Progress in 9,10-distyrylanthracene derivatives with aggregation-induced emission

Abstract

Molecular crystals based on 9,10-distyrylanthracene derivatives with high solid state fluorescence efficiency and uniaxial orientation induced by supramolecular interactions

Molecular Design, Circularly Polarized Luminescence, and Helical Self‐Assembly of Chiral Aggregation‐Induced Emission Molecules

“…In recent years, TPEh as becomeastar AIEgen owing to its facile synthesis, easy functionalization, high luminescence efficiency, and good photo-andc hemical stability. [10][11][12][13][14] Its derivativesa re thus alternative AIEgens to be used for fabricating luminescent micro/nanostructures.…”

“…Interestingly,t he molecule 9 could form lefthandedh elical nanofibers in DCE/hexane mixtures (1:9, v/v; Figure 21 d), showing as olvent-controlled helical self-assembly behavior.T hrough XRD analysisa nd computational simulation, as ynergistic effect from the multiple intermolecular hydrogenbondinginteractions, p-p interactions, and the steric effect between the attached groups is proposed to serve as the driving force for the assemblingp rocess. To explore the influence of d-a nd l-amino acid-containing attachments on the self-assembly properties of the PIM-based AIEgens, we investigated the assembly behavioro fP IM-d-Ala (13)a nd PIM-l-Ala (14). Interestingly,t hey both formed lefthandedh elical fibers upon the evaporation of their THF solution (Figure 22 a, c), althought hey showedm irror-image CD and CPL spectra.C ompared with the uniform fibers formed by 13,t he fibers generated by 14 rotate more tightly,w hich are at multiple association levels.T he helical pitches of the fibers vary in aw ide range from several tens of nanometers to several hundredso fn anometers.…”

“…In 2001, Tang and co‐workers reported an abnormal photophysical phenomenon of aggregation‐induced emission (AIE), which is exactly opposite to the ACQ effect . AIE luminogens (AIEgens) such as silole, tetraphenylethene (TPE), and their derivatives, are non‐emissive in solution but become highly emissive when aggregated or in the solid state (Figure b) . The restriction of intramolecular motions (RIM), including rotation and vibration, was proposed as the main cause for the AIE effect based on experiments and theoretical analysis .…”

“…[9] AIE luminogens (AIEgens) such as silole, tetraphenylethene (TPE), and their derivatives, are non-emissive in solution but become highly emissive when aggregated or in the solid state ( Figure 1b). [10][11][12][13][14][15] The restriction of intramolecular motions (RIM), including rotation and vibration, was proposeda st he main cause for the AIE effect based on experiments and theoretical analysis. [16] In dilute solution, the molecular rotors of AIEgens can rotate and vibrate freely,p roviding an energy relaxation channel for the excited state to decay non-radiatively,t hus make the molecules non-emissive.…”

Highly-ordered assembled organic fluorescent materials for high-resolution bio-sensing: a review

“…13 Beyond diagnostic benefits, continuous tracking of these bio-signals facilitates more convenient and precise treatment of chronic diseases. 14,15 Longterm monitoring provides a valuable tool for enhancing the management of chronic conditions, contributing to improved healthcare outcomes.…”