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Strategic Synthesis of 2,6‐Pyridylene‐Bridged β‐to‐β Porphyrin Nanorings through Cross‐Coupling
Author(s) -
Song Jianxin,
Kim Pyosang,
Aratani Naoki,
Kim Dongho,
Shinokubo Hiroshi,
Osuka Atsuhiro
Publication year - 2010
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200903177
Subject(s) - chromophore , porphyrin , coupling (piping) , excited state , pyridine , scheme (mathematics) , computer science , energy transfer , chemistry , materials science , nanotechnology , photochemistry , chemical physics , physics , mathematics , atomic physics , organic chemistry , metallurgy , mathematical analysis
The bridge determines the size of the loop? Palladium‐catalyzed cross‐coupling of borylporphyrins led to the construction of β‐pyridine‐bridged porphyrin nanorings in good yields (around 55–60 %; see scheme). The photophysical study revealed that these nanorings exhibit weakly coupled chromophores and longer fluorescent lifetimes, which is an apparent advantage in the process of efficient excited energy transfer.