title: Synthesis, structures, and optical and electrochemical properties of benzoporphycenes.
abstract: The first facile syntheses of free-base di- and tetrabenzoporphycenes and their metal complexes are reported, based on retro-Diels-Alder reactions of the corresponding bicyclo[2.2.2]octadiene-fused porphycenes, prepared by McMurray coupling of alpha,alpha'-diformyldipyrrole. The photophysical and electrochemical properties are analyzed based on UV/Vis absorption, magnetic circular dichroism (MCD), and fluorescence emission, lifetime and quantum yield measurements, cyclic and differential pulse voltammetry (CV and DPV) and time-dependent DFT calculations based on B3LYP geometry optimizations. Benzoporphycenes are found to be prime candidates for future use in photodynamic therapy.
authors.affiliation: Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan.
authors.forename: Daiki
authors.initials: D
authors.lastname: Kuzuhara
authors.forename: John
authors.initials: J
authors.lastname: Mack
authors.forename: Hiroko
authors.initials: H
authors.lastname: Yamada
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Okujima
authors.forename: Noboru
authors.initials: N
authors.lastname: Ono
authors.forename: Nagao
authors.initials: N
authors.lastname: Kobayashi