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. Author manuscript; available in PMC: 2013 Aug 13.
Published in final edited form as: J Phys Chem A. 2007 Oct 5;111(42):10849–10860. doi: 10.1021/jp073197r

Figure 2.

Figure 2

Resonance structures of merocyanine dyes. Depending on the relative electron donating and accepting strength of the “donor” (D) and “acceptor” (A) portions of the molecule, the dye can adopt different ground state structures, ranging from neutral through zwitterionic.