A stimuli-responsive double-stranded digold(i) helicate

Crystalline-Amorphous-Crystalline Transformation in a Highly Brilliant Luminescent System with Trigonal-Planar Gold(I) Centers

“…Chromic luminescent compounds whose emission energies and intensities change in response to external stimuli have received increasing attention because of their potential applications as chemical/biological probes and organic light-emitting diodes 1 2 3 . These compounds often involve Au I ions as a metal component 4 5 6 7 8 9 , in which their photo-luminescence is highly sensitive to the change in intramolecular and intermolecular Au···Au aurophilic interactions 10 11 . Thus far, organic vapors 4 , solvents 5 , counter anions 6 , metal ions 7 , temperature 8 , and mechanical force 9 have been used as triggers to change the emission colors and intensities of gold(I) compounds.…”

“…These compounds often involve Au I ions as a metal component 4 5 6 7 8 9 , in which their photo-luminescence is highly sensitive to the change in intramolecular and intermolecular Au···Au aurophilic interactions 10 11 . Thus far, organic vapors 4 , solvents 5 , counter anions 6 , metal ions 7 , temperature 8 , and mechanical force 9 have been used as triggers to change the emission colors and intensities of gold(I) compounds. Generally, each Au I center of these compounds has a two-coordinated linear geometry 12 13 .…”

Stimuli‐Responsive Dynamic Gold Complexes

“…Interestingly, in addition to these blue‐ and red‐emitting forms of 20 , bluish‐green and yellow luminescent forms were obtained by slight modification of the crystallization conditions. Nevertheless, the redshifted emission of the amorphous 20 obtained by mechanical grinding appears to arise from the emergence of new π ··· π interactions and a higher degree of π ··· π conjugation between the [Au 2 (diphos) 2 ] 2+ cores 35c…”

Observation of crystallisation dynamics by crystal-structure-sensitive room-temperature phosphorescence from Au(I) complexes

“…Some Au(I) complexes exhibit AIE activity owing to an intermolecular interaction known as the aurophilic interaction 25,26 , in which a non-covalent Au-Au bond is formed between molecules. Because of this interaction, the luminescence of Au(I) complexes can be increased by aggregation in condensed phases [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46] . We hypothesised that the introduction of multiple aurophilic interactions could further enhance the AIE activity of Au complexes [36][37][38][39][40][41][42][43][44][45][46] and enable us to visualise a crystallisation process clearly.…”