New hybrid diphosphates Ln2(NH2(CH2) 2NH2)(HP2O7)2·4 H2O (Ln=Eu, Tb, Er): Synthesis, single crystal and powder X-ray crystal structure

Francesco Capitelli, Brahim El Bali, Rachid Essehli, Mohammed Lachkar, Iván Da Silva

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12 Citations (Scopus)

Abstract

Crystals of lanthanide ethylenediamine diphosphates Ln2(NH 2(CH2)2NH2)(HP2O 7)2·4 H2O (Ln = Eu (1), Tb (2), Er (2)) have been synthesized and investigated by single crystal X-ray diffractometry (Eu and Tb phases) and by powder X-ray diffractometry (Er phase). The three structures resulted to be isostructural within triclinic space group P1, with unit cell parameters of a = 6.5050(6) Å; b = 6.9990(2) Å; c = 9.8450(9) Å; α = 81.548(5)°; β = 80.631(19)°; γ = 88.369(9)°; V = 437.44(6) Å3 (1), a = 6.4360(7) Å; b = 6.9480(12) Å; c = 9.816(4) Å; α = 81.987(19)°; β = 80.595(16)°; γ = 88.591(13)°; V = 428.82(19) Å3 (2), a = 6.39658(2) Å; b = 6.86682(2) Å; c = 9.78849(3) Å; α = 81.6811(4)°; β = 80.2304(3)°; γ = 88.3812(3)°; V = 419.255(3) Å3 (3). The three-dimensional network is built up by the repetition of ab-parallel layers of LnO8 polyhedra corner-sharing with (HP2O7) groups; ethylenediamine molecules lie between such layers, acting both as receptors and donors in strong hydrogen bonds which assure the stabilizing of the entire framework.

Original languageEnglish
Pages (from-to)788-794
Number of pages7
JournalZeitschrift fur Kristallographie
Volume221
Issue number12
DOIs
Publication statusPublished - 2006
Externally publishedYes

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Keywords

  • Diphosphate
  • Ethylenediamine
  • Hydrogen bond
  • Lanthanide
  • Powder diffraction structure analysis
  • Single crystal structure analysis
  • X-ray diffraction

ASJC Scopus subject areas

  • Condensed Matter Physics

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