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Sonication-assisted supramolecular nanorods of meso-diaryl-substituted porphyrins

Taku Hasobe1, Hideaki Oki, Atula S D Sandanayaka

  • 1School of Materials Science, Japan Advanced Institute of Science and Technology, Nomi, Ishikawa, 923-1292, Japan. t-hasobe@jaist.ac.jp

Chemical Communications (Cambridge, England)
|May 16, 2008
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All ortho–para directors, excluding halogens, are activating groups. These groups donate electrons to the ring, making the ring carbons electron-rich. Consequently, the reactivity of the aromatic ring towards electrophilic substitution increases. For instance, the nitration of anisole is about 10,000 times faster than the nitration of benzene. The electron-donating effect of the methoxy group in anisole activates the ortho and para positions on the ring and stabilizes the corresponding...