Structural and spectroscopic studies of self-assembling neptunium chloride complexes with pyridinium cations are part of a larger effort to study a series of related actinide compounds, which can expand crystallographic data and improve crystal engineering for uranium and transuranic complexes. The compounds described herein are synthesized utilizing supramolecular assembly of neptunium chloride anions, which form monomeric neptunium building units called tectons. These tectons are charge-balanced by halogenated pyridinium cations, giving rise to higher dimensionality overall structures through halogen-halogen and hydrogen bonding interactions. This synthesis method has previously been demonstrated to produce single crystals with uranium and plutonium tectons. The single crystal X-ray structures of these new complexes suggest that the complexes self-assemble based on halogen-halogen bonding between the halogen on the pyridinium ion and the chloride ions on the neptunium tecton and hydrogen bonding between the tecton chlorides and the proton associated with the nitrogen on the pyridinium. Attenuated total reflectance-infrared spectroscopy of the crystals was used to probe the vibrational information regarding these donor-acceptor interactions.<br/> <br/>PNNL-SA-113897

Supramolecular assembly, structure, and spectroscopic properties of Np complexes with pyridinium ions

251st National Meeting (2016)

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