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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]

A novel multifunctional chemical sensor Mn-based LMOF, namely, [Mn(tipe) 4 (ndc)Cl] n (LMOF-1) was solvothermally synthesized by introducing an aggregation-induced emission luminogens (AIEgens) ligand, 1,1,2,2-tetrakis(4-(1H -imidazole-1-yl)-phenyl)ethane, and analyzed by single crystal X-ray diffraction, thermogravimetric and powder X-ray diffraction and other methods. The analysis of the structure showed that LMOF-1 crystallized in a monoclinic system, P2 1 /n space group. LMOF-1 has high stability and strong luminescence properties in solutions. The sensing experiments testify that it can be used as a selectively multifunctional sensor for Fe3+, CrO 4 2− and Cr 2 O 7 2−, with high quenching coefficient (Ksv) values at 11924 ​M−1, 16078 ​M−1 and 18744 ​M−1, respectively. Noticeably, there found that the Ksv value of Cr 2 O 7 2− was the highest among published literature. A novel Mn-based LMOF, [Mn(tipe) 4 (ndc)Cl] n (LMOF-1), was solvothermally synthesized by introducing an AIE luminogens ligand. It has high stability and strong luminescence properties in water and can be used as a multifunctional sensor for Fe3+, CrO 4 2− and Cr 2 O 7 2−. [Display omitted] • A novel multifunctional chemical sensor Mn-based LMOF-1 was solvothermally synthesized by introducing an AIEgens ligand. • LMOF-1 has high stability and strong luminescence properties. • It can be used as a selectively multifunctional sensor for Fe3+, CrO 4 2− and Cr 2 O 7 2−, with high quenching coefficient values. • The Ksv value of Cr 2 O 7 2− was the highest among published literature. [ABSTRACT FROM AUTHOR]

• A novel AIEgens Mn-based LMOF (LMOF-1) has been solvothermally synthesized. • LMOF-1 has good stability in water. • LMOF-1 shows high selectivity and sensitivity in detecting Al3+. • LMOF-1′s LOD is 1.77×10−7M in detecting Al3+ in water. • Its LOD is the highest value to meet WHO's standard for detecting Al3+ in drinking water. Photoluminescence chemical sensors based on metal-organic frameworks have excellent applications in detecting heavy metal ions in water systems due to their advantages such as good sensitivity and short response time. Herein, a novel AIEgens Mn-based LMOF, [Mn(tipe) 4 (bpdc) 2 ] n (LMOF-1) (tipe = 1,1,2,2-tetrakis(4-(1H-imidazol-1-yl)phenyl)ethene, bpdc = [1,1′-biphenyl]-4,4′-dicarboxylic acid), was synthesized by solvothermal method, and characterized by X-ray single crystal diffraction, elemental analysis and powder X-ray diffraction. Suprisingly, LMOF-1 has good stability in water and shows high selectivity and sensitivity in detecting Al3+ by significantly fluorescence-enhanced phenomenon with its LOD at 1.77×10−7M, which can meet the World Health Organization (WHO) standard for detecting Al3+ in drinking water. This work provides insights into the potential applications of Mn-based MOFs in chemical sensing. [Display omitted] [ABSTRACT FROM AUTHOR]

Three novel inorganic-organic hybrid materials, [PbI 3 (BTA-1)] n (1) (BTA-1 = N -((1 H -benzotriazole-1-yl)methyl)- N , N -dimethyl ethylammonium)，[Cu 2 I 3 (BTA-2)] n (2) (BTA-2 = 1-(1 H -benzotriazole-1-yl)- N , N , N -trimethylammonium carbamate) and [ZnI 3 (BTA-3)] n (3) (BTA-3 = 3-(1 H -benzotriazole-1-yl)- N , N , N -trimethylpropane-1-ammonium), have been was prepared by a solvent volatilization method. All three complexes have been characterized by single-crystal X-ray diffraction, powder X-ray diffraction (PXRD) and thermogravimetric (TG) analysis. Based on different metal iodides, they stack in different structural modes with different cluster cores, such as [PbI 6 ]2- in complex 1 , [Cu 4 I 6 ]2- in complex 2 and [ZnI 3 N]2- in complex 3. The fluorescence analysis show that complex 1 and 2 produced green light when the excitation wavelength was 318 nm and 328 nm, respectively. While complex 3 exhibited near white light when the excitation wavelength was 424 nm (CIE: 0.332, 0.395). It shows that complex 3 can be used as a white light emitting material for direct blue light excitation. By solvent volatilization method, three late-model inorganic-organic hybrid materials, [PbI 3 (BTA-1)] n (1)，[Cu 2 I 3 (BTA-2)] n (2) and [ZnI 3 (BTA-3)] n (3) (BTA = 1 H -benzotriazole), have been prepared. The fluorescence properties showed that complex 1 and 2 produced green light respectively. While complex 3 exhibited near white light (CIE: 0.332,0.395). It shows that complex 3 can be used as a white light emitting material for direct blue light excitation. [Display omitted] • Three luminescent inorganic-organic hybrid materials, 1 – 3 , have been was prepared by a solvent volatilization method. • Based on different metal iodides, they stack in different structural modes with different cluster cores, such as [PbI 6 ]2- in 1 , [Cu 4 I 6 ]2- in 2 and [ZnI 3 N]2- in 3. • This regulation realize complexes' emission from green light to near-white light. • Complex 3 exhibited near white light when excited at 424 nm. It shows 3 can be used as a white light emitting material for direct blue light excitation. [ABSTRACT FROM AUTHOR]