Abstract
Two naphthalenediimide (NDI)-C60 dyads that show strong absorption of visible light were prepared as heavy atom-free organic triplet photosensitizers. Alkylamino substituted NDI was used as the light-harvesting antennas and the C60 unit was used as spin converter for the intersystem crossing (ISC) from singlet excited state to triplet excited state. Upon visible light photoexcitation, triplet excited states of the dyads are populated (lifetime is up to 90.1 μs). Nanosecond time-resolved transient difference absorption spectroscopy indicated that the triplet excited state of the dyads is localized on either the NDI or the C60 unit. As a proof of concept, the dyads are used as heavy-atom-free organic triplet photosensitizers for triplet–triplet annihilation based upconversion. C60-organic chromophore dyads can be used as a general molecular structural motif of heavy-atom-free organic triplet photosensitizers, for which the photophysical properties can be readily changed by using different light-harvesting antennas, and the ISC property of these dyads is predictable.
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.
