title: Mechanistic Investigation of Inducing Triboluminescence in Lanthanide(III) β-Diketonate Complexes.
abstract: In this work, we synthesized a series of lanthanide(III) β-diketonate complexes to investigate the induction of triboluminescence. Triboluminescence (TL) spectra, solid-state emission spectra, and luminescence lifetimes of the complexes were obtained to prove consistent emitting species for steady-state and triboluminescence measurements. Detailed analyses of the crystal lattice packing were conducted in an attempt to correlate crystal symmetry, gas discharge, and structural arrangements with "triboexcitation", and it is found that either noncentrosymmetric or centrosymmetic compounds can be TL-active. Furthermore, an intensely TL compound, Eu(dbm)4TMP, was achieved, and its light emission can be seen under daylight upon mechanical stress.
authors.affiliation: Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University , Hung Hom, Hong Kong.
authors.forename: Ho-Yin
authors.initials: HY
authors.lastname: Wong
authors.affiliation: Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University , Hung Hom, Hong Kong.
authors.forename: Wai-Sum
authors.initials: WS
authors.lastname: Lo
authors.affiliation: Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University , Hung Hom, Hong Kong.
authors.forename: Wesley Ting Kwok
authors.initials: WTK
authors.lastname: Chan
authors.affiliation: Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University , Hung Hom, Hong Kong.
authors.forename: Ga-Lai
authors.identifier: http://orcid.org/0000-0002-2192-6887
authors.initials: GL
authors.lastname: Law