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Lanthanide-based metal-organic framework materials as bifunctional fluorescence sensors toward acetylacetone and aspartic acid
Ist Teil von
CrystEngComm, 2022-03, Vol.24 (13), p.2464-2471
Ort / Verlag
Cambridge: Royal Society of Chemistry
Erscheinungsjahr
2022
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
A family of novel lanthanide-based metal-organic frameworks (Ln-MOFs) with bifunctional fluorescence sensing properties, namely, {[(CH
3
)
2
NH
2
]
5
[Ln
5
(TBAPy)
5
]·solvent}
n
(Ln = Gd (
1
), Tb (
2
), and Dy (
3
); H
4
TBAPy = 1,3,5,7-tetra(4-carboxybenzene)pyrene), was synthesized and structurally characterized. Structural analysis reveals that
Ln-MOFs
1-3
are isomorphic, and
Gd-MOF
1
has a three-dimensional structure with a porosity of 20.40%. Due to the existence of the pyrene ring featuring a conjugated system,
Ln-MOFs
1-3
exhibit strong fluorescence emission. Interestingly,
Ln-MOFs
1-3
could be considered as good bifunctional fluorescence sensors toward acetylacetone and aspartic acid
via
a turn-on effect. The detection limits of
Tb-MOF
2
toward acetylacetone and aspartic acid are 0.129 and 0.025 ppm, respectively. Furthermore, the probable sensing mechanisms for target analytes were also discussed in detail.
Three lanthanide-based MOFs with a pyrene-based carboxylate ligand were solvothermally synthesized, which could be considered as fluorescence sensors toward acetylacetone and aspartic acid
via
a turn-on effect.