Photoresponsivity and antibiotic sensing properties of an entangled tris(pyridinium)-based metal–organic framework

Li, Peng; Guo, Meng-Yue; Gao, Lijun; Yin, Xiufeng; Yang, Shuqing; Bu, Ran; Gao, En‐Qing

doi:10.1039/d0dt00397b

Cited by 33 publications

(19 citation statements)

References 64 publications

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“…The pristine sample is ESR silent. However, Xe‐light illumination leads to a sharp signal with g =2.0034 (Figure 2b), which is very close to that expected for free electron [4e,7a,11a,15] . The results clearly indicate photogeneration of free radicals.…”

Section: Resultssupporting

confidence: 76%

Metal‐Organic Frameworks with Novel Catenane‐like Interlocking: Metal‐Determined Photoresponse and Uranyl Sensing

Guo

Yang

et al. 2021

Chemistry A European J

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The assembly of two tripyridinium‐tricarboxylate ligands and different metal ions leads to seven isostructural MOFs, which show novel 2D→2D supramolecular entanglement featuring catenane‐like interlocking of tricyclic cages. The MOFs show tripyridinium‐afforded and metal‐modulated photoresponsive properties. The MOFs with d10 metal centers (1‐Cd, 1‐Zn, 2‐Cd, 2‐Zn) show fast and reversible photochromism and concomitant fluorescence quenching, 1‐Ni displays slower photochromism but does not fluoresce, and 1‐Co and 2‐Co are neither photochromic nor fluorescent. It is shown here that the network entanglement dictates donor‐acceptor close contacts, which enable fluorescence originated from interligand charge transfer. The contacts also allow photoinduced electron transfer, which underlies photochromism and concomitant fluorescence response. The metal dependence in fluorescence and photochromism can be related to energy transfer through metal‐centered d‐d transitions. In addition, 1‐Cd is demonstrated to be a potential fluorescence sensor for sensitive and selective detection of UO22+ in water.

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Section: Resultssupporting

confidence: 76%

Metal‐Organic Frameworks with Novel Catenane‐like Interlocking: Metal‐Determined Photoresponse and Uranyl Sensing

Guo

Yang

et al. 2021

Chemistry A European J

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“…Fluorescence lifetime is an important parameter for judging the mechanism of fluorescence quenching [ 80 ]. We investigated the fluorescence lifetimes for the suspensions of 1 with the addition of NFT or l -Tyr at room temperature, as shown in Figure 6 and Table 1 .…”

Section: Resultsmentioning

confidence: 99%

Solvothermal Preparation of a Lanthanide Metal-Organic Framework for Highly Sensitive Discrimination of Nitrofurantoin and l-Tyrosine

et al. 2021

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Metal-organic frameworks (MOFs) have been rapidly developed for their broad applications in many different chemistry and materials fields. In this work, a multi-dentate building block 5-(4-(tetrazol-5-yl)phenyl)-isophthalic acid (H3L) containing tetrazole and carbolxylate moieties was employed for the synthesis of a two-dimensional (2D) lanthanide MOF [La(HL)(DMF)2(NO3)] (DMF = N,N-dimethylformamide) (1) under solvothermal condition. The fluorescent sensing application of 1 was investigated. 1 exhibits high sensitivity recognition for antibiotic nitrofurantoin (Ksv: 3.0 × 103 M−1 and detection limit: 17.0 μM) and amino acid l-tyrosine (Ksv: 1.4 × 104 M−1 and detection limit: 3.6 μM). This work provides a feasible detection platform of 2D MOFs for highly sensitive discrimination of antibiotics and amino acids.

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“…Therefore, the possibility of resonance energy transfer depends on the spectral overlap between the analyte absorption band and the compound's emission band. 55,56 As supported by the UV-vis spectra of the antibiotics and 1, the absorption band of ONZ has the highest degree of overlap with the emission spectrum of 1 at 408 nm with NFT and NFZ following after. Hence, there exists resonance energy transfer (RET) between the nitro-antibiotics and the complex.…”

Section: Mechanism Of Sensing Of Nitro Antibioticsmentioning

confidence: 89%

Highly efficient fluorescent chemosensor for nitro antibiotic detection based on luminescent coordination polymers with 2,6-di(4-carboxyphenyl)pyrazine

Sun

et al. 2021

CrystEngComm

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Photoresponsivity and antibiotic sensing properties of an entangled tris(pyridinium)-based metal–organic framework

Abstract: Novel 2D → 2D entanglement affords close donor–acceptor contacts for electron transfer based photochromism and photomodulable fluorescence of a MOF, which also serves as a regenerable and sensitive luminescent sensor for nitrofuran antibiotics.

Cited by 33 publications

References 64 publications

Metal‐Organic Frameworks with Novel Catenane‐like Interlocking: Metal‐Determined Photoresponse and Uranyl Sensing

Metal‐Organic Frameworks with Novel Catenane‐like Interlocking: Metal‐Determined Photoresponse and Uranyl Sensing

Solvothermal Preparation of a Lanthanide Metal-Organic Framework for Highly Sensitive Discrimination of Nitrofurantoin and l-Tyrosine

Highly efficient fluorescent chemosensor for nitro antibiotic detection based on luminescent coordination polymers with 2,6-di(4-carboxyphenyl)pyrazine

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