Fluorescent chitosan hydrogel for highly and selectively sensing of p-nitrophenol and 2, 4, 6-trinitrophenol.
Fluorescent chitosan
Sensing mechanism
Trinitrophenol (TNP)
p-nitrophenol (4-NP)
Journal
Carbohydrate polymers
ISSN: 1879-1344
Titre abrégé: Carbohydr Polym
Pays: England
ID NLM: 8307156
Informations de publication
Date de publication:
01 Dec 2019
01 Dec 2019
Historique:
received:
13
07
2019
revised:
31
07
2019
accepted:
25
08
2019
entrez:
16
9
2019
pubmed:
16
9
2019
medline:
16
9
2019
Statut:
ppublish
Résumé
Nitroaromatic compounds, especially 2, 4, 6-trinitrophenol, have strong biological toxicity and explosive risks, so the detection of 2, 4, 6-trinitrophenol exhibit importantly practical and scientific significance. In this work, three fluorescence functionalized chitosan CNS 3, CNS 4 and CNS 5 were prepared using chitosan as matrix. When 2, 4, 6-trinitrophenol (TNP) and/or p-nitrophenol (4-NP) was present in spot, these fluorescent chitosan sensors produced notable fluorescence quenching. It renders the chitosan sensing ability to detect TNP and 4-NP selectively and sensitively. The sensing mechanism is investigated as well. When introduced electron-rich moieties to the fluorescent chitosan, the sensitive detecting ability could be obtained. Excellent recognition ability could reach as low as 0.28 μM. The fluorescence fictionalization cause slight influence to the gel performance of chitosan.
Identifiants
pubmed: 31521279
pii: S0144-8617(19)30920-8
doi: 10.1016/j.carbpol.2019.115253
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
115253Informations de copyright
Copyright © 2019 Elsevier Ltd. All rights reserved.