New lanthanide hybrid as clustered infinite nanotunnel with 3D Ln-O-Ln framework and (3,4)-connected net

Inorg Chem. 2007 Feb 19;46(4):1171-6. doi: 10.1021/ic0615271.

Abstract

A series of new lanthanide hybrids [Ln3(mu-OH)4 (2,5-pydc)(2,5-Hpydc)3(H2O)4]n (Ln = Gd (1), Dy (2), Er (3), Eu (4), Sm (5), Yb (6), Y (7); 2,5-pydc=pyridine-2,5-dicarboxylate), as clustered lanthanide oxide ring tunnels with helical dodecahedral chains and fully 3D Ln-O-Ln connectivity, has been hydrothermally synthesized and characterized. The inorganic skeleton of the hybrid can be specified by the Schläfli symbol (6210)2 (64102) as a single 3D (3,4)-connected net. The luminescence properties have been studied, and the results showed that the Dy(III) (2) and Eu(III) (4) complexes exhibited sensitized luminescence in the visible region. Variable-temperature magnetic susceptibility measurements of 1-6 showed that the complexes 1-3 are nearly paramagnets, whereas the depopulation of the Stark levels in complexes 4-6 leads to a continuous decrease in mu(eff) when the sample is cooled from 300 to 2 K.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Lanthanoid Series Elements / chemical synthesis*
  • Lanthanum / chemistry*
  • Luminescence
  • Molecular Structure
  • Nanostructures / chemistry*
  • Organometallic Compounds / chemical synthesis*
  • Oxides / chemistry*
  • Photochemistry
  • Pyridines / chemistry
  • Spectrum Analysis
  • Temperature

Substances

  • Lanthanoid Series Elements
  • Organometallic Compounds
  • Oxides
  • Pyridines
  • 2,5-Pyridinedicarboxylic acid
  • lanthanum oxide
  • Lanthanum