Synthesis, Crystal Structure, and Nonlinear Optical Behavior of β-Unsubstituted meso−meso E-Vinylene-Linked Porphyrin Dimers
datasetposted on 24.11.2005 by Michael J. Frampton, Huriye Akdas, Andrew R. Cowley, Joy E. Rogers, Jonathan E. Slagle, Paul A. Fleitz, Mikhail Drobizhev, Aleksander Rebane, Harry L. Anderson
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A vinylene-linked porphyrin dimer, with no substituents at the β-positions, has been synthesized by CuI/CsF promoted Stille coupling. In the crystal structure of this dimer, the C2H2 bridge is twisted by 45° relative to the plane of the porphyrins. The absorption, emission spectra, and electrochemistry reveal substantial porphyrin−porphyrin π-conjugation. The triplet excited-state absorption spectrum of this dimer makes it suitable for reverse saturable absorption at 710−900 nm.