Fluorescent Noncovalent Organic Framework for Supporting Gold Nanoparticles as Heterogeneous Catalyst with Merits of Easy Detection and Recycle

Abstract

A porous noncovalent organic framework with AIE effect is designed and synthesized as the support for gold nanoparticles (AuNPs). The framework is fabricated through the electrostatic complexation between carboxymethyl cellulose and tetraphenylethene‐containing ammonium surfactant, which can complex AuNPs via the noncovalent interactions to offer a heterogeneous catalyst. Compared to the covalent modification on cellulose, this noncovalent framework gains superiorities in the catalyst synthesis and the size control of AuNPs. The AIE property and water‐insolubility allow such heterogeneous catalysts to be easily detected, separated, and recycled, opening a new pathway for the reduction of nitrobenzene compounds and some dye compounds in aqueous conditions, which present the features of green chemistry. The use of cellulose for developing new heterogeneous metal catalysts, especially in a noncovalent way, would promote the value‐added utilization of cellulose. This work provides a design strategy for gaining heterogeneous metal catalysts by taking advantage of natural bioresources.

Construction of porphyrinic manganese-organic frameworks based on structural regulation for electrochemical determination of nitrobenzene in water and vegetable samples

“…Nitrobenzene (NB) and its compounds play crucial roles in the synthesis of dyes, pesticides, and explosives, moreover, they serve as solvents during petroleum refining processes ( Li et al, 2022 ). NB contamination in the environment is mainly from the discharge of industrial waste by chemical plants and dyestuff factories ( Wang et al, 2023 ). Due to its moderate water solubility and higher density relative to water, NB compounds tend to sink to the bottom of water and persist for a prolonged period, resulting in severe and persistent pollution of natural water resources ( Lu et al, 2023 ; Wang et al, 2024 ).…”

“…Various analytical methods including gas chromatography-mass spectrometry (GC-MS) ( Zhang et al, 2014 ), high performance liquid chromatography (HPLC) ( Wang and Chen, 2002 ), spectrophotometry ( Rafique et al, 2023 ; Rahman and Ahmad, 2024 ) and electrochemical techniques have been used for the detection of NB ( Koohfar et al, 2023 ; Wang et al, 2023 ; Papavasileiou et al, 2024 ). Among them, electrochemical techniques have received widespread attention due to their simple operation, high sensitivity, and low cost for detecting nitrobenzene.…”