title: Synthesis and Characterization of an Iridium Triphyrin Complex.
abstract: A sandwich complex of iridium(III) benzotriphyrin (2) has been synthesized from free-base benzotriphyrin (1) and [IrCl(cod)]2(COD = 1,5-cyclooctadiene). The COD ring was transformed from 1,5-COD to an η1,η3-C8H12unit as a π-allyl ligand associated with the valence change of iridium from IrIto IrIII, as revealed by X-ray diffraction analysis. The Soret-like band of 2 was blue-shifted and broadened compared with that of 1, indicating strong electronic interactions between triphyrin and the iridium ion. Compound 2 also showed very broad absorption in the range of 500-800 nm, which can be assigned to a mixture of Q and metal-to-ligand charge-transfer bands.
authors.affiliation: Graduate School of Materials Science, Nara Institute of Science and Technology , 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan.
authors.forename: Songlin
authors.initials: S
authors.lastname: Xue
authors.affiliation: Department of Physical Science and Materials Engineering, Iwate University , 4-3-5 Ueda, Morioka 020-8551, Japan.
authors.forename: Daiki
authors.initials: D
authors.lastname: Kuzuhara
authors.affiliation: Graduate School of Materials Science, Nara Institute of Science and Technology , 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Aratani
authors.affiliation: Graduate School of Materials Science, Nara Institute of Science and Technology , 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan.
authors.forename: Hiroko
authors.initials: H
authors.lastname: Yamada