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An Expanded Porphycene with High NIR Absorptivity That Stabilizes Two Different Kinds of Metal Complexes
Gonzalo Anguera1, Won-Young Cha2, Matthew D Moore1
1Department of Chemistry, The University of Texas at Austin, 105 East 24th Street, Stop A5300, Austin, TX, 78712-1224, USA.
Abstract:
A new expanded porphycene with 26 π-electrons has been prepared by the McMurry coupling of 1,4-bis(3,4-diethyl-2-pyrryl)benzene dialdehyde. Expansion of the porphycene framework provides a ligand capable of stabilizing a bis(rhodium) and a monoruthenium complex. These new porphycene derivatives absorb strongly in the NIR spectral region, with appreciable absorptivity up to 1300 nm. On the basis of their ground- and excited-state spectroscopic features and structural parameters, both the free-base system and the bis(rhodium) complex are considered to be Hückel-type aromatic systems. This conclusion is supported by DFT calculations.
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