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In-Core N4-Coordination of Palladium(II) in Dinaphthoporphycene: Synthesis, Structure, and Photophysical Studies

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journal contribution
posted on 02.02.2022, 17:11 authored by Sameeta Sahoo, Pradeepta K. Panda
Dinaphthoporphycene (DNP) has emerged as a versatile ligand undergoing large out-of-plane distortion to form a cis-bimetallic complex with Pd­(II) using Pd­(OAc)2 and out-of-plane monometallic complexes with Pd­(acac)2 and PtCl2(PhCN)2. Herein, we are finally able to synthesize the in-core complex with Pd­(II) using PdCl2(PhCN)2 or PdCl2. The crystal structure shows the palladium ion resides slightly above the N4-core, with the Pd­(II) dimensionally dissenting with the typical square planarity displayed by the reported in-core DNP complexes with Ni­(II) and Cu­(II) ions. The deformed complex displays a blue shift in the absorption spectra compared to DNP and its metallo-derivatives. PdDNP exhibits a moderate singlet oxygen generation ability (18%).