Synthesis, crystal structure, optical and thermal properties of lanthanide hydrogen-polyphosphates Ln[H(PO3)4] (Ln = Tb, Dy, Ho). Issue 44 (20th October 2015)

• Record Type: Journal Article
• Authors: Förg, Katharina; Höppe, Henning A.
• Is Part Of: Dalton transactions. Volume 44:Issue 44(2015)
• Page Start: 19163
• Page End: 19174
• Publication Date: 2015-10-20
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c5dt02648b
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Lanthanide hydrogen-polyphosphates Ln[H(PO3 )4 ] (Ln = Tb, Dy, Ho) as well as Dy[H(PO3 )4 ]:M (M = Ce, Eu) were synthesised as colourless (Ln = Tb, Dy) and light pink (Ln = Ho) crystalline powders by reaction of Tb4 O7 /Dy2 O3 /Ho2 O3 with H3 PO3 at 380 °C. Abstract : Lanthanide hydrogen-polyphosphates Ln[H(PO3 )4 ] (Ln = Tb, Dy, Ho) were synthesised as colourless (Ln = Tb, Dy) and light pink (Ln = Ho) crystalline powders by reaction of Tb4 O7 /Dy2 O3 /Ho2 O3 with H3 PO3 at 380 °C. All compounds crystallise isotypically ( P 21 / c (no. 14), Z = 4, a Tb = 1368.24(4) pm, b Tb = 710.42(2) pm, c Tb = 965.79(3) pm, β Tb = 101.200(1)°, 3112 data, 160 parameters, w R 2 = 0.062, a Ho = 1363.34(5) pm, b Ho = 709.24(3) pm, c Ho = 959.07(4) pm, β Ho = 101.055(1)°, 1607 data, 158 parameters, w R 2 = 0.058). The crystal structure comprises two different infinite helical chains of corner-sharing phosphate tetrahedra. In-between these chains the lanthanide ions are located, coordinated by seven oxygen atoms belonging to four different polyphosphate chains. Vibrational, UV/Vis and fluorescence spectra of Ln[H(PO3 )4 ] (Ln = Tb, Dy, Ho) as well as Dy[H(PO3 )4 ]:Ln (Ln = Ce, Eu) and the magnetic and thermal behaviour of Tb[H(PO3 )4 ] are reported.