Template Synthesis of Decaphyrin without Meso-Bridges: Cyclo[10]pyrrole.
An acenaphthylene-fused cyclo[10]pyrrole 1b was selectively synthesized via an oxidative coupling reaction of the corresponding 2,2'-bipyrrole with the appropriate dianion template, croconate anion. The structure of 1b as the isolated largest cyclo[n]pyrrole was elucidated by X-ray crystallographic analysis. The absorption spectrum exhibited a markedly red-shifted, intensified L band at 1982 nm, which was interpreted by application of Michl's perimeter and Gouterman's 4-orbital models, supported by magnetic circular dichroism (MCD) data and theoretical calculations.
Graduate School of Science and Engineering, Ehime University , Matsuyama 790-8577, Japan.
Tetsuo
T
Okujima
Graduate School of Science and Engineering, Ehime University , Matsuyama 790-8577, Japan.
Chie
C
Ando
Faculty of Textile Science and Technology, Shinshu University , Ueda 386-8567, Japan.
Saurabh
S
Agrawal
Graduate School of Science and Engineering, Ehime University , Matsuyama 790-8577, Japan.
Hiroki
H
Matsumoto
Advanced Research Support Center, Ehime University , Matsuyama 790-8577, Japan.
Shigeki
S
Mori
Graduate School of Science and Engineering, Ehime University , Matsuyama 790-8577, Japan.
Keishi
K
Ohara
Graduate School of Engineering, Osaka University , Suita 565-0871, Japan.
Ichiro
I
Hisaki
Graduate School of Science and Engineering, Ehime University , Matsuyama 790-8577, Japan.
Takahiro
T
Nakae
Graduate School of Science and Engineering, Ehime University , Matsuyama 790-8577, Japan.
Masayoshi
M
Takase
Graduate School of Science and Engineering, Ehime University , Matsuyama 790-8577, Japan.
Hidemitsu
H
Uno
Faculty of Textile Science and Technology, Shinshu University , Ueda 386-8567, Japan.
Nagao
N
Kobayashi