Abstract
The UV-vis absorption, MCD and fluorescence spectra of phthalocyaninatosilicon ( SiPc ) covalently linked to one or two TEMPO radicals have been studied in comparison with those of (dihydroxy) SiPc . The electronic absorption and MCD spectra show little change on substitution of TEMPO radicals, indicating that the electronic interaction between excited singlet SiPc (1 SiPc *) and doublet TEMPO (2 TEMPO ) is very weak or non-existent. In contrast, fluorescence quantum yields decrease markedly with increasing number of TEMPO radicals. This result is interpreted reasonably by assuming that the decay from 1 SiPc * to excited triplet SiPc (3 SiPc *) partially becomes a spin-allowed transition owing to the interaction between 3 SiPc * and 2 TEMPO .
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.
