Nanoscale crystallization and thermal behaviour of 1,2,4,5-tetrabromobenzene

Abdullah Khalil, Chunhua Tony Hu, Panče Naumov

Research output: Contribution to journalArticlepeer-review

Abstract

Nanocrystals of the thermosalient (TS) material 1,2,4,5-tetrabromobenzene (TBB) with diameters of 20, 100 and 200 nm were prepared by using nanoporous anodic aluminum oxide (AAO) templates. In contrast with bulk crystallization, which mainly affords single crystals of TBB in the stable phase β, two-dimensional X-ray microdiffraction revealed exclusive formation of polycrystalline TBB in the less stable phase γ inside the AAO nanopores. While bulk crystals of TBB undergo TS transition from phase β to γ at 41 °C and melt at 180 °C, the nanocrystals of phase γ TBB remain stable from cryogenic temperatures to nearly 80 °C and sublime at higher temperature. This study reveals fundamentally different crystallization and thermal behaviour of the TS materials at the nanoscale compared to the macroscale.

Original languageEnglish (US)
Pages (from-to)636-642
Number of pages7
JournalCrystEngComm
Volume20
Issue number5
DOIs
StatePublished - 2018

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Nanoscale crystallization and thermal behaviour of 1,2,4,5-tetrabromobenzene'. Together they form a unique fingerprint.

Cite this