Solvothermal synthesis, structural characterization and properties of two new layered lanthanide sulfates

Abstract

Two new layered lanthanide sulfates, [C₁₀H₁₀N₂][Pr₂(SO₄)₄(H₂O)₂](1) and [H₅O₂][Sm(SO₄)₂(H₂O)₃](2) were synthesized via solvothermal reaction and structurally characterized by single-crystal X-ray diffraction(XRD), infrared(IR) spectroscopy, thermal analysis, fluorescent spectra and inductively coupled plasma(ICP). Crystal data for compound 1, triclinic, P-1 space group, a=0.8052(4) nm, b=0.9438(4) nm, c=1.4990(7) nm, α=79.450(5)°, β=83.703(5)°, γ=74.048(5)°, V=1.0746(9) nm³, Z=2; for compound 2, monoclinic, P2(1)/c space group, a=0.6599(11) nm, b=1.8940(3) nm, c=0.8765(14) nm, β=96.596(2)°, V=1.0883(3) nm³, Z=4. Structure analysis indicates that both the compounds exhibit a 2D corrugated layer structure, with protonated 4,4′-bipyridine cations and water dimmers (H₅O₂)⁺ located between the inorganic layers of compounds 1 and 2, respectively. Luminescent properties of compounds 1 and 2 were further investigated.

Keywords

Solvothermal synthesis / Open-framework / Lanthanide sulfate / Layered structure / Luminescence

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