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Zeolite-like metal-organic frameworks (ZMOFs) have attracted a great attention because of their special performances in adsorption and separation. It is still of significant to synthesize new ZMOFs with attractive structural features. In this work, two new anionic MOFs, namely [(Me 2)NH 2 ]·[In(TCM)]·4DMF (JOU-13), and [(Me 2)NH 2 ]·[In(TCM)]·DMF (JOU-14), have been successfully synthesized based on [In(COO) 4 ]- units and flexible tetra-carboxylate ligand (H 4 TCM = Tetrakis(4-carboxyphenoxymethyl)methane). The structures of JOU-13 and JOU-14 were well characterized by single-crystal X-ray diffraction. It is shown that JOU-13 represents a rare example of interpenetrating framework with gis topology, while JOU-14 is a (4,4)-connected dia topological structure. Notably, JOU-13, owning to its porous and anionic skeleton, exhibits outstanding performance in selectively adsorbing and separating cationic dye methylene blue, displaying reversible capabilities in dye adsorption and release. This work provides valuable clues for preparing new anionic zeolite-like MOFs with special properties. Two new MOFs have been successfully synthesized and utilized for separating organic dyes. JOU-13 represents a rare example of zeolite-like anionic framework with gis topology, while JOU-14 show anionic framework with dia topology. [Display omitted] • Two interpenetrated MOFs based on [In(COO) 4 ]- units were successfully prepared. • Both JOU-13 and JOU-14 show anionic frameworks with appropriate window size. • JOU-13 represents a rare example of ionic MOF exhibiting zeolite-like gis topology. • JOU-13 was applied for selective adsorption and separation of methylene blue. [ABSTRACT FROM AUTHOR]

The adsorption of discharged radioactive iodine is considered an important method to address this environmental problem. Metal-organic framework (MOF) materials are expected to be potential materials for capturing iodine. In this work, a new zinc-based MOF, namely [Zn 6 (OH) 6 (DMTDC) 3 (TPB)]·0.5DMF (JOU-31), was successfully prepared under solvothermal condition (H 2 DMTDC = 3,4-dimethylthieno [2,3-b]thiophene-2,5-dicarboxylic acid, TPB = 1,3,5-tris(4-pyridyl)benzene, DMF = N,N-Dimethylformamide). Structural analyses revealed that JOU-31 was a three-dimensional porous structure based on hexanuclear zinc-oxide clusters. Topologically, the framework of JOU-31 can be simplified to a (3,12)-connected net with new Schläfli symbol of {43·630}{43} 2. Due to its large specific surface area, abundant electron-rich N/S sites, and high stability, JOU-31 was applied to capture iodine. The saturated iodine adsorption capacity of JOU-31 in n -hexane solution was 822 mg g−1. In addition, the interaction mechanism between JOU-31 and the adsorbed iodine was further explored in detail. This work provides a valuable clue for the preparation of new MOFs for iodine adsorption. A novel (3,12)-connected Zn-MOF (JOU-31) based on hexanuclear zinc cluster was successfully synthesized. Due to its cage-like pores and large specific surface area, it is used as an iodine capture adsorbent. [Display omitted] • A new MOF based on hexanuclear zinc clusters was prepared under solvothermal condition. • The framework of JOU-31 can be simplified to a (3,12)-connected net with new Schläfli symbol. • The saturated I 2 adsorption capacity of JOU-31 was 822 mg g−1. • The conjugated N/S-containing ligands promote the interaction between MOF skeleton and I 2. [ABSTRACT FROM AUTHOR]

In this work, three kinds of cerium phosphate (CePO 4) with different morphologies, namely rod-like CePO 4 (R–CePO 4), spherical CePO 4 (S–CePO 4), and platelike CePO 4 (P–CePO 4), were successfully hydrothermally synthesized by using Ce-MOFs (MOF ​= ​metal-organic framework) as templates. The CePO 4 materials synthesized by this method not only retain the morphology of Ce-MOFs, but also possess good crystallinity and high specific surface areas, suggesting the universality of this method. Among them, the S–CePO 4 modified glassy carbon electrode (S–CePO 4 @GCE) shows the highest electrochemical activity. When S–CePO 4 @GCE was used to detect metronidazole (MNZ), a wide linear range of 5.0–3980 ​μM, a low detection limit (S/N ​= ​3) of 3.6 ​μM, good stability, and high selectivity could be obtained. This may be due to the good redox properties of cerium, the higher specific surface area of mesoporous S–CePO 4 , and the hydrogen bonding interactions between S–CePO 4 and MNZ. In addition, the constructed electrode S–CePO 4 @GCE can also be used for analyzing MNZ in the real medicines and the water samples. This work provides a useful method to prepare high-efficiency CePO 4 -based electrode materials. Rod-like, spherical and plate-like CePO 4 were synthesized using Ce-BTC, Ce-MOF-808 and Ce 6 -BTB as templates, respectively, and were developed as an electrochemical sensor for metronidazole sensing. [Display omitted] • Rod-like, spherical and platelike CePO 4 were synthesized using three Ce-MOFs as templates. • The spherical CePO 4 (S–CePO 4) synthesized with Ce-MOF-808 has a larger specific surface area. • When S–CePO 4 @GCE is used to electrochemically detect MNZ, it has a lower detection limit and a wider linear range. • The constructed electrode has been successfully applied to the detection of MNZ content in tablets and various water bodies. [ABSTRACT FROM AUTHOR]

Conjugated organic polymers (COPs) have attracted increasing attentions as promising metal-free photocatalysts in the past decade. In this work, two newly designed COPs (An-TATB and An-TPA; An ​= ​anthracene, TATB ​= ​1,3,5-triazine-2,4,6-Triphenyl, TPA ​= ​triphenylamine) were solvothermally synthesized. The conjugated structures of the constructed COPs endow them wide absorption ranges and sufficient photoredox potentials. Then, these constructed COPs are developed as photocatalysts for Cr(VI) reduction and organic pollution degradation in water. Due to the unique donor-acceptor structure, An-TATB showed more efficient photoinduced charge separation and better photocatalytic performances than An-TPA. Importantly, Cr(VI) and organic pollution can be simultaneously removed by An-TATB without any sacrificial agent, oxidant or additional acid. In addition, the reaction active species in pollutant removal process have been studied and the photocatalytic mechanism has also been proposed. This work provides an effective way for the design and construction of new high-efficiency metal-free photocatalysts for wastewater treatment. A newly designed conjugated organic polymer with donor-acceptor skeleton were prepared and developed as an efficient photocatalyst for reducing Cr(VI) and degrading organic pollution in water. [Display omitted] • Two novel conjugated organic polymers were successfully designed as photocatalysts. • An-TATB showed good photocatalytic performances by virtue of its unique donor-acceptor structure. • Cr(VI) and organic pollution can be simultaneously removed by An-TATB without any sacrificial agent, oxidant or acid. • This work provides an effective way for the construction of high-efficiency metal-free photocatalysts. [ABSTRACT FROM AUTHOR]

Cerous phosphate (CePO 4) is attracting increasing attentions due to its potential sensing properties. But so far, the effect of morphology on its electrochemical sensing performance is scarcely reported. In this work, a bowknot-like CePO 4 (B–CePO 4) has been hydrothermally synthesized and characterized using XRD, BET, SEM, TEM, FT-IR spectroscopy and UV–Vis spectroscopy. It was shown that both the reaction time and the amount of urea had an important influence on the formation of CePO 4 bowknots. The constructed B–CePO 4 showed hierarchical structure and enhanced electron transfer ability. Then, it was utilized as an effective sensor for electrochemical sensing of ascorbic acid (AA) with wide linear range of 5.0–2150 ​ μ M, low detect limitation of 0.51 ​ μ M, high selectivity, good repeatability, and high stability. Furthermore, the B–CePO 4 can also be used to detect AA in commercial vitamin tablets. In addition, due to its good fluorescent performance, B–CePO 4 was used for fluorescence detecting of AA. This work provides an effective strategy for exploring new nanomaterials for sensing biomolecules. A bowknot-like cerous phosphate was prepared using a simple hydrothermal method, and was developed as a bifunctional sensor for electrochemical and fluorescent detection of AA. [Display omitted] • Bowknot-like CePO 4 with hierarchical structure was hydrothermally synthesized. • The formation of bowknot-like CePO 4 is closely related to reaction time and the amount of urea. • The bowknot-like CePO 4 was used as a bifunctional sensor for electrochemical and fluorescent AA sensing. • This work provides an effective strategy for exploring new nanomaterials for sensing biomolecules. [ABSTRACT FROM AUTHOR]

A microporous indium-based metal-organic frameworks (MOFs), namely [(CH 3) 2 NH 2 ] 2 [In 2 (H 3 L) 2 (OX)]·3DMF·2H 2 O (JOU-23) (H 3 L ​= ​terphenyl-3, 4′, 5-tricarboxylic acid; OX ​= ​oxalic acid), have been solvothermal synthesized and characterized. Single-crystal X-ray diffraction show that JOU-23 displays three-dimensional anionic framework with 2-fold interpenetrated nets and rare topology. Due to its anionic and porous framework, JOU-23 can be developed for effective absorbing and separating cationic organic dyes. Further studies reveal that both the charge and size of dye molecules would affect the dyes' absorption and separation. In addition, JOU-23 dispersed in dimethyl formamide shows strong emission at about 364 ​nm. Thus, it was developed as an efficient fluorescent sensor for probing Fe3+ ions and nitroaromatic compounds. The detection limit of Fe3+ is as low as 2 ​× ​10−6 ​M (K SV ​= ​59,755 ​M−1), which is excellent in MOFs fluorescent probe. At the same time, JOU-23 shows widespread sensing performance to nitroaromatic compounds. Especially, the detection ability of JOU-23 for nitrobenzene (NB) is good. Although the NB concentration reaches only 4.175 ​× ​10−5 ​M, the quenching efficiency can achieve 86.4%. Further studies show that the quenching performance of JOU-23 is mainly attributed to the competition of excitation light absorption and the absorption of emission light by measured objects. These results indicate that JOU-23 can be applied as a multifunctional material for organic dyes adsorption/separation, Fe3+ ions detection, and nitroaromatic compounds sensing. A microporous anionic 2-fold interpenetrated In(III)-MOF has been synthesized and developed as multifunctional materials for organic dyes adsorption/separation and fluorescent sensitization of Fe3+ ions and nitroaromatic compounds. [Display omitted] • A microporous In-MOF with 2-fold interpenetrated anionic framework has been solvothermal synthesized. • JOU-23 represents a rare (3,6)-connected topology with the Schläfli symbol of (4·62) 2 (42·610·83). • JOU-23 can selective absorption and chromatographic separation of cationic dyes. • JOU-23 has been utilized as an efficient fluorescence "turn-off" sensor for probing Fe3+ ions and nitroaromatic molecules. [ABSTRACT FROM AUTHOR]

Three novel entangled coordination polymers (CPs), namely, [Cu 4 (BPB) 5 (HPW 12 O 40) 2 ]·2H 2 O (JOU-15), [Cu 3 (BPB) 3 PW 12 O 40 ] (JOU-16), and [Cu 3 (BPBP) 3 PW 12 O 40 ] (JOU-17), have been successfully synthesized by combining flexible N-donor ligands and Keggin type polyoxometalates with copper ion under hydrothermal conditions. Structural characterizations show that JOU-15 features an unusual 1D + 1D → 2D entangled network with the coexistence of polycatenation and interdigitation. JOU-16 exhibits a fascinating self-catenated three-dimensional framework with a new point symbol of (44·610·8)(65·8)(66). JOU-17 displays a novel 1D + 3D + 3D → 3D entangled framework with features of both polycatenation and polythreading. In addition, the electrochemical properties of these compounds have also been studied. Three POM-based coordination polymers have been successfully synthesized. JOU-15 shows an unusual 1D + 1D → 2D entanglement with the coexistence of polycatenation and interdigitation. JOU-16 represents a self-catenated 3D framework with new (44·610·8)(65·8)(66) topology. JOU-17 displays a novel 1D + 3D + 3D → 3D entanglement with features of both polycatenation and polythreading. The results of electrochemical experiments indicate that these compounds may be candidates for electrocatalytic nitrite reduction. Image 1 • Three novel entangled coordination polymers were hydrothermally synthesized. • JOU-15 represents the first example of POM-based coordination polymers with both 1D + 1D.→ 2D polycatenated and 1D + 1D → 2D interdigitated phenomenon. • JOU-16 shows an unusual 3D self-catenated framework with a new type of (4,4,5)-connected network. • JOU-17 is the first POM-based CPs with both 3D + 3D.→ 3D interpenetrated and 1D + 3D → 3D polythreading motifs. • All three compounds can effectively electro-catalyze the reduction of nitrite. [ABSTRACT FROM AUTHOR]