Crystal structures, thermal and luminescent properties of gadolinium(Iii) trans-1,4-cyclohexanedicarboxylate metal-organic frameworks

Pavel A. Demakov, Alena A. Vasileva, Vladimir A. Lazarenko, Alexey A. Ryadun, Vladimir P. Fedin

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

Аннотация

Four new gadolinium(III) metal-organic frameworks containing 2,2-bipyridyl (bpy) or 1,10-phenanthroline (phen) chelate ligands and trans-1,4-cyclohexanedicarboxylate (chdc2− ) were synthesized. Their crystal structures were determined by single-crystal X-ray diffraction analysis. All four coordination frameworks are based on the binuclear carboxylate building units. In the compounds [Gd2 (bpy)2 (chdc)3 ]·H2 O (1) and [Gd2 (phen)2 (chdc)3 ]·0.5DMF (2), the six-connected {Ln2 (L)2 (OOCR)6 } blocks form a 3D network with the primitive cubic (pcu) topology. In the compounds [Gd2 (NO3 )2 (phen)2 (chdc)2 ]·2DMF (3) and [Gd2 Cl2 (phen)2 (chdc)2 ]·0.3DMF·2.2dioxane (4), the four-connected {Ln2 (L)2 (X)2 OOCR)4 } units (where X = NO3 for 3 or Cl for 4) form a 2D square-grid (sql) network. The solid-state luminescent properties were investigated for the synthesized frameworks. Bpy-containing compound 1 shows no luminescence, possibly due to the paramagnetic quenching by Gd3+ cation. In contrast, the phenathroline-containing MOFs 2–4 possess yellow emission under visible excitation (λex = 460 nm) with the tuning of the characteristic wavelength by the coordination environment of the metal center.

Язык оригиналаанглийский
Номер статьи1375
ЖурналCrystals
Том11
Номер выпуска11
DOI
СостояниеОпубликовано - нояб. 2021

Предметные области OECD FOS+WOS

  • 1.04 ХИМИЧЕСКИЕ НАУКИ
  • 2.04 ХИМИЧЕСКИЕ ТЕХНОЛОГИИ

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