Anhydrous EuCl3 reacted with sodium carbon-bridged biphenolate LNa2[ L = 2,2＇-methylene bis（6-tert-butyl-4- methyl-phenoxo ] in a 1 ： 1 molar ratio in THF in the presence of HMPA （HMPA = hexamethylphosphoric triam...Anhydrous EuCl3 reacted with sodium carbon-bridged biphenolate LNa2[ L = 2,2＇-methylene bis（6-tert-butyl-4- methyl-phenoxo ] in a 1 ： 1 molar ratio in THF in the presence of HMPA （HMPA = hexamethylphosphoric triamide）, then the product formed in situ was reduced by Na-K alloy to generate the divalent carbon-bridged biphenolate europium complex [ LEu （HMPA） 2 ] 2 （THF） 4 （ 1 ） in a good isolated yield. Complex 1 was fully characterized by elemental analysis, NMR and IR spectra, and X-ray structural determination. The crystal data of complex 1 are monoclinic, P2 1/c space group, a=1.6521（3） nm, b=2.8274（3） nm, c=1.2074（2） nm, β=111.723（6）°, V=5.2393（14） nm^3, Z=2, Dc= 1.259 mg·m^-3, μ = 1.304 mm^-1, F（000） = 2092, R = 0.0815, wR = 0. 1723. Complex 1 is a dimer with two Eu - O bridges. The coordination geometry of each europium atom can be best described as a distorted trigonal bipyramid.展开更多
A novel phosphonate-based chiral metal-organic framework 1 was synthesized from C2-symmetric 1,1？-biphenol-based ligand and structurally characterized by single-crystal and powder X-ray diffraction, Fourier-transform...A novel phosphonate-based chiral metal-organic framework 1 was synthesized from C2-symmetric 1,1？-biphenol-based ligand and structurally characterized by single-crystal and powder X-ray diffraction, Fourier-transform infrared spectra（FTIR）, circular dichroism（CD） and thermogravimetric analyses（TGA）. Two neighboring Mn ions are linked by two carboxylate groups and one phosphate group to form a di-manganese unit [Mn2] and each [Mn2] cluster in 1 is linked by five ligands, generating a 3D network with fns topology. In addition, the photoluminescence properties of 1 and H4 L were investigated.展开更多
An efficient electrochemical access to the non-symmetric biphenols using tri(p-bromophenyl)amine(TBPA)as a redox mediator has been developed.The electrochemical protocol features highly selective cross-coupling produc...An efficient electrochemical access to the non-symmetric biphenols using tri(p-bromophenyl)amine(TBPA)as a redox mediator has been developed.The electrochemical protocol features highly selective cross-coupling products in up to 83% yield,instead of forming homo-coupling ones.展开更多
文摘Anhydrous EuCl3 reacted with sodium carbon-bridged biphenolate LNa2[ L = 2,2＇-methylene bis（6-tert-butyl-4- methyl-phenoxo ] in a 1 ： 1 molar ratio in THF in the presence of HMPA （HMPA = hexamethylphosphoric triamide）, then the product formed in situ was reduced by Na-K alloy to generate the divalent carbon-bridged biphenolate europium complex [ LEu （HMPA） 2 ] 2 （THF） 4 （ 1 ） in a good isolated yield. Complex 1 was fully characterized by elemental analysis, NMR and IR spectra, and X-ray structural determination. The crystal data of complex 1 are monoclinic, P2 1/c space group, a=1.6521（3） nm, b=2.8274（3） nm, c=1.2074（2） nm, β=111.723（6）°, V=5.2393（14） nm^3, Z=2, Dc= 1.259 mg·m^-3, μ = 1.304 mm^-1, F（000） = 2092, R = 0.0815, wR = 0. 1723. Complex 1 is a dimer with two Eu - O bridges. The coordination geometry of each europium atom can be best described as a distorted trigonal bipyramid.
基金Supported by NSFC(No.21431004,21522104 and 21620102001)“973”Program(No.2014CB932102 and 2016YFA0203400)+1 种基金the Shanghai“Eastern Scholar”Program SSTC-14YF1401300the Key Project of Basic Research of Shanghai(17JC1403100)
文摘A novel phosphonate-based chiral metal-organic framework 1 was synthesized from C2-symmetric 1,1？-biphenol-based ligand and structurally characterized by single-crystal and powder X-ray diffraction, Fourier-transform infrared spectra（FTIR）, circular dichroism（CD） and thermogravimetric analyses（TGA）. Two neighboring Mn ions are linked by two carboxylate groups and one phosphate group to form a di-manganese unit [Mn2] and each [Mn2] cluster in 1 is linked by five ligands, generating a 3D network with fns topology. In addition, the photoluminescence properties of 1 and H4 L were investigated.
基金grants from the National Key Technology R&D Program(No.2016YFD0400801)the National Natural Science Foundation of China(No.21871019).
文摘An efficient electrochemical access to the non-symmetric biphenols using tri(p-bromophenyl)amine(TBPA)as a redox mediator has been developed.The electrochemical protocol features highly selective cross-coupling products in up to 83% yield,instead of forming homo-coupling ones.
