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A Highly Efficient Luminescent Metal-Organic Framework with Strong Conjugate Unit for Sensing Small Molecules

Chinese Journal of Chemistry 2022年第11期40卷 1305-1312页

作者： Bi-Lian Chai Hui Xu Teng-Fei Zheng Jing-Lin Chen Sui-Jun Liu Mei-Hui Yu He-Rui Wen School of Chemistry and Chemical Engineering Jiangxi Provincial Key Laboratory of Functional Molecular Materials ChemistryJiangxi University of Science and TechnologyGanzhouJiangxi 341000China School of Materials Science and Engineering TKL of Metal-and Molecule-Based Material Chemistry and Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Nankai UniversityTianjin 300350China

Luminescent metal-organic frameworks(LMOFs)have become a promising class of fluorescence sensing materials,however,the multi-responsive LMOF sensors for organic compounds are rather ***,a water stable and highly efficient luminescent MOF with the formula of{[Zn(BBZB)(2,6-NDC)]-solvents}n(JXUST-10,BBZB=4,7-bis(1H-benzimidazole-1-yl)-2,1,3-benzothiadiazole and 2,6-NDC=2,6-naphthalenedicarboxylate)was constructed by the incorporation of Zn2+and two organic ligands(BBZB and 2,6-NDC)featuring the conjugate ***-10 is a three-dimensional two-fold interpenetrated framework with good fluorescent *** on the luminescent characteristic,JXUST-10 can be used as a multi-responsive sensor for detection of three different ana-lytes including tetracycline,benzaldehyde and uric acid via different luminescent change ***,fluorescence test paper and LED light devices are used to detect analytes through the visual change of luminescence colour of JXUST-10 from blue greenish to yellow greenish under ultraviolet light(365 nm)***,the probable sensing mechanisms for three target analytes were also discussed.

关键词： Metal-organic frameworks Sensors Luminescence Red-shift emission turn-on effect

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Highly selective and turn-on fluorescence probe with red shift emission for naked-eye detecting Al^(3+)and Ga^(3+)based on metal-organic framework

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Chinese Chemical Letters 2022年第1期33卷 541-546页

作者： Linhui Wu Shuli Yao Hui Xu Tengfei Zheng Suijun Liu Jinglin Chen Na Li Herui Wen School of Chemistry and Chemical Engineering Jiangxi University of Science and TechnologyGanzhou 341000China School of Materials Science and Engineering Tianjin Key Laboratory of Metal and Molecule-Based Material ChemistryNankai UniversityTianjin 300350China

A novel ZnII-based metal-organic framework with the formula of{[Zn_(2)(BBIP)_(2)(NDC)_(2)]·H_(2)O}n(JXUST-5)derived from 3,5-bis(benzimidazol-1-yl)pyridine(BBIP)and 1,4-naphthalenedicarboxylic acid(H_(2)NDC)has been *** adjacent Zn^(II)ions are linked through two BBIP ligands to form a[Zn_(2)(BBIP)_(2)]secondary building unit(SBU).The neighbouring SBUs are further connected by NDC^(2-)withμ2-η^(1):η^(1)andμ2-η^(1):η^(1):η^(1)bridging modes to form a two-dimensional(2D)*** analysis shows that JXUST-5 could be simplified as an uninodal fes topology with a point symbol of{4.8^(2)}.Furthermore,the 2D framework net could be extended through C-H···πinteraction to form the three-dimensional supramolecular *** experiments suggest that JXUST-5 could selectively and sensitively recognize Al^(3+)and Ga^(3+)through fluorescence enhancement effect along with a relatively large red *** detection limits for Al^(3+)and Ga^(3+)are 0.17 and 0.69 ppm,***,the sensing process for both Al^(3+)and Ga^(3+)could be directly observed with naked eyes under 365 nm UV ***,JXUST-5 could be recycled at least five times as a fluorescent sensor toward Al^(3+)and Ga^(3+),which is the second example of turn-on MOF based fluorescent sensor toward Ga^(3+).

关键词： Metal-organic frameworks Fluorescence probe Naked-eye detection turn-on effect Red shift emission Al^(3+)and Ga^(3+)

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