Two 3D Isostructural Ln(III)-MOFs: Displaying the Slow Magnetic Relaxation and Luminescence Properties in Detection of Nitrobenzene and Cr₂O₇^2–

Abstract

Two new three-dimensional isostructural lanthanide metal-organic frameworks (Ln(III)-MOFs), [LnL(HO)]·3HO·0.75DMF (1-Ln; Ln = Dy(III) and Eu(III) ions, HL = biphenyl-3'-nitro-3,4',5-tricarboxylic acid, DMF = N,N'-dimethylformamide), were synthesized and characterized. The appearance of temperature-dependent out-of-phase (χ″) signal reveals that complex 1-Dy displays slow magnetic relaxation behavior with the energy barrier (ΔU) of 57 K and a pre-exponential factor (τ) of 3.89 × 10 s at 1200 Oe direct current field. The luminescence explorations demonstrated that 1-Eu exhibits high quenching efficiency and low detection limit for sensing nitrobenzene and CrO. Meanwhile, the fluorescence intensity of the quenched 1-Eu samples will be resumed after washing with DMF or water, indicating that 1-Eu may be used as a highly selective and recyclable luminescence sensing material for sensing nitrobenzene and CrO anion.

Retracted: Luminescent In(III)‐based coordination polymer for selectively sensing Cr2O72−, antibacterial and anti‐inflammatory effect on the infectious abortion

“…After calculation, the K SV slope is 6555070 M –1 , which is 565 times more than that of dimethyl sulfoxide/functional fluorescent aramid fiber (11600 M –1 ) utilized for Cr 2 O 7 2– sensing in water while 95 times more than that of fluorescent carbon dot (69000 M –1 ) utilized to identify Cr 2 O 7 2– in water. K SV is also better than a number of other benchmark sensors based on MOF and Eu 3+ @MIL‐124 (60340 M –1 ) utilized for sensing Cr 2 O 7 2– in the water . Compound 1 is highly sensitive along with selective for Cr 2 O 7 2– detection within the solution of water.…”

Synthesis, crystal structures and, magnetic and photoluminescence properties of lanthanide-based metal–organic frameworks constructed with 2,5-dihydroxybenzene-1,4-dicarboxylic acid

“…+ y, 1 2 À z) and O7/O8/O10/O11 sets of oxygen atoms. The dihedral angle between these is 3.89 (14) and the metal ion is displaced from them by À1.0574 (13) and 1.5255 (15)Å, respectively. The Dhbdc ligands display two kinds of coordination modes; the C7/O1/O2 and C8/O3/O4 carboxylate groups are bis(monodentate) bridging (m 2 -h 1 ,h 1 ), whereas C12/O7/O8 is h 2 (O,O 0 ) chelating.…”

“…The lanthanide-based metal-organic frameworks (MOFs) have drawn special consideration owing to their fascinating structures [1][2][3][4][5][6][7][8][9][10] resulting from the exible coordination environment of lanthanide(III) ions 1,5,11 and due to their distinct magnetic and optical properties arising from the 4f electrons of lanthanides. [4][5][6][11][12][13][14][15][16] These properties led to their prospective applications in catalysis, 10,17,18 gas absorption, 6,18,19 optoelectronic devices, 12,13,[20][21][22][23][24][25] sensors, 7,[26][27][28] contrast agents 29 and molecular magnetism. 5,15,16,[30][31][32] Several factors are important for the rational design of MOFs, such as the shape and binding mode of the...…”

The properties of MOF-Zn2(EBNB)2(BPY)2·2H2O and its basic study of loading Methadone

“…[15] , and successfully realized the eld crossing. As a new type of nano porous material, comparing with activated carbon and zeolite, MOFs have been widely used in the elds of gas capture, storage and separation [16] ; drug release [17] ; optical, magnetic, electrical science [18] ; catalytic science [19] ; chiral resolution [20] and so on. Zn 2 (EBNB) 2 (BPY) 2 •2H 2 O is a new type of 3D porous MOFs material [21] .…”