A high temperature optic-electric duple switching organic ionic compound: 1,4,7-triazoniacyclononane tetrafluoroborate dichloride

Abstract

[9-tacn-3]³⁺[BF₄]⁻2[Cl]⁻ (9-tacn-3 = 1,4,7-triazoniacyclononane), 1, is a high temperature crystal-to-crystal phase transition organic ionic compound with optic-electric duple switchable properties, mainly driven by the order–disordered changes of the cations and anions. The abundant hydrogen bonds existing in compound 1 contribute to the packing and high stability of the structure.