Clusterization‐Triggered Emission

Tunable emission in the visible range from a single organic fluorophore through time-controlled morphological evolution

“…It was evident from the PXRD pattern that the crystallinity of PyS does not change during mechanical grinding, but the few peaks that disappeared in the ground form suggest that the molecular packing may be altered. [54][55][56] On fuming the green emissive ground form (PyS-G) with different solvents (methanol, n-hexane, dichloromethane, or ethyl acetate), the product does not revert to its original form (PyS-Y). When the ground form (PyS-G) was dissolved in dichloromethane and the solvent was slowly evaporated in a rotavapor, the original yellow PyS-Y form was recuperated (PXRD Fig.…”

Photocyclization reaction and related photodynamics in the photoproducts of a tetraphenylethylene derivative with bulky substituents: unexpected solvent viscosity effect

“…8–14 Many experimental and theorical studies have tried to understand the underlaying mechanisms of the AIE phenomenon with the aim to develop new AIE-luminogens (AIEgens) with improved properties. 9,11–13,15…”

“…[8][9][10][11][12][13][14] Many experimental and theorical studies have tried to understand the underlaying mechanisms of the AIE phenomenon with the aim to develop new AIEluminogens (AIEgens) with improved properties. 9,[11][12][13]15 Tetraphenylethylene (TPE) is the archetypal molecule with AIE properties. [16][17][18] Like other AIEgens, it displays a very weak emission in solutions, while its fluorescence is enhanced in aggregated or solid state where the internal motions are impeded.…”

Luminescent Behavior of Liquid–Crystalline Gold(I) Complexes Bearing a Carbazole Moiety: Effects of Substituent Bulkiness

“…This phenomenon, known as aggregation-caused quenching (ACQ), is common in organometallic molecules with π-electron systems and prevents their practical use. Owing to the essential contribution of molecular aggregation to luminescence properties, aggregated structures play an important role in luminescence behavior [5][6][7][8][9][10]. Liquid crystals (LCs) are a unique class of soft materials that flow like liquids and possess a long-range orientational order similar to that of crystals [7,[11][12][13][14].…”

“…Au(I) complexes show very interesting behavior because of their metallophilic d 10 -d 10 interactions. The emission observed in Au(I) complexes results from an interatomic Au-Au interaction; thus, Au(I) complexes exhibit the luminescence mainly from their aggregates and have been known as the AIE-active material.…”