Pyrene-Based Nonwoven Fabric with Tunable Fluorescence Properties by Employing the Aggregation-Caused Quenching Effect

Abstract

Conventional aromatic compounds tend to exhibit the formation of sandwich-shaped excimers and exciplexes between their excited and ground states at high concentrations or in their aggregated states, causing their fluorescence to weaken or disappear due to the aggregation-caused quenching (ACQ) effect. This limits their applications in concentrated solutions or solid materials. Herein, for the first time, ACQ-based pyrene (Py) units are covalently connected to the surface of polyethylene/polypropylene nonwoven fabric (PE/PP NWF) via electron beam preradiation-induced graft polymerization followed by chemical modification. The matrix can be considered a solid solvent and Py units as a solid solute, such that the amount of Py units can be controlled by varying the reaction time. The obtained fluorescent fabric not only exhibits remarkable fluorescence properties with high fluorescence intensity, high quantum yield (>90%), and excellent fluorescence stability after laundering or in harsh chemical environments, but the fluorescence color and intensity, quantum yield, and lifetime can also be regulated by employing the ACQ effect. Additionally, the as-prepared fluorescent fabric can effectively distinguish common monocyclic aromatic hydrocarbons via a simple fluorescence response test.

High-Quality Conjugated Polymers Achieving Ultra-Trace Detection of Cr2O72− in Agricultural Products

“…From Figure 3, we can see that only Cr2O7 2− could quench the fluorescence of monomers Fmoc-Ala-OH and Fmoc-Thr-OH, which indicated that they have high selectivity to Cr2O7 2− . We speculate that the N and O atoms may interact with Cr2O7 2− [32], which caused the aggregate of fluorene and resulted in fluorescence quenching [33]. Then, we studied the selectivity of their corresponding polymers.…”

“…2− [32], which caused the aggregate of fluorene and resulted in fluorescence quenching [33]. Then, we studied the selectivity of their corresponding polymers.…”

Amplified Spontaneous Emission Threshold Dependence on Determination Method in Dye-Doped Polymer and Lead Halide Perovskite Waveguides

“…Significant advancements toward the realization of tunable solid-state dye lasers have been made thanks to the incorporation of small molecules in polymeric waveguides. In this regard, in order to improve the operational stability of devices and reduce the thermal and chemical photodegradation of dyes, numerous studies have carried out focusing both on the choice of the active organic dye and the embedding polymeric structure [8][9][10][11][12][13].…”

Aggregation-Induced Emission Effect within Peroxyoxalate-Loaded Mesoporous Silica Nanoparticles for Efficient Harvest of Chemiluminescence Energy in Aqueous Solutions

“…31−37 However, the concentration of such fluorescent dyes is limited due to the aggregation-caused quenching (ACQ) effect at high concentrations. 38 To break the concentration limit, aggregation-induced emission (AIE) molecules 39−41 were chosen as a substitute for ACQ dyes during fluorescence sensing. In contrast to ACQ dyes, AIE molecules/nanoparticles are nonemissive in diluted solutions but are induced to emit intensely when they aggregate in concentrated solutions through the restriction of intramolecular rotation.…”

“…In the CPPO-H 2 O 2 CL systems, organic fluorescent dyes (such as rhodamine, coumarin, fluorescein, etc.) are usually employed as the activators, leading to chemiexcitation. − However, the concentration of such fluorescent dyes is limited due to the aggregation-caused quenching (ACQ) effect at high concentrations . To break the concentration limit, aggregation-induced emission (AIE) molecules − were chosen as a substitute for ACQ dyes during fluorescence sensing.…”