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• A novel Pb(II) coordination polymer [Pb(FDPTH)(phen)] (1 ; FDPTH =4,4′ hexafluoroisoprorylidene-diphthalhydrazidate, phen = 1,10-phenanthroline) with 3D network structure was obtained. • The FDPTH ligands derived from the hydrothermal in situ acylation reactions. • Compound 1 is a potential visible light catalyst. • The mechanism of photocatalytic reaction was deeply studied. A new coordination polymer photocatalyst, [Pb(FDPTH)(phen)] (1 ; FDPTH 4,4′ hexafluoroisoprorylidene-diphthalhydrazidate, phen = 1,10-phenanthroline) was synthesized for the frist time. The FDPTH ligand was obtained by the in situ acylation reactions between 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6-FDCA) and N 2 H 4 ·H 2 O for the first time. X-ray single-crystal diffraction analysis showed that FDPTH ligands have a μ 4 -bridging mode in compound 1 , which linking Pb(II) centers to create a 3D network structure. Hirshfeld surface analysis was used to investigate the crystal packing and interactions of compound 1. The catalytic activity of compound 1 for methylene blue (MB) was tested under visible light. The degradation for MB followed a pseudo-first-order kinetic pattern and remained efficient after repeated experimental runs. The active species in catalytic process were discovered by radical trapping experiments. The band gap of compound 1 was determined via UV-vis absorbance spectra and Mott-Schottky plot, and a photocatalytic mechanism was proposed for the degradation process. [Display omitted] A new coordination polymer photocatalyst, [Pb(FDPTH)(phen)] (1 ; FDPTH =4,4′ hexafluoroisoprorylidene-diphthalhydrazidate, phen = 1,10-phenanthroline) was synthesized for the frist time. The FDPTH ligand was obtained by the in situ acylation reactions between 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6-FDCA) and N 2 H 4 ·H 2 O for the first time. X-ray single-crystal diffraction analysis showed that FDPTH ligands have a μ 4 -bridging mode in compound 1 , which linking Pb(II) centers to create a 3D network structure. Hirshfeld surface analysis was used to investigate the crystal packing and interactions of compound 1. The catalytic activity of compound 1 for methylene blue (MB) was tested under visible light. The degradation for MB followed a pseudo-first-order kinetic pattern and remained efficient after repeated experimental runs. The active species in catalytic process were discovered by radical trapping experiments. The band gap of compound 1 was determined via UV-vis absorbance spectra and Mott-Schottky plot, and a photocatalytic mechanism was proposed for the degradation process. [ABSTRACT FROM AUTHOR]

• A novel coordination polymer photocatalyst [Zn(FDPTH)(bpy)] 1 (FDPTH = 4,4′-hexafluoroisoprorylidene-diphthalhydrazidate, bpy = 2,2′-bipyridine) with 2D supramolecular layer was obtained. • FDPTH ligands derived from the hydrothermal in situ acylation reactions. • Compound 1 is a potential visible light catalyst. • The mechanism of photocatalytic reaction is studied deeply. Under the hydrothermal conditions, a novel visible-light-driven coordination polymer photocatalyst [Zn(FDPTH)(bpy)] 1 (FDPTH = 4,4′-hexafluoroisoprorylidene-diphthalhydrazidate, bpy = 2,2′-bipyridine) was luckily obtained for the first time. Note that FDPTH derived from the hydrothermal in situ acylation reactions between 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6-FDCA) and N 2 H 4 ⋅H 2 O. X-ray single-crystal diffraction analysis revealed that the FDPTH ligands exhibit a μ 3 -bridging mode in compound 1 , which link Zn(II) centers into a 1D chained structure with auxiliary ligand. The crystal packing of the synthesized compound was further analyzed using Hirshfeld surface analysis (HSA) to assess the interactions between the crystal packings. The photocatalysis analysis indicates that compound 1 is a potential visible-light-driven photocatalyst. The degradation follows a pseudo-first-order kinetic character and the efficiency has been well preserved after five continuous experimental runs. Trapping radical experiment turned out that the ·OH are active species in the catalytic reaction. The band position of compound 1 was elucidated via UV–vis absorbance spectra and Mott-Schottky plot. Also, the photocatalytic degradation mechanism has been proposed. [Display omitted] [ABSTRACT FROM AUTHOR]

[Display omitted] • The identification of anions in water by LMOFs containing aromatic acids was summarized. • Types of LMOFs were divided into three categories: "turn-on", "turn-off" and "ratiometric". • The mechanism of anion recognition by LMOFs was studied deeply. At present, industrial wastewater and domestic sewage have caused serious water pollution, which not only affects the quality of human life, but also pollutes the ecological environment. Anions exist in water for a long time, causing serious water pollution, especially they are toxic. A new class of organic–inorganic hybrid material called metal–organic framework (MOF) has various benefits including a porous structure, adjustable pore size, and multi-metal sites. It is widely used in adsorption, storage, separation, catalyst and other fields. Aromatic carboxylic acids have many advantages over other N-containing ligand or S- or P- ligands or flexible carboxylic acid ligands. The aromatic ring structure of aromatic carboxylic acid molecules can accumulate π-π with other aromatic rings, which is conducive to enhancing the robustness of the coordination polymer. Aromatic carboxylic acid has a relatively rigid molecular structure, and has more degrees of freedom with other N-containing or S- or P- ligands or flexible carboxylic acid ligands, which is more conducive to the formation of specific spatial structures. Moreover, there are abundant π electrons in the aromatic ring, which provide abundant electrons in the coordination process. Most importantly, different substituents and functional groups can be introduced into the aromatic ring, and coordination polymers with specific properties can be designed and synthesized. By designing ligands and metal ions, MOFs can effectively regulate their luminescence properties, which has incomparable advantages over traditional luminescent materials. This review mainly introduces the detection of anions in water by using the unique fluorescence characteristics of MOFs. According to the changes of fluorescence sensing, detection and identification are divided into fluorescence enhancement "turn-on", fluorescence quenching "turn-off" and ratiometric fluorescence "ratiometric", and the detection mechanism of anions is briefly expounded. [ABSTRACT FROM AUTHOR]