Fabricating Soft Fluorescent Materials by a Supramolecular Method and a Cost-Effective Approach to Effectively Sense Amine Vapors during Fish Spoilage

Abstract

In this paper, we present a supramolecular method to fabricate soft fluorescent materials by simply grinding aggregation-induced emission (AIE) luminogens of TPA-Py with phenylboronic acid (PhBA), which proves the general research concept used to design fluorescent materials with tunable emission colors. The mechanistic study confirms that H-bonding plays a key role in gel formation and the smart responsive behavior to external stimuli (such as amine vapors and temperature changes). Thus, this result endows the fluorescent materials with the ability to detect amine vapors during fish spoilage. In addition, copolymerization and coprecipitation are consecutively performed to prepare highly cost-effective, conveniently storable, and safe to handle fluorescence spheres (named Fluo-Spheres), which can be employed as ultrasensors to monitor food safety in a noncontact mode.

Simple Way to Fabricate Emissive Boron-Containing Covalent Organic Frameworks

“…Taking COF-1&TPA-Py as a representative to illustrate the chemical structures and the diffraction peaks from different samples. First of all, in the case of COF-1&TPA-Py, the typical vibration bands from functional groups, such as CC and B–O, are represented at 1600 and 1305–1340 cm –1 , respectively, which provide a straightforward proof to confirm the adduct formation between COF-1 and TPA-Py (Figure a). , Meanwhile, solid-state 13 C cross-polarization magic-angle spinning (CP/MAS) NMR spectra were performed on TPA-Py and COF-1&TPA-Py, respectively (Figure c). In both samples, chemical shifts for the unsaturated carbons from phenyl rings were located in the range from 120 to 160 ppm.…”

Recent advances in aggregation-induced emission (AIE)-based chemosensors for the detection of organic small molecules

“…36a). 283 Using this approach, an AIE-active yellow-fluorescent supramolecular polymer complex ( C54b ) can be achieved from 4-pyridal TPA with phenylboronic acid-functionalized polyvinylpyrrolidone (PVP-BA), which was then used to fabricate fluorescent spheres via co-precipitation with sodium alginate for amine sensing (Fig. 36b and c).…”

Functional Polymeric Micromaterials Based on Aggregation‐Induced Emission Luminogens

“…Ma et al fabricated an AIE-active fluorescence spheres that can effectively sense amine vapors during fish spoilage. [28] As shown in Figure 1e, N-vinyl pyrrolidone (NVP) was used as a monomer to copolymerize with (4-vinylphenyl) boronic acid to synthesize a water-soluble polymer (PVP-BA). Then, an AIEgen composed of triphenylamine (TPA) and pyridine (Py) was incorporated into polymer chain via H-bonding interaction, producing yellow fluorescent powders (PVP-BA&Py).…”

“…In such a strategy, AIEgen‐bonded monomers are utilized to prepare microspheres by the aforementioned polymerization approaches. [ 27 ] Similarly, solvent evaporation, spray drying, and coacervation can be used for the preparation of polymer microspheres chemically linked with AIE molecules by using AIEgen‐bonded polymers as raw materials [ 28 ] (Scheme 2b).…”

“…Copyright 2020, Wiley-VCH. (e-g) Reproduced with permission [28]. Copyright 2021, American Chemical Society.…”