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Quenching Platinum Octaethylporphine Phosphorescence in Solution by Poly(ferrocenylsilane) †
Author(s) -
Yang Jian,
Cyr Paul W.,
Wang Yishan,
Soong Ronald,
Macdonald Peter M.,
Chen Liusheng,
Manners Ian,
Winnik Mitchell A.
Publication year - 2006
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1562/2005-06-21-ra-587
Subject(s) - phosphorescence , quenching (fluorescence) , platinum , ferrocene , kinetics , toluene , photochemistry , chemistry , luminescence , polymer , materials science , polymer chemistry , fluorescence , electrochemistry , electrode , catalysis , organic chemistry , optoelectronics , physics , quantum mechanics
We describe experiments that determine the quenching kinetics by poly(ferrocenylsilane) (PFS) for platinum octaethylporphine (PtOEP) phosphorescence in toluene solution. The phosphorescence quenching process was interpreted in terms of diffusion‐controlled kinetics. Pulsed‐gradient spinecho nuclear magnetic resonance (PGSE NMR) and dynamic light scattering (DLS) were used to characterize the diffusion behavior of PFS and PtOEP in toluene solution. We found that the ferrocene group present in the repeat unit of polymer backbone is a good quencher for PtOEP phosphorescence. Quenching by the polymer involves the entire PFS polymer chain instead of individual ferrocene groups. The intrinsic quenching ability of PFS was found to be higher than that of a model compound, Bu‐FS, that contains a single ferrocene group.