1075153-43-3Relevant academic research and scientific papers
Extending conjugation in porphyrin dimer carbocations
Thorley, Karl J.,Anderson, Harry L.
scheme or table, p. 3472 - 3479 (2010/08/22)
The addition of alkynyl porphyrins to carbonyl compounds was used to prepare a series of porphyrin dimer tertiary alcohols. Treatment of these alcohols with acid gave conjugated carbocations with three to nine carbon atoms bridging between the porphyrins. All these carbocations show strong absorption in the near-IR region between 1000-1800 nm. The absorption spectra exhibit a length-dependence similar to that of polymethine cyanines, with a bathochromic shift of approximately 200 nm (900 cm-1) per alkyne. The longest of these chromophores has an absorption maximum at 1623 nm (in CHCl3 with 2% trifluoroacetic acid). The symmetry of the π-system has a strong effect on the position, intensity and width of the absorption bands. The stability of the cations in solution decreases with increasing bridge length. The Royal Society of Chemistry 2010.
Porphyrin dimer carbocations with strong near infrared absorption and third-order optical nonlinearity
Thorley, Karl J.,Hales, Joel M.,Anderson, Harry L.,Perry, Joseph W.
, p. 7095 - 7098 (2009/04/07)
Colored carbocations beyond the visible! A porphyrin dimer carbocation is synthesized with effective delocalization over 18 conjugated bonds. Placing a carbocation at the center of a conjugated porphyrin dimer shifts its absorption into the infrared and results in strong ultrafast nonlinear optical behavior. (Graph Presented)
