Enhanced luminescence of NH2-UiO-66 for selectively sensing fluoride anion in water medium

Zhu, Haiyan; Huang, Jian; Zhou, Qingya; Lv, Zhiwei; Li, Cuiyu; Hu, Gang

doi:10.1016/j.jlumin.2018.12.007

Cited by 86 publications

(36 citation statements)

References 54 publications

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“…33 Excitingly, we discovered that CO 3 2− can increase the PL signal by 1210%. The addition of F − to UiO-66-NH 2 increases the PL intensity by 444%, consistent with a related finding by Zhu et al 7 It is important to note that the PL enhancement effect is only observed when CO 3 2− and F − are applied (see Figure S7), but the addition of their related anions (CH 3 COO − and Cl − ) does not affect the PL signal. From our binding comparative study, UiO-66-NH 2 can selectively uptake CO 3 2− from a mixture of CO 3 2− and CH 3 COO − and F − from a mixture of F − and Cl − as the PL increments match with the addition of a single anion (CO 3 2− or F − ).…”

Section: ■ Results and Discussionsupporting

confidence: 89%

Guest-Anion-Induced Rotation-Restricted Emission in UiO-66-NH₂ and Advanced Structure Elucidation

et al. 2021

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We report the guest-anion-induced photoluminescence enhancement of metal–organic frameworks (UiO-66-NH2), first based upon diffraction and computational evidence. We found that only limited anions, namely, carbonate and fluoride, can lead to a significant enhancement in photoluminescence, whereas their related anions, such as acetate and chloride, cannot. The optimized crystal structures reveal that the guest carbonate and fluoride ions interact with four framework amino functional groups through hydrogen bonding (ca. 1.6–1.7 Å) that ultimately forms a quaternary (−N(H))4···X– molecular bridge around the nodal center. Hence, the hydrogen-bonded molecular bridge not only restricts the intermolecular C–C rotation of the linker molecules but also greatly perturbs the electronic densities between the guest anions and the framework amino groups.

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Section: ■ Results and Discussionsupporting

confidence: 89%

Guest-Anion-Induced Rotation-Restricted Emission in UiO-66-NH₂ and Advanced Structure Elucidation

et al. 2021

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“…6a and b) could be observed, which not only demonstrated the adsorption of Lys/Arg into the pores of UiO-66-NH 2 , but also implied the existence of hydrogen bonding interactions between Lys/Arg and UiO-66-NH 2 . 6,35 It has been reported that the weakened emission of UiO-66-NH 2 , compared with the organic ligand due to the ligand-to-metal charge transfer (LMCT), could be recovered by addition of phosphate through the interactions between the analyte and UiO-66-NH 2 . 34 Furthermore, its sensing capacity towards Lys and Arg under different pH was examined as well and the results revealed that the sensing performance was weakened signicantly at pH ¼ 2 (Fig.…”

Section: Resultsmentioning

confidence: 99%

Amino group dependent sensing properties of metal–organic frameworks: selective turn-on fluorescence detection of lysine and arginine

et al. 2020

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“…On the other hand, fluorescent sensors, especially based on metal–organic frameworks (MOFs), have offered many advantages and unique properties of high sensitivity, superselectivity, lower detection, and quantification limits and can also be used for anion live cell imaging. 7 , 21 , 26 − 30 …”

Section: Introductionmentioning

confidence: 99%

“… 12 12 Zhu et al mentioned that the luminescence of NH 2 -UiO-66 can be used for F – detection in water medium with a LOD of 0.229 mg/L. 21 Zhao et al showed the incorporation of fluorescent molecules in a zirconium-based (UiO-66)-MOF for F – detection in aqueous solutions with a LOD of 4.4 × 10 –3 mM. 27 Mantasha et al prepared a porous Cu(II)-MOF and used it as a F – sensor with a LOD of 1.203 ppb.…”

Section: Introductionmentioning

confidence: 99%

Selective and Fast Detection of Fluoride-Contaminated Water Based on a Novel Salen-Co-MOF Chemosensor

Alhaddad

El‐Sheikh

2021

ACS Omega

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The development of selective and fast optical sensitive chemosensors for the detection and recognition of different cations and anions in a domain is still a challenge in biological, industrial, and environmental fields. Herein, we report a novel approach for the detection and determination of fluoride ion (F – ) sensing based on a salen-cobalt metal-organic framework (Co(II)-MOF). By a simple method, the Co(II)-MOF was synthesized and characterized using several tools to elucidate the structure and morphology. The photoluminescence (PL) spectrum of the Co(II)-MOF (100.0 nM/L) was examined versus different ionic species like F – , Br – , Cl – , I – , SO 4 2– , and NO 3 – and some cationic species like Mg 2+ , Ca 2+ , Na + , and K + . In the case of F – ions, the PL intensity of the Co(II)-MOF was scientifically enhanced with a remarkable red shift. With the increase of F – concentration, the Co(II)-MOF PL emission spectrum was also professionally enhanced. The limit of detection (LOD) for the Co(II)-MOF chemosensor was 0.24 μg/L, while the limit of quantification (LOQ) was 0.72 μg/L. Moreover, a comparison of the Co(II)-MOF optical approach with other published reports was studied, and the mechanism of interaction was also investigated. Additionally, the applicability of the current Co(II)-MOF approach in different real water samples, such as tap water, drinking water, Nile River water, and wastewater, was extended. This easy-to-use future sensor provides reliable detection of F – in everyday applications for nonexpert users, especially in remote rural areas.

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Enhanced luminescence of NH2-UiO-66 for selectively sensing fluoride anion in water medium

Cited by 86 publications

References 54 publications

Guest-Anion-Induced Rotation-Restricted Emission in UiO-66-NH₂ and Advanced Structure Elucidation

Guest-Anion-Induced Rotation-Restricted Emission in UiO-66-NH₂ and Advanced Structure Elucidation

Amino group dependent sensing properties of metal–organic frameworks: selective turn-on fluorescence detection of lysine and arginine

Selective and Fast Detection of Fluoride-Contaminated Water Based on a Novel Salen-Co-MOF Chemosensor

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Enhanced luminescence of NH2-UiO-66 for selectively sensing fluoride anion in water medium

Cited by 86 publications

References 54 publications

Guest-Anion-Induced Rotation-Restricted Emission in UiO-66-NH2 and Advanced Structure Elucidation

Guest-Anion-Induced Rotation-Restricted Emission in UiO-66-NH2 and Advanced Structure Elucidation

Amino group dependent sensing properties of metal–organic frameworks: selective turn-on fluorescence detection of lysine and arginine

Selective and Fast Detection of Fluoride-Contaminated Water Based on a Novel Salen-Co-MOF Chemosensor

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Guest-Anion-Induced Rotation-Restricted Emission in UiO-66-NH₂ and Advanced Structure Elucidation

Guest-Anion-Induced Rotation-Restricted Emission in UiO-66-NH₂ and Advanced Structure Elucidation