Ionic Clathrate Hydrates of Tetra-n-Butylammonium Nitrate (TBANO3) and Mixed TBA(NO3,OH): Novel Superstructures of Tetragonal Structure I

T. V. Rodionova, D. S. Odintsov, A. Yu Manakov, V. Yu Komarov

Research output: Contribution to journalArticlepeer-review

Abstract

The structures of an ionic clathrate hydrate of tetra-n-butylammonium nitrate TBANO3·26.7H2O and mixed TBA(NO3)1 −x(OH)x·(31.5 − x)H2O hydrate obtained from a mixture of tetra-n-butylammonium nitrate and tetra-n-butylammonium hydroxide are determined by single crystal X-ray diffraction. These structures are new types of superstructures based on classical tetragonal structure I with four- and twofold unit cells volumes for TBANO3·26.7H2O and TBA(NO3)1−x(OH)x·(31.5 − x)H2O respectively. The superstructures form as a result of ordering in the arrangement of multicompartment cavities of the water-anionic framework. A TBA cation is displaced from the center of combined cavities due to the anisotropic environment of the anions, which leads to an additional symmetry reduction. The modes of the nitrate anion incorporation into the water framework of ionic clathrate hydrates are determined for the first time.

Original languageEnglish
Pages (from-to)1660-1669
Number of pages10
JournalJournal of Structural Chemistry
Volume60
Issue number10
DOIs
Publication statusPublished - 1 Oct 2019

Keywords

  • disordered structures
  • ionic clathrate hydrates
  • local ordering
  • structures
  • tetra-n-butylammonium hydroxide
  • tetra-n-butylammonium nitrate
  • X-ray crystallographic analysis
  • MIXTURE
  • TBAB
  • COLD-STORAGE MATERIAL
  • HYDROGEN STORAGE
  • CO2 CAPTURE
  • BROMIDE
  • FLUE-GAS
  • SEPARATION
  • BUTYL
  • AMMONIUM-CHLORIDE

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