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• W3204676127 endingPage "122623" @default.
• W3204676127 startingPage "122623" @default.
• W3204676127 abstract "The analysis of breath VOC biomarkers is an efficient method for the early diagnosis of lung cancer. In this work, the zirconium UiO-66 was post-synthetically modified by using methylamine (MA), ethylenediamine (ED) and N,N′ -dimethylethylenediamine (MMEN), respectively. The modified UiO-66 materials were thoroughly characterized, including PXRD, FTIR, TGA, physical adsorption at 77 ​K by nitrogen and photoluminescence analysis. The sensing properties of the modified UiO-66 materials toward the selected five potential breath VOC biomarkers were investigated. Results showed that after modification, the BET surface area and total pore volume all decreased, and followed the order: UiO-66 ​> ​UiO-66-MA ​> ​UiO-66-MMEN ​> ​UiO-66-ED. Furthermore, the N–H group was successfully grafted into the modified UiO-66 samples. In comparison with UiO-66, the fluorescence intensities of UiO-66-MA, UiO-66-ED and UiO-66-MMEN toward hexanal, styrene and isoprene all obviously increased, while the fluorescence intensities of the modified UiO-66 materials toward 1-propanol and ethylbenzene all decreased a lot, accompanied by the frequency shift. In addition, the LOD of hexanal on UiO-66-MA was calculated to be as low as 12 ​ppm, which was obviously lower than that of UiO-66 (31 ​ppm). The fluorescence quenching of hexanal was mainly due to the FRET mechanism. The results of this study would provide information for the development of early breath diagnosis of lung cancer. • The UiO-66 was postsynthetically modified by introducing N–H groups. • The modified UiO-66 presented turn-off effects toward hexanal. • The LOD of hexanal on UiO-66-MA was estimated to be as low as 12 ​ppm. • The modified UiO-66 exhibited good anti-interferent ability and recyclability. • The fluorescence quenching of hexanal was mainly due to the FRET mechanism." @default.
• W3204676127 created "2021-10-11" @default.
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• W3204676127 date "2022-01-01" @default.
• W3204676127 modified "2023-10-01" @default.
• W3204676127 title "Amine-functionalized UiO-66 as a fluorescent sensor for highly selective detecting volatile organic compound biomarker of lung cancer" @default.
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• W3204676127 doi "https://doi.org/10.1016/j.jssc.2021.122623" @default.
• W3204676127 hasPublicationYear "2022" @default.
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