Journal
INORGANIC CHEMISTRY
Volume 59, Issue 14, Pages 9560-9568Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.0c00439
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Funding
- United States Department of Energy - Basic Energy Sciences through the Chemical Sciences, Geosciences, and Biosciences (CSGB) subdivision for Heavy Elements Chemistry [DE-SC0019177]
- U.S. Department of Energy (DOE) [DE-SC0019177] Funding Source: U.S. Department of Energy (DOE)
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Derivatives of a novel pyrrole-containing Schiff base ligand system (called pyrrophen) are presented which feature substituted phenylene linkers (R-1 = R-2 = H (H2L1); R-1 = R-2 = CH3 (H2L2)) and a binding pocket modeled after macrocyclic species. These ligands bind neutral CH3OH in the solid state through pyrrolic hydrogen-bonding. The interaction of the uranyl cation (UO22+) and H2L1-2 yields planar hexagonal bipyramdial uranyl complexes, while the Cu2+ and Zn2+ complexes were found to self-assemble as dinuclear helicate complexes (M2L2) with H2L1 under identical conditions. The favorable binding of UO22+ over Znprovides insight into the molecular recognition of uranyl over other metal species. Structural features of these complexes are examined with special attention to features of the UO22+ coordination environment which distinguish them from other related salophen and porphyrinoid complexes.
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