Self-Assembled Conjugated Polymer/Chitosan-<i>graft</i>-Oleic Acid Micelles for Fast Visible Detection of Aliphatic Biogenic Amines by “Turn-On” FRET

Zhong, Haoquan; Liu, Chunchen; Ge, Wenjiao; Sun, Run‐Cang; Huang, Fei; Wang, Xiaohui

doi:10.1021/acsami.7b06168

Cited by 66 publications

(39 citation statements)

References 57 publications

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“…The value of chromatism (Δ E * ab ) was quantified to represent the visual performance of probes. As shown in Figure 2d and Figure S13, Supporting Information, the Δ E * ab was much higher than those of many top‐performing ratiometric probes, such as MR@EuMOF, [ 16a ] CDs/CdTe QDs, [ 27 ] PFTBTCOOH/CS‐graft‐OA, [ 28 ] Bp(Im) 2 MA, [ 29 ] PAHO S , [ 30 ] and comparable with that of CA‐PpIX/CA‐FITC. [ 31 ] Additionally, unlike other ratiometric probes (green area: visualization methods), the linear range of our probe is highly overlapped with the BA index range (≈5–50 mg L −1 , the concentration range between fresh and spoiled food), implying its potential for visual monitoring of effective BAs concentration for the degree of food spoilage.…”

Section: Resultsmentioning

confidence: 99%

A Fluorescent Metal–Organic Framework for Food Real‐Time Visual Monitoring

Wang

et al. 2021

Advanced Materials

177

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Due to increasing food‐safety issues, exploiting efficient approaches for food quality assessment and instrumentation has attracted concerns worldwide. Herein, a smart evaluation system based on a fluorescent metal–organic framework (MOF) is developed for real‐time visual monitoring of food freshness. Via post‐synthetic modification, a ratiometric fluorescent MOF probe is constructed by covalently coupling fluorescein 5‐isothiocyanate (5‐FITC) with NH2‐rich lanthanide MOF. The probes exhibit a dual‐emissive‐responsive to biogenic amine, resulting in an increase in FITC emission along with a decrease in Eu3+ emission accompanied by a clear distinguishable color transition from orange red to green. After doping the probes on a flexible substrate, the obtained MOF composite film can be integrated with a smartphone‐based portable platform easily. It is proved that this smart evaluation system can be used for on‐site inspection of the freshness of raw fish samples. This work develops a fluorescent MOF‐based smart evaluation system as a novel platform for application in food monitoring, which not only has enormous economic value but also holds great public health significance.

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Section: Resultsmentioning

confidence: 99%

A Fluorescent Metal–Organic Framework for Food Real‐Time Visual Monitoring

Wang

et al. 2021

Advanced Materials

177

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“… 28 Self-assembly conjugated polymers encapsulated in chitosan- graft -oleic acid with visually noticeable fluorescence response from blue to red have been reported as an alternative method for the detection of aliphatic biogenic amines. 29 A Diels–Alder cycloaddition and thiol-Michael “click” reaction has been developed to graft a fluorescein derivative and coumarin onto cellulose nanofibrils (CNF), yielding multicolor CNF. 30 …”

Section: Introductionmentioning

confidence: 99%

Fluorescence control of chitin and chitosan fabricatedviasurface functionalization using direct oxidative polymerization

Hai

Sugimoto

2018

RSC Adv.

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The copolymer of 3-hexylthiophene (3HT) and fluorene (F) was directly grafted onto chitin and chitosan using FeCl 3 as an oxidant. The properties of the grafted chitin/chitosan were characterized by Fourier transform infrared (FT-IR) spectroscopy, UV-Vis spectroscopy, fluorescence spectroscopy, X-ray diffraction analysis, thermogravimetric analysis (TGA), transmission electron microscopy-energy dispersive X-ray spectroscopy, and quantum yield measurements. The UV-Vis absorption peaks of the chitin/chitosan grafted with 3-hexylthiophene and fluorene copolymer were increasingly blue-shifted upon increasing the fluorene content and the red-shifted emission of the grafted chitin/chitosan were controlled by varying the monomers feed of the 3HT/F units. The hypsochromic and bathochromic shifts of chitin/chitosan were ascribed to the (3HT/F) moieties grafted to their surface. The quantum yield of grafted chitin/chitosan increased upon increasing the fluorene content. The TGA and XRD analysis revealed that the thermal stability and crystallinity of chitin/chitosan decreased upon grafting the copolymer of fluorene and 3-hexylthiophene. This article represents a simple route towards the surface modification of chitin and chitosan using conducting copolymers, providing multicolor chitin and chitosan via a one-step reaction.

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“…The 2,4-D loaded CMCS-DEACMS-2 micelles were prepared according to the literature [ 22 , 46 ]. CMCS-DEACMS (10.0 mg) was dissolved in buffer solution (pH 7.4) to obtain a concentration of 1 mg/mL.…”

Section: Methodsmentioning

confidence: 99%

Coumarin-Containing Light-Responsive Carboxymethyl Chitosan Micelles as Nanocarriers for Controlled Release of Pesticide

et al. 2020

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Currently, controlled release formulations (CRFs) of pesticides in response to biotic and/or abiotic stimuli have shown great potential for providing “on-demand” smart release of loaded active ingredients. In this study, amphiphilic biopolymers were prepared by introducing hydrophobic (7-diethylaminocoumarin-4-yl)methyl succinate (DEACMS) onto the main chain of hydrophilic carboxymethylchitosan (CMCS) via the formation of amide bonds which were able to self-assemble into spherical micelles in aqueous media and were utilized as light-responsive nanocarriers for the controlled release of pesticides. FTIR and NMR characterizations confirmed the successful synthesis of the CMCS-DEACMS conjugate. The critical micelle concentration (CMC) decreased with the increase in the substitution of DEACMS on CMCS, which ranged from 0.013 to 0.042 mg/mL. Upon irradiation under simulated sunlight, the hydrodynamic diameter, morphology, photophysical properties and photolysis were researched by means of dynamic light scattering (DLS), transmission electron microscopy (TEM), UV-vis absorption spectroscopy and fluorescence spectroscopy. Moreover, 2,4-dichlorophenoxyacetic acid (2,4-D) was used as a model pesticide and encapsulated into the CMCS-DEACMS micelles. In these micelle formulations, the release of 2,4-D was promoted upon simulated sunlight irradiation, during which the coumarin moieties were cleaved from the CMCS backbone, resulting in a shift of the hydrophilic–hydrophobic balance and destabilization of the micelles. Additionally, bioassay studies suggested that this 2,4-D contained which micelles showed good bioactivity on the target plant without harming the nontarget plant. Thereby, the light-responsive CMCS-DEACMS micelles bearing photocleavable coumarin moieties provide a smart delivery platform for agrochemicals.

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Self-Assembled Conjugated Polymer/Chitosan-graft-Oleic Acid Micelles for Fast Visible Detection of Aliphatic Biogenic Amines by “Turn-On” FRET

Cited by 66 publications

References 57 publications

A Fluorescent Metal–Organic Framework for Food Real‐Time Visual Monitoring

A Fluorescent Metal–Organic Framework for Food Real‐Time Visual Monitoring

Fluorescence control of chitin and chitosan fabricatedviasurface functionalization using direct oxidative polymerization

Coumarin-Containing Light-Responsive Carboxymethyl Chitosan Micelles as Nanocarriers for Controlled Release of Pesticide

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