A core-expanded subphthalocyanine analogue with a significantly distorted conjugated surface and unprecedented properties.
The introduction of a seven-membered-ring unit in the place of a five-membered-ring unit in the structure of subphthalocyanine resulted in significant distortion of the bowl-shaped structure of the conjugated molecule as well as the following unprecedented properties: the preferential formation of the axially fluoro substituted species, the fluttering-dynamic-motion-induced rapid exchange of P and M enantiomers, markedly split Q-band absorption, and a clear difference in the ring-current effects arising from the convex and concave surfaces.
Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578 (Japan). ssoji@m.tohoku.ac.jp.
Soji
S
Shimizu
Shota
S
Nakano
Ayaka
A
Kojima
Nagao
N
Kobayashi
aromaticity; conjugation; convex-concave surfaces; ring contraction; ring expansion