Ruthenium(iv) N-confused porphyrin μ-oxo-bridged dimers: acid-responsive molecular rotors†
Shigeki
Mori, 
b
Jun Tae
Song,
a
Tatsumi
Ishihara,
a
Takaaki
Miyazaki,
*a
Masatoshi
Ishida
*a
and
Hiroyuki
Furuta
*a
b
Jun Tae
Song,
a
Tatsumi
Ishihara,
a
Takaaki
Miyazaki,
*a
Masatoshi
Ishida
*a
and
Hiroyuki
Furuta
*a
Abstract
Ruthenium(IV) N-confused porphyrin μ-oxo-bridged complexes were synthesized via oxidative dimerization of a ruthenium(II) N-confused porphyrin complex using 2,2,6,6-tetramethylpiperidine 1-oxyl. The deformed core planes in the dimers conferred a relatively high ring rotational barrier of ca. 16 kcal mol−1. Rotation of the complexes was controlled by protonating the peripheral nitrogen.
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