Structural characterization of a new samarium-sodium heterometallic coordination polymer

Acta Crystallogr E Crystallogr Commun. 2024 Feb 6;80(Pt 3):267-270. doi: 10.1107/S2056989024001051. eCollection 2024 Mar 1.

Abstract

Lanthanide-containing materials are of inter-est in the field of crystal engin-eering because of their unique properties and distinct structure types. In this context, a new samarium-sodium heterometallic coordination polymer, poly[tetra-kis-(μ2-2-formyl-6-meth-oxy-phenolato)samarium(III)sodium(I)], {[SmNa(C8H7O3)4]·solvent}n (Sm-1), was synthesized and crystallized via slow evaporation from a mixture of ethanol and aceto-nitrile. The compound features alternating SmIII and NaI ions, which are linked by ortho-vanillin (o-vanillin) ligands to form a mono-periodic chain-like coordination polymer. The chains propagate along the [001] direction. Residual electron density of disordered solvent mol-ecules in the void space could not be reasonably modeled, thus the SQUEEZE function was applied. The structural, vibrational, and optical properties are reported.

Keywords: coordination polymer; crystal structure; lanthanide chemistry; o-vanillin; samarium.

Grants and funding

The primary funding mechanism for this study was the Laboratory Directed Research and Development program at Pacific Northwest National Laboratory, a multiprogram national laboratory operated by Battelle for the Department of Energy. AW and AA are grateful for support from the Linus Pauling Distinguished Postdoctoral Fellowship. RGS was supported by the US Department of Energy Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences and Biosciences, Heavy Element Chemistry program, FWP 73200. AMH was supported by the Department of Energy, National Nuclear Security Administration under award No. DE-NA0003763, the Arthur J. Schmitt Leadership Fellowship at the University of Notre Dame, and the postdoctoral program at Lawrence Livermore National Laboratory.