AIEE-active blue-emitting molecules derived from methoxyl-decorated triarylcyclopentadienes: Synthesis, crystal structures, photophysical and electroluminescence properties

Deciphering the Dynamics of Organic Nanoaggregates with AIEE Effect and Excited States: Lipophilic Benzothiadiazole Derivatives as Selective Cell Imaging Probes

“…The rotating units (Ph groups) of this structure are able to rotate in diluted solutions and, therefore, a nonemissive pathway is the preferential relaxation process. When the aggregation takes place, these molecular motions are blocked by intermolecular interactions and the emission from a radioactive pathway is favored, as confirmed for several small organic molecules and derivatives with the AIE effect. − After these findings, aggregation-induced emission enhancement (AIEE) luminophores were brought to a prominent position among small organic molecules. − The enhancement of light emissions upon aggregation may also afford bathochromic or hypsochromic shifts, thus allowing the color tuning for specific applications.…”

Recent Developments in AIEgens for Non‐doped and TADF OLEDs

“…As versatile organic molecules, cyclopentadiene derivatives (CPs) have also been widely used for the fabrication of blue‐ and multicolour‐OLEDs. Recently, Wang and co‐workers reported a systematic study on polyphenyl‐substituted CPs in order to understand the relationship between their molecular structures and optoelectronic properties. The use of bulky substituents attached to the CP backbone helped reducing the formation of coplanar structures and suppressing the intermolecular π–π interactions that promote ACQ, resulting in the improvement of the emission intensity and electroluminescence efficiency.…”

AIEE-active V-shaped fused-biscoumarins: synthesis, photophysical and electroluminescence properties

“…13–18 AIE and AIEE effects can be ascribed to the restricted intramolecular rotation (RIR) and highly twisted molecular conformations in the aggregation that inhibit strong intermolecular π–π stacking interactions, which are advantageous with respect to the highly efficient nondoped OLEDs. 19–23…”

“…[13][14][15][16][17][18] AIE and AIEE effects can be ascribed to the restricted intramolecular rotation (RIR) and highly twisted molecular conformations in the aggregation that inhibit strong intermolecular p-p stacking interactions, which are advantageous with respect to the highly efficient nondoped OLEDs. [19][20][21][22][23] Heterocycle-fused coumarin derivatives with the p-extended conjugation systems possess promising photophysical properties in comparison with the simple coumarin derivatives. [24][25][26][27][28][29][30] Among the heterocycle-fused coumarins, V-shaped fused-biscoumarins have attracted significant attention due to their distinguished properties, such as bathochromic-shift in the emission and excitation wavelengths, colorimetric properties, and larger Stokes shift, [31][32][33][34][35] and the photophysical properties and applications of V-shaped fused-biscoumarins are strongly dependent on the fused coumarin ring systems.…”