Novel Tb-MOF Embedded with Viologen Species for Multi-Photofunctionality: Photochromism, Photomodulated Fluorescence, and Luminescent pH Sensing

Li, Haiyang; Wei, Yibin; Dong, Xi‐Yan; Zang, Shuang‐Quan; Mak, Thomas C. W.

doi:10.1021/cm504350q

Cited by 420 publications

(169 citation statements)

References 64 publications

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“…The UV–vis absorption band of p ‐ASA has none overlap band with the emission characteristic band of BUC‐69 at 580, 591, 616, 651, and 700 nm (Figure b), demonstrating that there was none Förster resonance energy transfer (FRET) existing in the quenching emission process. No obvious red shift or blue shift were found the UV–vis absorption peak of BUC‐69 when contact with p ‐ASA in the suspension (Figure a), implying that there is no PET or DEE interactions in the system . All these findings further confirmed that the sensing mechanism could be assigned to the radiative energy transfer process.…”

Section: Resultssupporting

confidence: 57%

Highly sensitive and selective detect of p‐arsanilic acid with a new water‐stable europium metal–organic framework

Wang

2019

Applied Organom Chemis

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The p‐arsanilic acid (p‐ASA), as an aromatic organoarsenic compounds, had received considerable concerns for their potential toxicity and carcinogenic properties. It was essential to detect p‐ASA with a facile method. In this paper, an europium based fluorescent metal–organic framework (MOF) [Eu2(clhex)·2H2O)]·H2O (BUC‐69) was successfully prepared under hydrothermal conditions with 1,2,3,4,5,6‐cyclohexanehexacarboxylic acid (H6clhex) as organic linker. BUC‐69 displayed superior fluorescence capability to achieve selective and sensitive detection toward p‐ASA in water, which presented the first example of a MOF‐based sensor to detect p‐ASA. BUC‐69 showed excellent chemical stability in solutions under pH ranging from 4 to 12, which makes it be a potential sensor both in acidity and alkalinity condition. Significantly, BUC‐69 performed well in fluorescent sensing of p‐ASA at a low concentration (10−6 M) in the simulated wastewater prepared with real lake water, and the results were comparable to the values detected by Inductively Coupled Plasma Optical Emission Spectrometer (ICP‐OES). The corresponding mechanism of fluorescent sensing toward p‐ASA with BUC‐69 was proposed and affirmed.

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Section: Resultssupporting

confidence: 57%

Highly sensitive and selective detect of p‐arsanilic acid with a new water‐stable europium metal–organic framework

Wang

2019

Applied Organom Chemis

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“…As a new class of fluorescence materials, lanthanide metal‐organic frameworks (LnMOFs) have gathered considerable attention for chemical recognition due to the combination of intrinsic luminescence features and inherent porosity of MOFs. In addition to some crystal materials, chemical sensors based on LnMOFs have been widely investigated to detect metal cations, anions, small molecules, gases, temperatures, pH values, and moisture . The wide sensing applications make luminescence MOFs an important member in the club of “smart materials”.…”

Section: Introductionmentioning

confidence: 99%

Intelligent Molecular Searcher from Logic Computing Network Based on Eu(III) Functionalized UMOFs for Environmental Monitoring

Yan

2017

Adv Funct Materials

107

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By taking advantage of facile preparation and sensitive recognition capacity, the first example of a fluorescence system based on Eu(III) functionalized UiO(bpdc) (UMOFs) has been constructed for effective combination of ions recognition and logic computing. All the ions, including Hg 2+ , Ag + , and S 2− in the system are water harmful, which can be recognized through affecting energy transfer or framework structure. By the self-assembling, competing and connecting with each other, Eu(III)@UMOFs and the ions have achieved the implementation of Boolean logic network system connecting the elementary logic operations (NOR, INH, and IMP) and integrative logic operation (OR + INH), also obtaining computing keypad-lock security system by sequential logic operation. To deal with uncertain information in the analog region of nonlinear response (fluorescence and concentration), soft computation through the formulation of fuzzy logic operation has been constructed. On the basis of Boolean logic and fuzzy logic, one intelligent molecular searcher can be realized by taking chemical events (Hg 2+ , Ag + , and S 2− ) as programmable words and chemical interactions as syntax. Considering the particularity of all the input ions, the approach is helpful in developing the advanced logic program based on Eu(III) @ UMOFs for application in environmental monitoring.

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“…A CP‐based pH sensor molecule should have the functional group that can accept H + or OH – without damaging the framework . Up to now, only few examples of CPs‐based pH fluorescent sensors have been reported, most of which exhibit linear relationships between emission intensities and pH values in certain pH ranges. Some of these pH fluorescent sensors suffer the drawbacks of unconspicuous signal variation and poor reproducibility.…”

Section: Introductionmentioning

confidence: 99%

A Zn(II)‐Containing Coordination Polymer: Synthesis, Crystal Structure and pH Fluorescent Sensing

Wen

Kan

Zhang

et al. 2017

Crystal Research and Technology

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In this work, a Zn(II)-containing coordination polymer, [Zn 2 (2,4tmbpt) 2 (o-bdc) 2 ]·5H 2 O (1) [2,4 -tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3-(4-pyridyl)-5-(2-pyridyl)-1,2,4-triazole and o-H 2 bdc = 1,2benzenedicarboxylic acid] has been synthesized hydrothermally. The structure of the compound has been characterized by single crystal X-ray crystallography, elemental analysis, infrared spectra, thermogravimetric analysis and powder X-ray diffraction analysis. Compound 1 features a 2D layer structure formed by the cross-link of the wave-like chains and helical chains. Because the uncoordinated nitrogen atoms in compound 1 can bind H + , the luminescent spectra of compound 1 in aqueous solutions of different pH from 1 to 7 have been investigated. The result indicates that this compound can be used as a sensitive and efficient pH fluorescent sensor, which can be further used for the design of molecular logic gate in the narrow pH range of 2-3. The pH response mechanism of compound 1 may be the disturbance of the conjugated system resulting from the protonation of the 2,4 -tmbpt ligand in the compound, which has been proved by the UV-vis absorption spectra and density functional theory (DFT) calculation.

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Novel Tb-MOF Embedded with Viologen Species for Multi-Photofunctionality: Photochromism, Photomodulated Fluorescence, and Luminescent pH Sensing

Cited by 420 publications

References 64 publications

Highly sensitive and selective detect of p‐arsanilic acid with a new water‐stable europium metal–organic framework

Highly sensitive and selective detect of p‐arsanilic acid with a new water‐stable europium metal–organic framework

Intelligent Molecular Searcher from Logic Computing Network Based on Eu(III) Functionalized UMOFs for Environmental Monitoring

A Zn(II)‐Containing Coordination Polymer: Synthesis, Crystal Structure and pH Fluorescent Sensing

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