Mixed-Linkage Donor-Acceptor Covalent Organic Framework as a Turn-On Fluorescent Sensor for Aliphatic Amines.
Jie-Yu YueZi-Xian PanLi-Ping SongWen-Jiang YuHong ZhengJian-Cheng WangPeng YangBo TangPublished in: Analytical chemistry (2023)
Amine determination is crucial to our daily life, including the prevention of pollution, the treatment of certain disorders, and the evaluation of food quality. Herein, a mixed-linkage donor-acceptor covalent organic framework (named DSE-COF) was first constructed by the polymerization between 2,4-dihydroxybenzene-1,3,5-tricarbaldehyde (DTA) and 4,4'-(benzo[ c ][1,2,5]selenadiazole-4,7-diyl)dianiline (SEZ). DSE-COF displayed superior turn-on fluorescent responses to primary, secondary, and tertiary aliphatic amines, such as cadaverine, isopropylamine, sec -butylamine, cyclohexylamine, hexamethylenediamine, di- n -butylamine, and triethylamine in absolute acetonitrile than other organic species. Further experiments and theoretical calculations demonstrated that the combination of intramolecular charge transfer (ICT) and photoinduced electron transfer (PET) effects between the DSE-COF and aliphatic amines resulted in enhanced fluorescence. Credibly, DSE-COF can quantitatively detect cadaverine content in actual pork samples with satisfactory results. In addition, DSE-COF-based test papers could rapidly monitor cadaverine from real pork samples, manifesting the potential application of COFs in food quality inspection.
Keyphrases
- electron transfer
- living cells
- energy transfer
- human health
- quantum dots
- fluorescent probe
- sensitive detection
- water soluble
- risk assessment
- genome wide
- single molecule
- heavy metals
- quality improvement
- computed tomography
- hiv testing
- escherichia coli
- density functional theory
- molecular dynamics
- combination therapy
- solar cells
- gene expression
- label free
- pet ct
- hiv infected
- mass spectrometry
- air pollution
- climate change
- health risk assessment
- antiretroviral therapy