Fluorescent Property of Chitosan Oligomer and Its Application as a Metal Ion Sensor

Lee, Hun Min; Kim, Min Hee; Yoon, Young Il; Park, Won Ho

doi:10.3390/md15040105

Cited by 41 publications

(30 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results are consistent with the relationship reported for solutions of CS polymer . Of note, CS oligomers express a decrease in fluorescence intensity when greater than 0.5% w/v solutions are used . Fluorescence emission spectra revealed a broad peak with maximum at 450 nm (Figure c).…”

supporting

confidence: 90%

Chitosan‐Based, Biocompatible, Solution Processable Films for In Vivo Localization of Neural Interface Devices

Rauhala

Domínguez

Spyropoulos

et al. 2019

Adv Materials Technologies

View full text Add to dashboard Cite

Chitosan (CS) is a biocompatible, inexpensive organic polymer that is increasingly used in neural tissue applications. However, its intrinsic fluorescence has not yet been leveraged to facilitate localization of neural interface devices, a key procedure to ensure accurate analysis of neurophysiological signals. A process is developed to enable control of mechanical and chemical properties of CS‐based composites, generating freestanding films that are stable in aqueous environments and exhibit concentration‐dependent fluorescence intensity. The shape and location of CS‐coated probes are reliably visualized in vitro and in vivo using fluorescence microscopy. Furthermore, CS neural probe marking is fully compatible with classical immunohistochemical and histological techniques, enabling localization of high spatiotemporal resolution surface electrocorticography arrays in adult rats and mouse pups. CS composites have the potential to simplify and streamline experimental procedures required to efficiently acquire, localize, and interpret neurophysiological data.

show abstract

supporting

confidence: 90%

Chitosan‐Based, Biocompatible, Solution Processable Films for In Vivo Localization of Neural Interface Devices

Rauhala

Domínguez

Spyropoulos

et al. 2019

Adv Materials Technologies

View full text Add to dashboard Cite

show abstract

“…Metal-ion sensing behavior of CS-Ac-An toward Cu(II) was studied using the fluorescence emission properties of the modified chitosan. While the adsorption spectra do not show any substantial change in the presence of Cu(II) species (Figure S6), the fluorescence emission of CS-Ac-An undergoes notable quenching [65][66][67][68][69]. Different excitation wavelengths were tested and showed a trend for the λ ex -dependent-λ em behavior.…”

Section: Fluorescence Studiesmentioning

confidence: 99%

Cu(II) Ion Adsorption by Aniline Grafted Chitosan and Its Responsive Fluorescence Properties

Vafakish¹,

Wilson²

2020

Molecules

View full text Add to dashboard Cite

The detection and removal of heavy metal species in aquatic environments is of continued interest to address ongoing efforts in water security. This study was focused on the preparation and characterization of aniline grafted chitosan (CS-Ac-An), and evaluation of its adsorption properties with Cu(II) under variable conditions. Materials characterization provides support for the grafting of aniline onto chitosan, where the kinetic and thermodynamic adsorption properties reveal a notably greater uptake (>20-fold) of Cu(II) relative to chitosan, where the adsorption capacity (Qm) of CS-Ac-An was 106.6 mg/g. Adsorbent regeneration was demonstrated over multiple adsorption-desorption cycles with good uptake efficiency. CS-Ac-An has a strong fluorescence emission that undergoes prominent quenching at part per billion levels in aqueous solution. The quenching process displays a linear response over variable Cu(II) concentration (0.05–5 mM) that affords reliable detection of low level Cu(II) levels by an in situ “turn-off” process. The tweezer-like chelation properties of CS-Ac-An with Cu(II) was characterized by complementary spectroscopic methods: IR, NMR, X-ray photoelectron (XPS), and scanning electron microscopy (SEM). The role of synergistic effects are inferred among two types of active adsorption sites: electron rich arene rings and amine groups of chitosan with Cu(II) species to afford a tweezer-like binding modality.

show abstract

“…The reaction was then carried out at various reaction temperatures (30, 40, 50, 60, and 70 °C) while stirring. CHI-FITC was used for the preparation of CHI-FITC/AgCl NPs in the previous study [ 19 ]. For the synthesis of CHI-FITC, an aqueous solution of CHI was added to an ethanol solution of FITC and the mixture was stirred at room temperature for 24 h in a dark room.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, in this study, AgCl NPs were prepared using CHI and CHI derivatives as eco-friendly stabilizers. The formation behavior of NPs was observed using the fluorescence properties of CHI and CHI derivatives reported in previous studies [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Formation of Silver Nanoparticles Using Fluorescence Properties of Chitosan Oligomers

2018

Self Cite

View full text Add to dashboard Cite

In this study, silver chloride nanoparticles (AgCl NPs) were prepared using chitosan oligomer (CHI) and chitosan oligomer derivatives (CHI-FITC). The CHI and CHI-FITC were used as markers to confirm the formation of AgCl NPs using their fluorescence properties as well as stabilizers. The fluorescence properties of CHI and CHI-FITC were monitored by a luminescence spectrophotometer, and the morphology of the AgCl NPs was further confirmed by transmission electron microscopy (TEM) and X-ray diffraction (XRD). The fluorescence of CHI and CHI-FITC was quenched by the formation of AgCl NPs, and the Stern–Volmer equation was used to compare the two types of stabilizer. The CHI and CHI-FITC stabilizer were linear and nonlinear, respectively, with respect to the Stern–Volmer equation, and considered to be usable as fluorescence indicators to confirm the formation behavior of AgCl NPs through fluorescence quenching.

show abstract

Fluorescent Property of Chitosan Oligomer and Its Application as a Metal Ion Sensor

Cited by 41 publications

References 23 publications

Chitosan‐Based, Biocompatible, Solution Processable Films for In Vivo Localization of Neural Interface Devices

Chitosan‐Based, Biocompatible, Solution Processable Films for In Vivo Localization of Neural Interface Devices

Cu(II) Ion Adsorption by Aniline Grafted Chitosan and Its Responsive Fluorescence Properties

Formation of Silver Nanoparticles Using Fluorescence Properties of Chitosan Oligomers

Contact Info

Product

Resources

About