Synthesis, crystal structure and calcination of three novel complexes based on 2-aminopyridine and polyoxometalates

Yun Gong, Changwen Hu*, Hui Li, Wang Tang, Kunlin Huang, Wenbin Hou

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

Three novel complexes based on 2-aminopyridine and polyoxometalates (POMs) formulated as (C5N2H7)5H[P 2Mo5O23], 1, (C5N2H 7)6(H2O)2[V10O 28], 2, (C5N2H7)12(H 2O)2(CH3OH)[PMo12O 40]4, 3, were hydrothermally synthesized and structurally characterized by elemental analysis, IR, UV, TG and single crystal X-ray diffraction. Compounds 1, 2 and 3 consist of 2-aminopyridine cations together with different POMs, [P2Mo5O23]6-, [V10O28]6- and [PMo12O 40]3-, respectively. 2-Aminopyridine cations in 1 orderly link [P2Mo5O23]6- like ribbons via alternating N-H⋯O and C-H⋯O hydrogen bonding interactions and compound 1 exhibits one dimensional empty channel. It is resulted from that the weak interactions between [P2Mo5O23] 6- leave equal sized cavities in which 2-aminopyridine just fits. Whereas the varying distances between POMs in compounds 2 and 3 caused by their different interactions between POMs lead to the disorder of 2-aminopyridine. Heating compounds 1 and 3 at 600°C in air for 2 h yielded nanometer or micrometer-scale MoO3. Their different morphologies result from the different POMs and molecular arrays in their precursors.

Original languageEnglish
Pages (from-to)228-238
Number of pages11
JournalJournal of Molecular Structure
Volume784
Issue number1-3
DOIs
Publication statusPublished - 20 Feb 2006

Keywords

  • Crystal structure
  • H-bond
  • Molecular array
  • Nanometer
  • Polyoxometalates
  • Synthesis

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