The near-infrared region (NIR, 700�1000 nm) is relatively unexplored in photochemical studies yet roughly half of the usable photons from the sun reside in this spectral window.  Nature employs bacteriochlorophylls in photosynthetic bacteria to capture NIR photons, yet synthetic analogues of bacteriochlorophylls (i.e., bacteriochlorins) have only recently become available.  We have employed a rational synthetic strategy to prepare a suite of synthetic bacteriochlorins, each of which contains one bioconjugatable group (maleimide, carboxy, formyl, iodoacetamide), and together which cover a portion of the NIR (713�820 nm). The bacteriochlorins are well suited for use in diverse studies in artificial photosynthesis  .

Palette of bioconjugatable bacteriochlorins with near-infrared absorption

244th National Meeting (2012)

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