Reversible Mechanochromic Luminescence of [(C₆F₅Au)₂(μ-1,4-Diisocyanobenzene)]

Abstract

nescence changes from blue to yellow after grinding. Like other such compounds, its original lumi-nescent state is restored upon dissolution and recrystallization, and this process could be repeated for 20 cycles without any decrease in luminescence. Structural and spectroscopic studies indicate that the long-lived blue emission in the crystal is intramolecular in origin and phos-phorescent (a localized intraligand π-π* transition), whereas the yellow emission appears to arise from an amorphous phase characterized by aurophilic interactions: intermolecular interactions between gold atoms.-PDS

Structural characterization of dinuclear gold(I) diphosphine complexes with anion-triggered luminescence

“…and/or chemical (solvents, guests, anions, etc.) stimuli [14][15][16][17][18][19][20]. The solid-state luminescence, however, strongly depends on molecular structure and molecular packing modes modulated by the interplay of non-covalent interactions such as aurophilic, hydrogen bonding or π···π interactions that are sensitive to external stimuli [14].…”

Synthesis and Mechanofluorochromism of 4-[Bis(4-methylphenyl)amino]acetophenone

“…Among them, materials that exhibit reversible change in fluorescent color induced by mechanical stress such as grinding, namely "mechanofluorochromism", have recently been received attention. Several examples of both organometallic and pure organic materials have been reported to exhibit mechanofluorochromism [1][2][3][4][5][6][7][8][9][10][11][12][13] and these phenomena were generally believed to be due to change in intermolecular interactions caused by altering the molecular arrangements in the crystalline state by mechanical stress.…”

Vapour‐Induced Amorphous–Crystalline Transformation of a Luminescent Platinum(II)–Diimine Complex

“…[2] By taking advantage of the intermolecular metallophilic interaction mentioned in their report, much effort has been focused on developing new vapochromic materials that can be applied as chemical sensors. [3][4][5][6][7][8][9][10] One of the best-developed systems is a Pt II -diimine system. [2][3][4][5] The vapochromic behaviour in this series usually originates from the structural change induced by adsorption of vapour molecules.…”

“…[6,7] Some of the Au I complexes show not only vapochromism but also mechanochromism, which is the reversible colour change induced by the application of mechanical pressure. [7] Another approach is to incorporate well-established solvatochromic molecules into solid-state materials.…”