Push-pull type of diphenoquinoid chromophores as novel near-infrared dyes

Abstract

Novel push-pull diphenoquinoid chromophores, in which one of the terminal positions carries a strong donor group, benzo-1,3-dithiol-2-ylidene, and the other a strong acceptor group, dicyanomethylene, are synthesized and show a strong absorption in the near-infrared region.

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