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Covalent organic frameworks (COFs) have been reported in recent years, but their synthesis conditions are often difficult. Herein, a rapid and simple synthesis of a new luminescent COFs at room temperature was obtained. By using the Aggregation-Induced Emission (AIE) chromophore ligand, 4ʹ,4‴,4‴ʺ-nitrilotris(([1,1'-biphenyl]-4-carbaldehyde)) (NBC-CHO), to link p-phenylenediamine through imide bonds, it successfully prepared NBC-PPDA. All the analysis testified NBC-PPDA is a new 2D ordered mesoporous material. The nitrogen atoms and pores in NBC-PPDA can provide coordinate points and passages for metal ions. Noticeable, the AIE core make NBC-PPDA showed a good naked-eye selectivity on low concentrations of Fe3+ within ppm level. It means NBC-PPDA is a good fluorescence sensor for Fe3+ ions. [ABSTRACT FROM AUTHOR]

Two new LMOFs, [Cd9(BTA)6(5-tbuip)6O2]n (LMOF-1) and [Cd3(BTA)2(5-tbuip)2]n (LMOF-2) (BTA = 1H-benzotriazole, 5-tbuip = 5-tert-butylisophthalic acid), have been synthesized by a solvothermal method. The different anions of cadmium salts lead to two isostructural LMOFs. Fe3+ could be detected by LMOF-1 with N-rich sites, which possessed a high quenching coefficient (Ksv) of up to 1.87 × 105 M−1. The Ksv value for the detection of Fe3+ is better than or comparable to those reported in the literature. Since LMOF-2 had a larger pore size compared to that of LMOF-1, it could detect Cr2O72− with a higher Ksv than LMOF-1. In addition, LMOF-1 is closer to white light, which means that it has potential application in white light-emitting diodes (WLEDs). [ABSTRACT FROM AUTHOR]

Two new title MOFs, [Zn(BTA)2]n (LMOF-1) and [Zn3(BTA)2(5-tbuip)2]n (LMOF-2) (BTA = 1H-benzotriazole, 5-tbuip = 5-tert-butylisophthalic acid), have been synthesized by a solvothermal method. The structures of the two complexes have been determined by single-crystal X-ray diffraction analysis and further characterized by elemental analysis, IR spectroscopy, powder X-ray diffraction (PXRD) and thermogravimetric (TG) analysis. And the calculation of PLATON displays that the porosity values are 15.04% and 18.77%. Fluorescence analysis reveals that the two MOFs generate strong blue luminescence; LMOF-1 and LMOF-2 can be regarded as multiresponsive fluorescence sensors for Fe(III) and Cr(VI) (CrO42−/Cr2O72− ions) detection with high sensitivity and selectivity and a low detection limit in water via fluorescence quenching. It is worth noting that most LMOFs for detecting Ag+ to date are mainly formed with rare earth lanthanide metals, while there are still few Zn-based LMOF probes used in Ag+ detection. LMOF-1 can detect trace Ag+ in water with a low detection limit. In addition, LMOF-1 has excellent water stability and thermal stability, and is an excellent material for detecting Ag+ in daily water samples. [ABSTRACT FROM AUTHOR]

Two new title MOFs, namely [Cd2(TIPA)2(bpodc)2]n (1 or MOF-1), [Cd2(TIPA)2(oba)2]n (2 or MOF-2) (TIPA = tris(4-(1H-imidazol-1-yl)phenyl)amine, bpodc = benzophenone-4,4′-dicarboxylic acid, oba = 4,4′-oxydibenzoic acid), have been synthesized via a solvothermal method. MOF-1 and MOF-2 both have a 2-fold interpenetrating 3D framework, and the calculation of PLATON display that porosity are 18.6% and 19.5%, respectively. Attributing to MOF-2 's uncoordinated carboxylate groups, it exhibits a high sensitivity in detecting Fe3+ with a very large quenching coefficient Ksv up to 27 027 M−1. Moreover, MOF-2 also has potential applications in chemical sensing of CrO42− and Cr2O72−. [ABSTRACT FROM AUTHOR]

A novel two‐dimensional CoII coordination framework, namely poly[(μ2‐biphenyl‐4,4′‐diyldicarboxylato‐κ2O4:O4′){μ2‐bis[4‐(2‐methyl‐1H‐imidazol‐1‐yl)phenyl] ether‐κ2N3:N3′}cobalt(II)], [Co(C14H8O4)(C20H18N4O)]n, has been prepared and characterized by IR, elemental analysis, thermal analysis and single‐crystal X‐ray diffraction. The crystal structure reveals that the compound has an achiral two‐dimensional layered structure based on opposite‐handed helical chains. In addition, it exhibits significant photocatalytic degradation activity for the degradation of methylene blue. [ABSTRACT FROM AUTHOR]

A novel two-dimensional Co II coordination framework, namely poly[(μ 2 -biphenyl-4,4'-diyldicarboxylato-κ 2 O 4 :O 4' ){μ 2 -bis[4-(2-methyl-1H-imidazol-1-yl)phenyl] ether-κ 2 N 3 :N 3' }cobalt(II)], [Co(C 14 H 8 O 4 )(C 20 H 18 N 4 O)] n , has been prepared and characterized by IR, elemental analysis, thermal analysis and single-crystal X-ray diffraction. The crystal structure reveals that the compound has an achiral two-dimensional layered structure based on opposite-handed helical chains. In addition, it exhibits significant photocatalytic degradation activity for the degradation of methylene blue.