Single-Crystal-to-Single-Crystal Transition in an Enantiopure [7]Helquat Salt: The First Observation of a Reversible Phase Transition in a Helicene-Like Compound

Naba K. Nath, Lukáš Severa, Roman A. Kunetskiy, Ivana Císařová, Michal Fulem, Květoslav Růžička, Dušan Koval, Václav Kašička, Filip Teplý, Pance Naumov

Research output: Contribution to journalArticle

Abstract

Here it is reported that crystals of an enantiopure [7]helquat salt undergo reversible thermal solid-solid phase transition at 404K. Differential scanning calorimetry (DSC), capillary electrophoresis (CE), and X-ray diffraction analysis were used to unravel the mechanistic details of this process. The single-crystal-to-single-crystal course enabled direct monitoring of the structural changes by in situ variable-temperature X-ray diffraction, thus providing the first direct evidence of a solid phase transition in a helicene-like compound. Going through a phase: The first two examples of a phase transition in a helicene compound are reported. One of the phase transitions is mechanically robust and the crystal can withstand multiple thermal cycles without deterioration (see figure).

Original languageEnglish (US)
Pages (from-to)13508-13512
Number of pages5
JournalChemistry - A European Journal
Volume21
Issue number39
DOIs
StatePublished - Sep 1 2015

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Salts
Phase transitions
Single crystals
Capillary electrophoresis
Crystals
X ray diffraction analysis
Deterioration
Differential scanning calorimetry
X ray diffraction
Monitoring
Temperature
Hot Temperature

Keywords

  • chirality
  • helicene
  • phase transitions
  • polymorphism
  • X-ray diffraction

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Single-Crystal-to-Single-Crystal Transition in an Enantiopure [7]Helquat Salt : The First Observation of a Reversible Phase Transition in a Helicene-Like Compound. / Nath, Naba K.; Severa, Lukáš; Kunetskiy, Roman A.; Císařová, Ivana; Fulem, Michal; Růžička, Květoslav; Koval, Dušan; Kašička, Václav; Teplý, Filip; Naumov, Pance.

In: Chemistry - A European Journal, Vol. 21, No. 39, 01.09.2015, p. 13508-13512.

Research output: Contribution to journalArticle

Nath, Naba K. ; Severa, Lukáš ; Kunetskiy, Roman A. ; Císařová, Ivana ; Fulem, Michal ; Růžička, Květoslav ; Koval, Dušan ; Kašička, Václav ; Teplý, Filip ; Naumov, Pance. / Single-Crystal-to-Single-Crystal Transition in an Enantiopure [7]Helquat Salt : The First Observation of a Reversible Phase Transition in a Helicene-Like Compound. In: Chemistry - A European Journal. 2015 ; Vol. 21, No. 39. pp. 13508-13512.
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