cages, and very small in zeolite A which has much smaller cages. The electron donor in these systems is believed to be the anionic aluminosilicate framework of the host zeolite.
Published Version
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 call