A new praseodymium-based coordination polymers with 1,10-phenantroline and glutarate ligands: Synthesis, crystal structure and luminescent properties

Roza Maouche (1) , Sabrina Belaid (1) , Belkacem Benmerad (1) , Sofiane Bouacida (2) , Carole Daiguebonne (3) , Yan Suffren (3) , Olivier Guillou (3)

1 UB - Université Abderrahmane Mira [Université de Béjaïa] = University Abderrahmane Mira [University of Béjaïa]
2 UMC - Université Frères Mentouri – Constantine 1 = Constantine 1 – Frères Mentouri University
3 ISCR - Institut des Sciences Chimiques de Rennes

A praseodymium-based coordination polymer with chemical formula [Pr(Hglu)(glu)phen·2H2O]∞ (phen = 1,10-phenanthroline, glu = glutarate) has been hydrothermally synthesized as single crystal, structurally characterized by X-ray diffraction, IR spectroscopy and ATG measurements. This compound crystallizes in the triclinic system, space group , with the following cell parameters: a = 9.8254(9) Å, b = 11.0617(9) Å, c = 12.8552(12) Å, α = 97.588(3)°, β = 108.427(3)°, γ = 112.643(3)°, V = 1170.87(19) Å3 and Z = 2. The praseodymium cation is nine-fold coordinated by one chelating phenanthroline ligand, two mono-protonated glutarate ligands, and three fully de-protonated glutarate ligands. The crystal structure is 1D and can be described on the basis of double molecular chains that bridge di-nuclear units. Inside a di-nuclear unit, Pr(III)-Pr(III) distance is 4.0475(3) Å. Room temperature solid-state emission spectrum has been recorded under 295 nm excitation wavelength. It shows the characteristic peaks of Pr3+ ion between 480 and 750 nm.

Mots clés: Praseodymium-based coordination polymer; Glutaric acid; Phenanthroline; Crystal structure; Luminescence

Domaines: Chimie inorganique

Roza Maouche, Sabrina Belaid, Belkacem Benmerad, Sofiane Bouacida, Carole Daiguebonne, et al.. A new praseodymium-based coordination polymers with 1,10-phenantroline and glutarate ligands: Synthesis, crystal structure and luminescent properties. Journal of Molecular Structure, 2021, 1225, pp.129164. ⟨10.1016/j.molstruc.2020.129164⟩. ⟨hal-02934610⟩