A new europium metal–organic framework with both high proton conductivity and highly sensitive detection of ascorbic acid

Yuan, Yue-Ying; Yang, Shuqing; Zhang, Chen-Xi; Wang, Qing‐Lun

doi:10.1039/c8ce01506f

Cited by 35 publications

(13 citation statements)

References 70 publications

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“…Ln-MOFs materials have outstanding luminescence characteristics; that is, they have the advantages of large Stokes shift, high quantum yield and luminescence intensity, narrow emission spectrum range, flexible coordination mode, and long luminescence life. MOFs fluorescent probes are commonly used as sensors [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. Hna et al [26] synthesised Ce-MOF to detect Fe 3+ , and Gai et al [27] synthesised dual-sensor Eu-MOF to detect Fe 3+ and Cr 2 O 7 2− .…”

Section: Introductionmentioning

confidence: 99%

Preparation of Eu0.075Tb0.925-Metal Organic Framework as a Fluorescent Probe and Application in the Detection of Fe3+ and Cr2O72−

Yin

Chu

Qin

et al. 2021

Sensors

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Luminescent Ln-MOFs (Eu0.075Tb0.925-MOF) were successfully synthesised through the solvothermal reaction of Tb(NO3)3·6H2O, Eu(NO3)3·6H2O, and the ligand pyromellitic acid. The product was characterised by X-ray diffraction (XRD), TG analysis, EM, X-ray photoelectron spectroscopy (XPS), and luminescence properties, and results show that the synthesised material Eu0.075Tb0.925-MOF has a selective ratio-based fluorescence response to Fe3+ or Cr2O72−. On the basis of the internal filtering effect, the fluorescence detection experiment shows that as the concentration of Fe3+ or Cr2O72− increases, the intensity of the characteristic emission peak at 544 nm of Tb3+ decreases, and the intensity of the characteristic emission peak at 653 nm of Eu3+ increases in Eu0.075Tb0.925-MOF. The fluorescence intensity ratio (I653/I544) has a good linear relationship with the target concentration. The detection linear range for Fe3+ or Cr2O72− is 10–100 μM/L, and the detection limits are 2.71 × 10−7 and 8.72 × 10−7 M, respectively. Compared with the sensor material with a single fluorescence emission, the synthesised material has a higher anti-interference ability. The synthesised Eu0.075Tb0.925-MOF can be used as a highly selective and recyclable sensing material for Fe3+ or Cr2O72−. This material should be an excellent candidate for multifunctional sensors.

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Section: Introductionmentioning

confidence: 99%

Preparation of Eu0.075Tb0.925-Metal Organic Framework as a Fluorescent Probe and Application in the Detection of Fe3+ and Cr2O72−

Yin

Chu

Qin

et al. 2021

Sensors

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“…As listed in Table , the best σ of 1 (5.09 × 10 –3 S · cm –1 at 98% RH and 100 °C) is comparable to those of several conductive lanthanide crystalline materials, such as Tb(III)-MOF (2.57 × 10 –2 S · cm –1 at 98% RH and 60 °C), H[(N(Me) 4 ) 2 ][Gd 3 (NIPA) 6 ]}·3H 2 O (7.2 × 10 –2 S · cm –1 , 75 °C and 98% RH), and {[Er 4 (OH) 4 (DSO) 2 (H 2 O) 8 ]·4.6H 2 O·1.4CH 3 CN} n (6.59 × 10 –3 S · cm –1 , 80 °C and 95% RH), and higher than those of other reported lanthanide crystalline materials. ,− For 1 , the optimized conductivity value of 5.09 × 10 –3 S·cm –1 (at 98% RH and 100 °C) ranks second among the previous Er-CPs under similar conditions, − whereas for 2 , the optimized σ of 3.09 × 10 –3 S · cm –1 (at 98% RH and 100 °C) is the highest among the reported values for Yb-CPs …”

Section: Results and Discussionmentioning

confidence: 56%

High Proton Conduction in Two Highly Water-Stable Lanthanide Coordination Polymers from a Triazole Multicarboxylate Ligand

Niu

et al. 2021

Inorg. Chem.

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Two lanthanide coordination polymers (CPs) {[Er(Hmtbd)(H2mtbd)(H2O)3]·2H2O} n (1) and [Yb(Hmtbd)(H2mtbd)(H2O)3] n (2) carrying an N-heterocyclic carboxylate ligand 5-(3-methylformate-1H-1,2,4-triazole-1-methyl)benzen-1,3-dicarboxylate (H3mtbd) were prepared under solvothermal conditions. The single-crystal X-ray diffraction data demonstrate that 1 and 2 are isostructural and display 1D chain structure. Alternating current (AC) impedance measurements illustrate that the highest proton conductivities of 1 and 2 can attain 5.09 × 10–3 and 3.09 × 10–3 S·cm–1 at 100 °C and 98% relative humidity (RH), respectively. The value of 1 exceeds those of most reported lanthanide-based crystalline materials and ranks second among the described Er-CPs under similar conditions, whereas the value for 2 is the highest proton conductivity among the previous Yb-CPs. Coupled with the structural analyses of the two CPs and H2O vapor adsorption, the calculated E a values help to deduce their proton conductive mechanisms. Notably, the N-heterocyclic units (triazole), carboxyl, and hydrogen-bonding network all play key roles in the proton-transfer process. The prominent proton conductive abilities of both CPs show great promise as efficient proton conductors.

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“…} n ], a fluorescent threedimensional (3D) supra-network MOFs, displays high sensitivity for sensing AA with a "turn-off " luminescent quenching response. 24 ZJU-137 MOF as a turn-off switch fluorescent sensor for the detection of AA has been presented by Qian's group. 25 Remarkably, these reported MOFsimplicated chemosensors can only detect AA with high sensitivity, selectivity, and low detection limit based on turnoff luminescent quenching effect.…”

Section: ■ Introductionmentioning

confidence: 96%

“…Currently, considerable effort has been made to design and synthesize MOFs-implicated chemosensors to detect AA. For example, [{(H 3 O)[Eu(SBDB)(H 2 O) 2 ]} n ], a fluorescent three-dimensional (3D) supra-network MOFs, displays high sensitivity for sensing AA with a “turn-off ” luminescent quenching response . ZJU-137 MOF as a turn-off switch fluorescent sensor for the detection of AA has been presented by Qian’s group .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of a Luminescence-Silent System Based on a Post-Synthetic Modification Cd-MOFs: A Highly Selective and Sensitive Turn-on Luminescent Probe for Ascorbic Acid Detection

Xiao

Liu

et al. 2019

Inorg. Chem.

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A unique three-dimensional luminescent metal–organic framework (Cd-MOFs), [Cd(tpbpc)2]·2H2O·DMF (Htpbpc = 4′-[4,2′;6′,4″]-terpyridin-4′-yl-biphenyl-4-carboxylic acid; DMF = dimethylformamide), was synthesized and structurally characterized; it exhibits excellent luminescent property and structural stability in aqueous solutions. Interestingly, an unparalleled luminescence-silent system CrO4 2–@Cd-MOFs was successfully fabricated by postsynthetic modification of metal–organic frameworks. This luminescence-silent system represents a highly selective and sensitive turn-on luminescent responding to ascorbic acid. First, this advanced fluorescent sensor displays excellent performance for CrO4 2– ions with a quenching of fluorescence intensity originating from fluorescence resonance energy transfer (FRET) mechanism. What’s more, the fluorescent intensity of CrO4 2–@Cd-MOFs system can be recovered (turn-on) for sensing ascorbic acid because of the elimination of FRET process. Such a novel fabrication strategy should offer the guidance to develop various MOFs-implicated luminescence-silent systems as “turn-on” sensors for detection of specific chemicals.

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A new europium metal–organic framework with both high proton conductivity and highly sensitive detection of ascorbic acid

Abstract: The highest proton conductivity of the new Eu-MOF reaches up to 1.0 × 10−4 S cm−1. Furthermore, it is an excellent luminescence-based sensor for detection of ascorbic acid (AA) in aqueous solutions.

Cited by 35 publications

References 70 publications

Preparation of Eu0.075Tb0.925-Metal Organic Framework as a Fluorescent Probe and Application in the Detection of Fe3+ and Cr2O72−

Preparation of Eu0.075Tb0.925-Metal Organic Framework as a Fluorescent Probe and Application in the Detection of Fe3+ and Cr2O72−

High Proton Conduction in Two Highly Water-Stable Lanthanide Coordination Polymers from a Triazole Multicarboxylate Ligand

Fabrication of a Luminescence-Silent System Based on a Post-Synthetic Modification Cd-MOFs: A Highly Selective and Sensitive Turn-on Luminescent Probe for Ascorbic Acid Detection

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