As analogues of porphyrinoids and dipyrromethene families of dye, aza-dipyrromethene (ADPM) derivatives exhibit exciting photophysical properties. Their high absorbance (e up to 100 000 M-1cm-1) and strong near-IR (NIR) luminescence are especially interesting in the context of designing new light-harvesting materials. In the present study, we introduce the first examples of ADPM cyclometallation on neutral ruthenium complexes bearing either bpy 1 or terpy 2 and demonstrate the latter support further chemical modifications toward the achievement of new photosensitizers 3 for dye-sensitized solar cells (DSSC). Photophysical characterization and modelization studies will be presented to assess the origin of the bathochromic shift in the NIR region observed in the absorption spectra. Electrochemistry of the complexes will also be discussed in the perspective of optimization toward the specific energetic levels required for photovoltaic applications such as DSSC and OPV. Figure 1. <img src='https://acs-archive-assets2.s3.amazonaws.com/240nm/uploads/39565_acs-toc.jpg' alt='' />

Cyclometallation of aza-dipyrromethene on neutral RuII complexes: Toward new chromophores with extended NIR absorption properties for light-harvesting applications

247th National Meeting (2014)

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