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3D Ln-MOFs as multi-responsive luminescent probes for efficient sensing of Fe, CrO, and antibiotics in aqueous solution
Two families of lanthanide metal-organic frameworks (Ln-MOFs), namely {[Ln 2 L 2 (DMF) 4 ]· x DMF· y H 2 O} n (Ln = Ce( 1 ), Pr( 2 ), Sm( 3 ), Eu( 4 ), Gd( 5 ); x = 0, 1; y = 0, 1) and {[Ln 2 L 2 (H 2 O) 2.5 ]} n (Ln = Dy( 6 ), Ho( 7 )), have been solvothermally synthesized based on the semi-rigid t...
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| Published in: | CrystEngComm 2021-06, Vol.23 (21), p.3838-3848 |
|---|---|
| Main Authors: | , , , , , , |
| Format: | Article |
| Language: | |
| Online Access: | Get full text |
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| Summary: | Two families of lanthanide metal-organic frameworks (Ln-MOFs), namely {[Ln
2
L
2
(DMF)
4
]·
x
DMF·
y
H
2
O}
n
(Ln = Ce(
1
), Pr(
2
), Sm(
3
), Eu(
4
), Gd(
5
);
x
= 0, 1;
y
= 0, 1) and {[Ln
2
L
2
(H
2
O)
2.5
]}
n
(Ln = Dy(
6
), Ho(
7
)), have been solvothermally synthesized based on the semi-rigid tripodal ligand 5-(4-carboxybenzyloxy)isophthalic acid (H
3
L). Utilizing the excellent luminescence property and water stability, Eu(
4
) exhibited efficient luminescence responses toward Fe
3+
, Cr
2
O
7
2
−
, and NFT/NZF antibiotics in aqueous medium with high sensitivity and selectivity. The detection limits (LODs) are 3.69 μM for Fe
3+
ion, 4.01 μM for Cr
2
O
7
2
−
anion and 9.92 μM/11.4 μM for NFT/NZF antibiotics, suggesting that Eu(
4
) is a good and simple multifunctional luminescent sensor. Additionally, the Gd(
iii
) ions exhibit a weak antiferromagnetic interaction in the dinuclear SBUs of Gd(
5
), and Dy(
6
) shows slow magnetic relaxation behaviors under zero dc field.
Two families of Ln-based MOFs with 3D structures have been synthesized under solvothermal conditions. Eu-MOF (
4
) can act as a multi-responsive luminescent probe in water systems and Dy-MOF (
6
) shows slow magnetic relaxation behaviors. |
|---|---|
| ISSN: | 1466-8033 |
| DOI: | 10.1039/d1ce00399b |