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Six functional metal-organic frameworks build by 4,4'-(1H-1,2,4-triazol-1-yl)methylenebis (benzonic acid) (H 2 tmlb), namely: [Zn 4 (tmlb) 4 (H 2 O)] n (1), [Ni 4 (tmlb) 4 (H 2 O)] n (2), [Cu(tmlb)] n (3), [Co(tmlb)] n (4), [Pb(tmlb)(H 2 O)] n (5), {[Zn(tmlb)(H 2 tmlb)]H 2 O} n (6), have been successfully synthesized. The X-ray diffraction analysis show that the complexes 1 and 2 exhibited a two interpenetrating (3, 6, 6)-connected framework with a Schläfli symbol of (4·62) 2 (42·610·83) topology. The complexes 3 and 4 show a two interpenetrating (3, 6)-connected net with (611·84) (63) 2 topology. The complex 5 shows a (3, 8)-connected network with a point symbol of (4·62) 2 (4 2 ·615·78·8·92) topology. The complex 6 exists a 2-fold interpenetrating topology framework and the point symbol is (6·6·6). Moreover, the photocatalytic studies show that complexes 1 – 5 have highly photocatalytic ability to degrade methylene blue (MB). In addition, the complex 6 can efficiently adsorb Congo red through H-bonds and the adsorption kinetic have been discussed. A series of metal-organic frameworks based on N -heterocyclic carboxylic acid ligands can efficiently remove MB and CR from waste water. Image 1 • Six complexes based on N -heterocyclic carboxylic acid ligands were successful synthesized. • Complex can efficiently adsorb Congo red through H-bonds and rapidly release in DMSO solution under a short time. • Complex can rapidly degrade methylene blue under UV light. [ABSTRACT FROM AUTHOR]

Abstract Six functional metal-organic frameworks constructed from semi-flexible 4,4′-bis(imidazolyl)diphenyl ether (bidpe), namely: [Zn(bidpe)(mpa)] n (1), [Cu(bidpe)(mpa)(H 2 O)] n (2), [Cd(bidpe)(mpa)] n (3), [Zn 1.5 (bidpe) 2 (smpa)(H 2 O)] n (4), [Cu 1.5 (bidpe) 2 (smpa)(H 2 O)] n (5), [Cd(bidpe)(hmpa)] n (6) (H 2 mpa = m-Phthalic acid, H 2 smpa = 5-sulfonatobenzene-1,3-dicarboxylate, H 2 hmpa = 5-Hydroxyisophthalic acid), have been synthesized under solvothermal conditions. Single-crystal X-ray diffraction analysis reveals that complexes 1 – 4 and 6 show 2D→3D supramolecular structure with a Schläfli symbol of (44·62), (4·65), (44·62), (42·6) and (63) topology, respectively. Complex 5 possesses an unprecedented (3, 4, 6)-connected 3D framework with a Schläfli symbol of (4·64·8) 2 (42·64·89)(62·8) 2. Meanwhile, complexes 1 , 3 , 4 and 6 have excellent fluorescence properties and can be used as potential luminescent sensors for sensing Cr(VI) anions, Fe(III) ions and nitrobenzene (NB) with high selectivity and sensitivity. The photocatalytic studies indicate that 1 has good photocatalytic capability in degradation of methylene blue (MB), 1 and 6 have good photocatalytic capability in degradation of methyl violet (MV). Furthermore, the possible sensing mechanism and photocatalytic mechanism have been discussed. Graphical abstract Six functional metal-organic frameworks constructed from semi-flexible 4,4′-bis(imidazolyl)diphenyl ether. fx1 [ABSTRACT FROM AUTHOR]

Correction for ‘Four Co(ii) coordination polymers based on 4,4′-(1H-1,2,4-triazol-1-yl)methylenebis(benzoic acid): syntheses, structural diversity, magnetic properties, dye adsorption and photocatalytic properties’ by Zi-ao Zong et al., CrystEngComm, 2019, DOI: URL URL="HTTP://DX.DOI.ORG/10.1039/C8CE01203B"10.1039/c8ce01203b/URL. [ABSTRACT FROM AUTHOR]

• Zn-MOF material named [Zn(L)] n was successfully synthesized by solvothermal method. • Zn-MOF exhibits a utp uninodal 3-connected 3D 2-interpenetrating framework with the point symbol (103). • Zn-MOF is a potential fluorescent material that can selectively and sensitively fluorescent sensing NB. Nitrobenzene (NB) can cause serious harm to ecosystems and human health. In order to identify and detect NB effectively, a micro-porous Zn-based metal-organic framework (Zn-MOF) material was prepared. Zn-MOF material named [Zn(L)] n was successfully synthesized by solvothermal method, using 1,3,5-tris (3-carboxy-triazole-methylene)-2,4,6-tritoluene (H 3 L) as organic ligand. Its stucture was characterized by X-ray single-crystal diffraction, elemental analysis, IR spectra and thermogravimetric (TG) analysis. X-ray single-crystal diffraction analysis exhibits that Zn-MOF belongs to the orthorhombic crystal system, space group P bcn. The central Zn(II) ion exhibits a octahedron {ZnN 3 O 3 } coordination geometry. Topological analysis shows that Zn-MOF exhibits a utp uninodal 3-connected 3D 2-interpenetrating framework with the point symbol (103). Furthermore, the fluorescence quenching experimental results show that Zn-MOF is a potential fluorescent material that can selectively and sensitively fluorescent sensing NB. A Zn-MOF was successfully synthesized. The fluorescence quenching experimental results show that Zn-MOF is a potential fluorescent material that can selectively and sensitively fluorescent sensing NB. Image, graphical abstract [ABSTRACT FROM AUTHOR]