Aromatic Thioethers as Novel Luminophores with Aggregation‐Induced Fluorescence and Phosphorescence

Abstract

Here we report on a novel system based on aromatic thioethers with unique luminescence properties. Fifteen different compounds were investigated in detail on their luminescence properties using UV/Vis absorption and steady-state and time-resolved luminescence spectroscopy. Excited state lifetimes as well as quantum yields were determined, and the toxicity towards HeLa cells was investigated. Besides X-ray analyses also quantum chemical calculations were performed to gain deeper insights in the unique behavior of this facile system. The studied compounds reveal remarkable fluorescence emission ranging from 437 to 588 nm as well as phosphorescence (up to 5 μs).

Phosphorescence Through Hindered Motion of Pure Organic Emitters

“…Recently Voskuhl and co‐workers discovered a novel class of small molecule emitters with aggregation‐induced phosphorescence properties . This system combines, in an elegant fashion, the facile synthesis (one‐step reaction) together with unique photophysical properties.…”

“…Recently Voskuhl and co-workersd iscovered an ovel class of small molecule emittersw ith aggregation-induced phosphorescence properties. [21] This system combines, in an elegant fashion,t he facile synthesis (one-step reaction) together with unique photophysical properties. To this end, aromatic tetrathioethers were synthesised with functional groups such as carboxylic acids or hydroxyl moieties (9-11)( Figure 5).…”

“…A) Compound (10)i nd ifferent DMF/water ratios under UV light (365 nm), B) Fluorescence spectraupon increasing water content, C) Emission wavelengthdependence on the water/DMF ratio (c = 100 mm). Adapted with permission from Ref [21]. Copyright 2017,Wiley-VCH.…”

Aggregation Induced Phosphorescence in the Main Group

“…[59] While most of these emitters displayed fluorescence, the authors found that two of the examples, 80 and 81 (Figure 15), displayed phosphorescence at 556 nm and 544 nm with lifetimes of 4.95 and 0.87 ms respectively. [59] While most of these emitters displayed fluorescence, the authors found that two of the examples, 80 and 81 (Figure 15), displayed phosphorescence at 556 nm and 544 nm with lifetimes of 4.95 and 0.87 ms respectively.…”

Aggregation‐Induced Emission of Multiphenyl‐Substituted 1,3‐Butadiene Derivatives: Synthesis, Properties and Application

“…[14][15][16][17] Luminogens with AIE features have been defined as AIEgens by Tang. [3] To date, AIEgensh ave been used in av ariety of fields such as organic light-emitting diodes, [18][19][20][21][22][23] chemosensors [24][25][26][27][28][29][30] and biosensors. [31][32][33][34][35][36] Experimental results and theoretical analysis have consistently revealed that the restriction of intramolecular motions (RIM), which includes the restriction of intramolecularr otations (RIR) and the restriction of intramolecular vibration (RIV), is attributable to the mechanism of the AIE effect.…”