Synthesis, crystal structure, and nonlinear optical behavior of beta-unsubstituted meso-meso E-vinylene-linked porphyrin dimers


Frampton M., Akdas H. , Cowley A., Rogers J., Slagle J., Fleitz P., ...More

ORGANIC LETTERS, vol.7, no.24, pp.5365-5368, 2005 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 7 Issue: 24
  • Publication Date: 2005
  • Doi Number: 10.1021/ol0520525
  • Title of Journal : ORGANIC LETTERS
  • Page Numbers: pp.5365-5368

Abstract

A vinylene-linked porphyrin dimer, with no substituents at the beta-positions, has been synthesized by Cul/CsF promoted Stille coupling. In the crystal structure of this dimer, the C2H2 bridge is twisted by 45 degrees relative to the plane of the porphyrins. The absorption, emission spectra, and electrochemistry reveal substantial porphyrin-porphyrin T-conjugation. The triplet excited-state absorption spectrum of this dimer makes it suitable for reverse saturable absorption at 710-900 nm.