Abstract
A series of monotailed porphyrins, zinc 5-{4-[ω-(1-adamantaneamino)alkyloxy]phenyl}-10,15,20-triphenyl porphyrinate (ZnPCnA, n = 4, 5, 6), were synthesized in which the porphyrin moiety was connected to 1-adamantanamine via a flexible hydrocarbon chain. It was found that photoinduced electron transfer could occur between these porphyrin compounds and mono-6-p-nitrobenzoyl-β-cyclodextrin (NBCD) in aqueous solution. Detailed steady-state and time-resolved fluorescence measurements revealed two pathways of electron transfer, i.e., the electron transfer between the free donor and free acceptor in solution (dynamic quenching), and the electron transfer between the donor and acceptor bound in a supramolecular complex (static quenching). In these two pathways, the static quenching was found to be highly efficient and dominant in the presence of NBCD. The remarkably large electron-transfer rate (kSET, ca. 1.0 × 109 s-1) of the static quenching was found to be very close to that of a covalently linked porphyrin−nitrobenzene dyad.
Sign-in/Register to access full text options 
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 callDisclaimer: 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.
