Crystal Structure and Triboluminescence of Europium(Iii) Tetrakis-thenoyl Trifluoroacetonate With Outer-sphere Organic Cation

Abstract

A novel complex of Eu(III) tetrakis-thenoyltrifluoroacetonate with the outer-sphere cation 2-(E)-1-(2-thenoyl)ethylidene)-1-hydrazine carboxyimidoamide (Q) of the composition Q[Eu(ТТА)4]·H2O (TTA – thenoyltrifluoroacetonate-ion, Q – outer-sphere cation) characterized with intense luminescence and triboluminescence has been synthesized. The structure of the centrosymmetric crystal is composed of complex anions of the composition [Eu(TTA)4]¯, which are stacked in layers parallel to the plane (100), whereas interlayers of organic cations are located between the layers. A structural model for the formation of triboluminescent properties has been suggested.