Circularly Polarized Luminescence of Aggregation‐induced Emission Materials

“…[1] To obtain high Φ F in solid or aggregates state, luminogens with aggregation-induced emission (AIE) characteristics have been proven to be promising candidates for the emissive moiety in CPL materials. [13][14][15] Via introducing chiral substituents onto AIEgens skeleton or co-assembling the achiral AIEgens with chiral components, a large library of AIE-active CPL materials have been successfully fabricated. [16][17][18] In these chiral AIE-active systems, the achiral AIEgen would adapt a preferential helical assembly in the assemblies or solid state (such as the gel [19][20] and liquid crystal [21][22] ) under the impacts of chiral substituents or chiral co-assembling moieties.…”

Section: Introductionmentioning

confidence: 99%

Full-color-tunable Chiral Aggregation-induced Emission Fluorophores with Tailored Propeller Chirality and their Circularly Polarized Luminescence

Li,

Liang,

et al. 2024

Preprint

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The regulation of emission color, emission efficiency and asymmetry factor is of great significance for the real applications of circularly polarized luminescent (CPL) materials. Herein, we develop a modular synthetic strategy toward full-color-tunable CPL materials based on chiral macrocyclic aggregation-induced emission (AIE) luminogens via delicate molecular engineering. Modular synthesis of chiral AIEgens with different acceptor moieties has afforded series of bright solid emitters with tunable emission colors. These chiral cyclic AIEgens have retained high solid state emission quantum yield and displayed CPL emission from blue to red as nano-aggregates, in liquid crystal matrix and polymer film. The strong acceptor units in the red-emitting chiral AIEgens RBTPE-2CN and SBTPE-2CN have rendered them twisted intramolecular charge transfer property and solvatochromic luminescence. And polymer matrix with different polarity further facilitates the tuning of CPL emission color from green to red emission. These results have paved a reliable approach toward constructing full-spectra solid-state CPL material.

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Sub‐Nanoconfined Aggregation‐Induced Emission Molecules via Stacked Layers of Microtubular Covalent Organic Frameworks for Enhanced Fluorescence

Wang,

Han,

Zhang

et al. 2023

Advanced Optical Materials

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Functionalizing aggregation‐induced emission molecules (AIEs) by confining them in porous materials is attracted extensive attention. Here stacked layers of hollow microtubular covalent organic frameworks (HT‐COFs) are introduced as sub‐nanoconfined sites (0.37 nm) to confine AIEs. The spacious hollow channels allow unimpeded entry for AIEs, while the interlayers perpendicular to the channels partially incarcerate the AIEs within the COFs layers. This effectively restricts the intramolecular rotation of AIEs and facilitates its radiative processes. Through exchanging of various AIEs, the versatility of the COFs interlayer as a restriction site is demonstrated. Furthermore, the sub‐nanoconfined fluorescence in AIEs@HT‐COFs displays reversible temperature dependence. Based on this, a temperature‐tunable fluorescent Micro‐QR code device is fabricated, wherein the encoded information disappears at a high‐temperature and reemerges at a low‐temperature. This work offers novel insights into confined fluorescence within functional materials and the fabrication of AIEs‐COF multiplex frameworks.

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Circularly Polarized Luminescence of Aggregation‐induced Emission Materials

Cited by 6 publications

References 69 publications

Stereomutation and chiroptical bias in the kinetically controlled supramolecular polymerization of cyano-luminogens

Stereomutation and chiroptical bias in the kinetically controlled supramolecular polymerization of cyano-luminogens

Full-color-tunable Chiral Aggregation-induced Emission Fluorophores with Tailored Propeller Chirality and their Circularly Polarized Luminescence

Sub‐Nanoconfined Aggregation‐Induced Emission Molecules via Stacked Layers of Microtubular Covalent Organic Frameworks for Enhanced Fluorescence

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