A novel samarium complex with interesting photoluminescence and semiconductive properties

Abstract

[Sm(H₂O)₄(NO₃)₃](4,4'-Hbipy)₂(NO₃)₂ (1) (bipy = bipyridine) has been synthesized via hydrothermal reaction and characterized by X-ray diffraction. The title complex features an isolated structure, based on discrete 4,4'-Hbipy moieties, isolated nitrates and [Sm(H₂O)₄(NO₃)₃] species. The samarium ion is in a distorted bicapped square antiprism environment, coordinated by three bidentate nitrates and four coordination water molecules. The 4,4'-Hbipy moieties, isolated nitrates and [Sm(H₂O)₄(NO₃)₃] species are held together via hydrogen bonds and p…p interactions to form a 3-D supramolecular framework. Luminescent investigation reveals a strong emission in blue region. Optical absorption spectrum of 1 reveals the presence of an optical gap of 3.60 eV.

KEY WORDS: Bipyridine, Crystal structure, Fluorescence, Hydrothermal reaction, Samarium

Bull. Chem. Soc. Ethiop. 2017, 31(3), 435-444. 

DOI: http://dx.doi.org/10.4314/bcse.v31i3.7