Role of entropic effects in controlling the polymorphism in formate ABX3 metal-organic frameworks

Gregor Kieslich, Shohei Kumagai, Keith T. Butler, Takuro Okamura, Christopher H. Hendon, Shijing Sun, Masahiro Yamashita, Aron Walsh, Anthony K. Cheetham

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)


Polymorphism in formate-based dense metal-organic frameworks with the general formula ABX3 is predicted by quantum chemical calculations and confirmed experimentally. In particular [NH3NH2]Zn(HCOO)3 crystallizes in two different polymorphs, a perovskite-like framework and a chiral structure with hexagonal channels. A detailed thermodynamic analysis reveals that both structures are very close in free energy and that entropy driven effects are responsible for stabilizing the channel structure.

Original languageEnglish
Pages (from-to)15538-15541
Number of pages4
JournalChemical Communications
Issue number85
Publication statusPublished - 2015

ASJC Scopus subject areas

  • Catalysis
  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry


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