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Poly(diketopyrrolopyrrole-terthiophene) for ambipolar logic and photovoltaics

Johan C Bijleveld1, Arjan P Zoombelt, Simon G J Mathijssen

  • 1Molecular Materials and Nanosystems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.

Journal of the American Chemical Society
|November 6, 2009
PubMed

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The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
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