Copper-sulfur cluster ions were produced by laser ablation on solid samples: (1) a mixture of copper and sulfur powder, (2) cuprous sulfide compound, (3)cupric suffide compound, respectively. Two main series of cluste...Copper-sulfur cluster ions were produced by laser ablation on solid samples: (1) a mixture of copper and sulfur powder, (2) cuprous sulfide compound, (3)cupric suffide compound, respectively. Two main series of cluster ions were found: (a)[Cu(Cu2S)n]+(n=0-22), (b) [(Cu2S)n]+(n=1-18). The main photodissociation channels of the cluster ions were neutral losses of Cu2S, Cu or CuS. It is obvious that the Cu2S unit plays an important role in the formation and structure of the Cu/S cluster ions, and farthermore, the mied d10 shell eletronic configuration of copper element might be critical to the characteristic of the cluster ions.展开更多
Reaction of(NH 4) 2MoOS 3 with CuBr and AgBr(molar ratio=1∶4∶1) in α-MePy produced dark red crystals of [MoOS 3Cu 4(α-MePy) 6Br 2]. The product was characterized by elemental analysis, IR and X-ray diffraction. It...Reaction of(NH 4) 2MoOS 3 with CuBr and AgBr(molar ratio=1∶4∶1) in α-MePy produced dark red crystals of [MoOS 3Cu 4(α-MePy) 6Br 2]. The product was characterized by elemental analysis, IR and X-ray diffraction. It crystallizes in a triclinic system with space group P1 and unit cell parameters a=0.950 9(3) nm, b=1.066 8(2) nm, c=2.153 6(3) nm, α=94.846(9)°, β=92.054(7)°, γ=99.299(8)°, V=2.145 5(8) nm 3, Z=2, D c=1.828 g·cm -3, F(000)=1 168, μ=42.79 cm -1, R=0.049 and R w=0.051. The compound consists of a nido-shaped MoS 3Cu 3 cluster unit and a four-membered CuBrCuS ring by sharing the same Cu3—S3 bond. The Mo atom and the four Cu atoms adopt a distorted tetrahedral geometry coordination. The Mo…Cu1, Mo…Cu2 and Mo…Cu3 distances are 0.271 1(3), 0 269 8(2), and 0.268 1(1) nm, respectively.展开更多
The structure, spectroscopic properties and chemical stability of [VS4-(CuPPh3)3 (CuCl)Br2] in CDCl3 solution have been studied by multinuclear NMR tech-nique. Two peaks with relative intensity of 1: 4 are found in th...The structure, spectroscopic properties and chemical stability of [VS4-(CuPPh3)3 (CuCl)Br2] in CDCl3 solution have been studied by multinuclear NMR tech-nique. Two peaks with relative intensity of 1: 4 are found in the31P-{1H} spectra.Some 13C-{1H} and 1H NMR peaks have the same integral intensity ratio. These com-plemented the results of 31P-{1H} NMR. The experimental results demonstrates that the PPh3 ligand bound to Cu(6) is not equivalent with the four PPh3 ligands bound toCu(2) ~Cu (5 )- It affords an evidence that the title compound in the solution keepssimilar structure to solid state.展开更多
In this work, with the analysis on MO and electronic structure for a series of heteronuclear cluster with cubane type (Mo4S1 )xMn1(x=1.2. M = Cu, W, Ni, Sb, Mo, Sn, Cu2) we found that it is with the multiple center d-...In this work, with the analysis on MO and electronic structure for a series of heteronuclear cluster with cubane type (Mo4S1 )xMn1(x=1.2. M = Cu, W, Ni, Sb, Mo, Sn, Cu2) we found that it is with the multiple center d-pir orbitals that the ligand Mo3S44+ bonds to the M atom to form these class clusters. It is revealed that the charges transfer from the M atom to Mo atom of the ligand Mo3S44+ and its relationship with the MC (multiple center) d-pπ orbitals. Based on the charge transfer the electronic spectrum and the magnetic property of some cubane clusters have been discussed.展开更多
The title V-Cu-S heterometallic cluster compound C84 H86Cl4Cu6N2O4P4S6V2, crystallizes in the monoclinic space group P21/n with a=16.381(5), b=17.114(3),c=16.749(6) A,β=107. 04(3)°,V=4490(2)A3, Mr=2128.84,Z=2,Dc...The title V-Cu-S heterometallic cluster compound C84 H86Cl4Cu6N2O4P4S6V2, crystallizes in the monoclinic space group P21/n with a=16.381(5), b=17.114(3),c=16.749(6) A,β=107. 04(3)°,V=4490(2)A3, Mr=2128.84,Z=2,Dc=1. 57 g/cm3,μ= 19. 6 cm-1,F(000)=2160. Final R=0.074(Rw=0.082) for 2662 unique reflections with I≥3σ(I). The V atom in the compound retains the tetrahedral geometry of the VS3O with S-V-S or S-V-O angles of 108.6(6)～110.3 (6)°.The cluster core [V2Cu6S6O2] of the compound can be regarded as two cluster cores [VCu3S3O] bonded by bondings of the Cu-Cu'(distances of 2.774(3)～2.707(5) A) and Cu-S (distances of 2.463(7)～2.396(9) A) with centrosymmetric. Atoms of the cluster core V2Cu6 form a distorted cube with the Cu Cu'or the V-Cu distances of 2. 774(3)～2. 707(5) A.展开更多
The safety of nucleic acid staining dyes has long been recognized to be a problem. Extensive efforts have been made to search for alternatives to the most popular but toxic staining dye, ethidium bromide （EtBr）. How...The safety of nucleic acid staining dyes has long been recognized to be a problem. Extensive efforts have been made to search for alternatives to the most popular but toxic staining dye, ethidium bromide （EtBr）. However, so far no staining method that can be guaranteed to be suffidently safe has been developed. In this paper, we report a green staining method of DNA in polyacrylamide gel electrophoresis, where in situ synthesis of DNA-templated fluorescent copper nanoclusters （CuNCs） in the gel is achieved to make the DNA bands visible under UV light. Moreover, a comprehensive study of the performance of this staining method has been conducted and the experimental results show that it has favorable sensitivity, stability, and usability. Meanwhile, in our animal experiments, the two reagents （copper sulfate and ascorbic acid） as well as the synthesized CuNCs have been proven to be non-toxic in contact with skin. In addition, all the reagents employed in this work are readily available and low cost, and the procedure is simple to carry out. Therefore, this novel staining method based on the in situ synthesis DNA-templated fluorescent CuNCs has many potential applications.展开更多
文摘Copper-sulfur cluster ions were produced by laser ablation on solid samples: (1) a mixture of copper and sulfur powder, (2) cuprous sulfide compound, (3)cupric suffide compound, respectively. Two main series of cluster ions were found: (a)[Cu(Cu2S)n]+(n=0-22), (b) [(Cu2S)n]+(n=1-18). The main photodissociation channels of the cluster ions were neutral losses of Cu2S, Cu or CuS. It is obvious that the Cu2S unit plays an important role in the formation and structure of the Cu/S cluster ions, and farthermore, the mied d10 shell eletronic configuration of copper element might be critical to the characteristic of the cluster ions.
文摘Reaction of(NH 4) 2MoOS 3 with CuBr and AgBr(molar ratio=1∶4∶1) in α-MePy produced dark red crystals of [MoOS 3Cu 4(α-MePy) 6Br 2]. The product was characterized by elemental analysis, IR and X-ray diffraction. It crystallizes in a triclinic system with space group P1 and unit cell parameters a=0.950 9(3) nm, b=1.066 8(2) nm, c=2.153 6(3) nm, α=94.846(9)°, β=92.054(7)°, γ=99.299(8)°, V=2.145 5(8) nm 3, Z=2, D c=1.828 g·cm -3, F(000)=1 168, μ=42.79 cm -1, R=0.049 and R w=0.051. The compound consists of a nido-shaped MoS 3Cu 3 cluster unit and a four-membered CuBrCuS ring by sharing the same Cu3—S3 bond. The Mo atom and the four Cu atoms adopt a distorted tetrahedral geometry coordination. The Mo…Cu1, Mo…Cu2 and Mo…Cu3 distances are 0.271 1(3), 0 269 8(2), and 0.268 1(1) nm, respectively.
文摘The structure, spectroscopic properties and chemical stability of [VS4-(CuPPh3)3 (CuCl)Br2] in CDCl3 solution have been studied by multinuclear NMR tech-nique. Two peaks with relative intensity of 1: 4 are found in the31P-{1H} spectra.Some 13C-{1H} and 1H NMR peaks have the same integral intensity ratio. These com-plemented the results of 31P-{1H} NMR. The experimental results demonstrates that the PPh3 ligand bound to Cu(6) is not equivalent with the four PPh3 ligands bound toCu(2) ~Cu (5 )- It affords an evidence that the title compound in the solution keepssimilar structure to solid state.
文摘In this work, with the analysis on MO and electronic structure for a series of heteronuclear cluster with cubane type (Mo4S1 )xMn1(x=1.2. M = Cu, W, Ni, Sb, Mo, Sn, Cu2) we found that it is with the multiple center d-pir orbitals that the ligand Mo3S44+ bonds to the M atom to form these class clusters. It is revealed that the charges transfer from the M atom to Mo atom of the ligand Mo3S44+ and its relationship with the MC (multiple center) d-pπ orbitals. Based on the charge transfer the electronic spectrum and the magnetic property of some cubane clusters have been discussed.
文摘The title V-Cu-S heterometallic cluster compound C84 H86Cl4Cu6N2O4P4S6V2, crystallizes in the monoclinic space group P21/n with a=16.381(5), b=17.114(3),c=16.749(6) A,β=107. 04(3)°,V=4490(2)A3, Mr=2128.84,Z=2,Dc=1. 57 g/cm3,μ= 19. 6 cm-1,F(000)=2160. Final R=0.074(Rw=0.082) for 2662 unique reflections with I≥3σ(I). The V atom in the compound retains the tetrahedral geometry of the VS3O with S-V-S or S-V-O angles of 108.6(6)～110.3 (6)°.The cluster core [V2Cu6S6O2] of the compound can be regarded as two cluster cores [VCu3S3O] bonded by bondings of the Cu-Cu'(distances of 2.774(3)～2.707(5) A) and Cu-S (distances of 2.463(7)～2.396(9) A) with centrosymmetric. Atoms of the cluster core V2Cu6 form a distorted cube with the Cu Cu'or the V-Cu distances of 2. 774(3)～2. 707(5) A.
基金This work was supported by the National Natural Science Foundation of China （Grant No. 21235003 and 61001035）, the National Science Fund for Distinguished Young Scholars （Grant No. 20925520）, the Natural Science Foundation of Shanghai （Grant No. 14ZR1416500）, and the Innovation Program of Shanghai Municipal Education Commission （Grant No. 14YZ026）.
文摘The safety of nucleic acid staining dyes has long been recognized to be a problem. Extensive efforts have been made to search for alternatives to the most popular but toxic staining dye, ethidium bromide （EtBr）. However, so far no staining method that can be guaranteed to be suffidently safe has been developed. In this paper, we report a green staining method of DNA in polyacrylamide gel electrophoresis, where in situ synthesis of DNA-templated fluorescent copper nanoclusters （CuNCs） in the gel is achieved to make the DNA bands visible under UV light. Moreover, a comprehensive study of the performance of this staining method has been conducted and the experimental results show that it has favorable sensitivity, stability, and usability. Meanwhile, in our animal experiments, the two reagents （copper sulfate and ascorbic acid） as well as the synthesized CuNCs have been proven to be non-toxic in contact with skin. In addition, all the reagents employed in this work are readily available and low cost, and the procedure is simple to carry out. Therefore, this novel staining method based on the in situ synthesis DNA-templated fluorescent CuNCs has many potential applications.
