AI Article Synopsis
- Metal-organic frameworks (MOFs), like UiO-66-NH, are being explored for their potential as fluorescence chemsensors thanks to their customizable structures and light-emitting properties.
- The UiO-66-NH MOF can selectively detect l-lysine and l-arginine among other amino acids in water, exhibiting a strong fluorescence turn-on mechanism, high sensitivity, and good resistance to interference.
- The study indicates that the fluorescence enhancement occurs due to the adsorption of l-lysine and l-arginine and hydrogen bonding with the amino groups in UiO-66-NH, highlighting the importance of functional groups in the sensing capabilities of MOFs.
Article Abstract
Recently, metal-organic frameworks (MOFs) have been extensively investigated as fluorescence chemsensors due to their tunable porosity, framework structure and photoluminescence properties. In this paper, a well-known Zr(iv)-based MOF, UiO-66-NH was demonstrated to have capability for detection of l-lysine (Lys) and l-arginine (Arg) selectively from common essential amino acids in aqueous media a fluorescence turn-on mechanism. Further investigation reveals its high sensitivity and strong anti-interference properties. Moreover, the possible mechanism for sensing Lys and Arg was explored by FT-IR and H-NMR, and the results indicate that the enhancement of the fluorescence could be ascribed to the adsorption of Lys/Arg and the hydrogen bonding interactions between Lys/Arg and the amino group of UiO-66-NH. The difference of the sensing capacity and sensitivity between UiO-66 and UiO-66-NH revealed that the amino group plays an essential role in the sensing performance. This work presents a unique example of the functional group dependent sensing properties of MOFs.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9057127 | PMC |
| http://dx.doi.org/10.1039/d0ra06879a | DOI Listing |
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