Amino group dependent sensing properties of metal-organic frameworks: selective turn-on fluorescence detection of lysine and arginine
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 2 was demonstrated to have capability for detection...
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Published in | RSC advances Vol. 1; no. 61; pp. 37449 - 37455 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
England
Royal Society of Chemistry
09.10.2020
The Royal Society of Chemistry |
Subjects | |
Online Access | Get full text |
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Summary: | 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
2
was demonstrated to have capability for detection of
l
-lysine (Lys) and
l
-arginine (Arg) selectively from common essential amino acids in aqueous media
via
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
1
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
2
. The difference of the sensing capacity and sensitivity between UiO-66 and UiO-66-NH
2
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.
The amino group of UiO-66-NH
2
was demonstrated to play an important role in selective fluorescence turn-on sensing of lysine and arginine. |
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Bibliography: | 10.1039/d0ra06879a Electronic supplementary information (ESI) available: PXRD, UV-Vis and additional emission spectra, comparison for lysine and arginine sensing. See DOI ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 2046-2069 2046-2069 |
DOI: | 10.1039/d0ra06879a |