Synthesis and Crystal Structure of a Cumulenic Quinoidal Porphyrin Dimer with Strong Electronic Absorption in the Infrared We thank the Engineering and Physical Sciences Research Council (UK) and the Defence Evaluation and Research Agency (DERA, UK) for support and the EPSRC Mass Spectrometry Service in Swansea for FAB mass spectra.
University of Oxford Department of Chemistry, Dyson Perrins Laboratory South Parks Road, Oxford OX1 3QY (UK).
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