Two Series of Solvent-Dependent Lanthanide Coordination Polymers Demonstrating Tunable Luminescence and Catalysis Properties
摘要:
Two series of lanthanide-organic frameworks with the formulas [Ln(BTATB)(DMF)(2)(H2O)]center dot DMF center dot 2H(2)O (Ln = La (1a), Eu (2a), Tb (3a), Er (4a)) and [Ln(BTATB)(H2O)(2)]center dot 2DMA center dot 4H(2)O (Ln = Er (1b), Yb (2b), Lu (3b)), respectively, were solvothermally synthesized from 4,4',4 ''-(benzene-1,3,5-triyltris(azanediyl))tribenzoate (H(3)BTATB) and Ln(NO3)(3) under DMF or DMA media and characterized by thermogravimetric analyses, IR spectroscopy, X-ray powder diffraction, and single crystal X-ray diffraction. X-ray single-crystal diffraction analyses for these complexes revealed that series A features an interesting 2D interdigitated layer architecture with (6,3) topology. Series B exhibits a 2D bilayer structure. The luminescence properties were studied, and the results showed that complex 3a displayed strong fluorescent emission in the visible region, where the emission intensities of 3a are enhanced upon the addition of Zn2+, demonstrating Zn2+-modulated fluorescence. Yb(III) complex 2b emits typical near-infrared luminescence (983 nm) in DMF (lambda(ex) = 315 nm). The Knoevenagel condensation reaction (benzaldehyde and malononitrile or ethyl cyanoacetate in acetonitrile) was studied using 3a and 2b as catalysts. The results showed that the conversion rates of reactions catalyzed by 3a increased to 99 and 42%, respectively, whereas the reactions catalyzed by 2b exhibited lower conversion rates.
Extension of the Pd-catalyzed C N bond forming reaction to the synthesis of large polydentate ligands containing N H functions
摘要:
The use of Pd(0) mediated C-N coupling reaction for the synthesis of large polydentate ligands functionalized with NH groups is described. The protocol has been applied to the synthesis of polycarboxylic ligands and polypyridyl ligands, starting from common aryl halides containing a central phenyl or biphenyl core as electrophiles. Different aromatic amines or isonicotinamide have been used as nucleophiles. In all cases the ligands have been isolated in high yields and purity. The products have been characterized by means of FTIR, H-1 NMR, C-13{H-1} NMR, EI-MS or CI-MS and elemental analysis. The X-ray structure of N, N'-(biphenyl-4,4'-diyl) diisonicotinamide has also been solved. (C) 2017 Elsevier B.V. All rights reserved.
An anionic metal–organic framework, PCN-99, has been synthesized through a topology-guided strategy; its underlying bor-net is realized by the use of a tetrahedral [In(COO)4]− node and a judiciously designed trigonal planar linker.
The use of Pd(0) mediated C-N coupling reaction for the synthesis of large polydentate ligands functionalized with NH groups is described. The protocol has been applied to the synthesis of polycarboxylic ligands and polypyridyl ligands, starting from common aryl halides containing a central phenyl or biphenyl core as electrophiles. Different aromatic amines or isonicotinamide have been used as nucleophiles. In all cases the ligands have been isolated in high yields and purity. The products have been characterized by means of FTIR, H-1 NMR, C-13H-1} NMR, EI-MS or CI-MS and elemental analysis. The X-ray structure of N, N'-(biphenyl-4,4'-diyl) diisonicotinamide has also been solved. (C) 2017 Elsevier B.V. All rights reserved.
Two Series of Solvent-Dependent Lanthanide Coordination Polymers Demonstrating Tunable Luminescence and Catalysis Properties
作者:Na Wei、Ming-Yang Zhang、Xiao-Nan Zhang、Guang-Ming Li、Xiang-Dong Zhang、Zheng-Bo Han
DOI:10.1021/cg500286v
日期:2014.6.4
Two series of lanthanide-organic frameworks with the formulas [Ln(BTATB)(DMF)(2)(H2O)]center dot DMF center dot 2H(2)O (Ln = La (1a), Eu (2a), Tb (3a), Er (4a)) and [Ln(BTATB)(H2O)(2)]center dot 2DMA center dot 4H(2)O (Ln = Er (1b), Yb (2b), Lu (3b)), respectively, were solvothermally synthesized from 4,4',4 ''-(benzene-1,3,5-triyltris(azanediyl))tribenzoate (H(3)BTATB) and Ln(NO3)(3) under DMF or DMA media and characterized by thermogravimetric analyses, IR spectroscopy, X-ray powder diffraction, and single crystal X-ray diffraction. X-ray single-crystal diffraction analyses for these complexes revealed that series A features an interesting 2D interdigitated layer architecture with (6,3) topology. Series B exhibits a 2D bilayer structure. The luminescence properties were studied, and the results showed that complex 3a displayed strong fluorescent emission in the visible region, where the emission intensities of 3a are enhanced upon the addition of Zn2+, demonstrating Zn2+-modulated fluorescence. Yb(III) complex 2b emits typical near-infrared luminescence (983 nm) in DMF (lambda(ex) = 315 nm). The Knoevenagel condensation reaction (benzaldehyde and malononitrile or ethyl cyanoacetate in acetonitrile) was studied using 3a and 2b as catalysts. The results showed that the conversion rates of reactions catalyzed by 3a increased to 99 and 42%, respectively, whereas the reactions catalyzed by 2b exhibited lower conversion rates.