The self-assembly reactions of [MOS3]^2- （M = W, Mo） with CuS2COCH3 in DMF produced two novel dodecanuclear Mo（W）/Cu/S heterometallic clusters, [Et4N]4[{MOS3}3Cu6S2- （CuS2COCH3）3]·H2O （1： M = W; 2： M = M...The self-assembly reactions of [MOS3]^2- （M = W, Mo） with CuS2COCH3 in DMF produced two novel dodecanuclear Mo（W）/Cu/S heterometallic clusters, [Et4N]4[{MOS3}3Cu6S2- （CuS2COCH3）3]·H2O （1： M = W; 2： M = Mo）. Cluster 1 crystallizes in hexagonal, space group P-62c with a = 16.5612（3）, b = 16.5612（3）, c = 16.4660（5）A, Z = 2, V = 3911.13（16）A^3, Dc = 1.935 g/cm^3, μ（MoKα） = 7.269 mm^-1, F（000） = 2192, the final R = 0.0289 and wR = 0.0789 for 2425 observed reflections （I 〉 2σ（I））. Cluster 2 is isomorphous to 1 with similar crystal parameters. X-ray analysis reveals that both clusters consist of three incomplete cubane-like cluster units {MOS3Cu3S2COCH3}, which are linked together by two μ3-S atoms.展开更多
The polymeric chalcogenide [W2O2S6Cu4(NCMe)4]n (compound 1) was synthesized by the self-assembly reaction of (NH4)2(WOS3) with CuBr in MeCN in the presence of tricyclohexylphosphane (PCy3) under a purified nitrogen at...The polymeric chalcogenide [W2O2S6Cu4(NCMe)4]n (compound 1) was synthesized by the self-assembly reaction of (NH4)2(WOS3) with CuBr in MeCN in the presence of tricyclohexylphosphane (PCy3) under a purified nitrogen atmosphere using standard Schlenk techniques. It gives rise to a novel 1D polymeric compound 1 with solvent MeCN coordinated to the copper atom. This situation is unprecedented in the W(Mo)/Cu/S system. The crystals were characterized by elemental analysis, IR and single-crystal X-ray crystallography. The configuration of the polymeric compound can be viewed as a helical chain which is propagated along the crystallographic c axis. The excited state absorption and refraction of compound 1 in CH3CN solution were studied by using the Z-scan technique with laser pulses of 40 ps pulse-width at a wavelength of 532 nm. The polymeric compound possesses an optical self-focusing performance. The positive nonlinear refraction is attributed to population transitions between singlet states. Compound 1 displays a strong excited-state absorption.展开更多
This paper presents the synthetic and structure studies of molybdenum（tungsten）-copper-sulphur-dialkyldithiocarbamate cluster compounds.The reactions of（M=Mo,W;n=0,2）,CuCl,and R<sub>2</sub>dtc￣-（R<...This paper presents the synthetic and structure studies of molybdenum（tungsten）-copper-sulphur-dialkyldithiocarbamate cluster compounds.The reactions of（M=Mo,W;n=0,2）,CuCl,and R<sub>2</sub>dtc￣-（R<sub>2</sub>=Me<sub>2</sub>,Et<sub>2</sub>,C<sub>4</sub>H<sub>8</sub>,C<sub>5</sub>H<sub>1</sub>0） yield a series of tetra-,hexa-,and heptanuclear cluster compounds.Their spectroscopic properties and the synthetic reaction mechanism are discussed.展开更多
Solvothermal reaction of [WS4]2-with CuCN and trithiocyanuric acid（L1） in orga-nic solvents gave rise to a new W/Cu/S polymer with a 2D anionic network,namely [Et4N]2[WS4Cu3（C3N3S3H1.5）2]（1）.The anionic layer of...Solvothermal reaction of [WS4]2-with CuCN and trithiocyanuric acid（L1） in orga-nic solvents gave rise to a new W/Cu/S polymer with a 2D anionic network,namely [Et4N]2[WS4Cu3（C3N3S3H1.5）2]（1）.The anionic layer of 1 is constructed by the T-shaped {WS4Cu3} subunits as nodes and L1 as linkers and features a（4,4） topology.Both 1 and its isomorphous compound [Et4N]2[MoS4Cu3（C3N3S3H1.5）2]（2） have been fully characterized by X-ray crystal analysis,IR and microanalyses.Compounds 1 and 2 show optical transitions with band gaps of 2.17 and 1.84 eV,respectively.展开更多
基金supported by CAS (SZD08002-2)973 Program (2007CB815306)+1 种基金the NNSFC (20733003 and 20673117)the Young Scientist’s Foundation of Fujian Province (2006F3136)
文摘The self-assembly reactions of [MOS3]^2- （M = W, Mo） with CuS2COCH3 in DMF produced two novel dodecanuclear Mo（W）/Cu/S heterometallic clusters, [Et4N]4[{MOS3}3Cu6S2- （CuS2COCH3）3]·H2O （1： M = W; 2： M = Mo）. Cluster 1 crystallizes in hexagonal, space group P-62c with a = 16.5612（3）, b = 16.5612（3）, c = 16.4660（5）A, Z = 2, V = 3911.13（16）A^3, Dc = 1.935 g/cm^3, μ（MoKα） = 7.269 mm^-1, F（000） = 2192, the final R = 0.0289 and wR = 0.0789 for 2425 observed reflections （I 〉 2σ（I））. Cluster 2 is isomorphous to 1 with similar crystal parameters. X-ray analysis reveals that both clusters consist of three incomplete cubane-like cluster units {MOS3Cu3S2COCH3}, which are linked together by two μ3-S atoms.
基金Project (2005038557) supported by the Post-Doctor Programs Foundation of Ministry of Education of China
文摘The polymeric chalcogenide [W2O2S6Cu4(NCMe)4]n (compound 1) was synthesized by the self-assembly reaction of (NH4)2(WOS3) with CuBr in MeCN in the presence of tricyclohexylphosphane (PCy3) under a purified nitrogen atmosphere using standard Schlenk techniques. It gives rise to a novel 1D polymeric compound 1 with solvent MeCN coordinated to the copper atom. This situation is unprecedented in the W(Mo)/Cu/S system. The crystals were characterized by elemental analysis, IR and single-crystal X-ray crystallography. The configuration of the polymeric compound can be viewed as a helical chain which is propagated along the crystallographic c axis. The excited state absorption and refraction of compound 1 in CH3CN solution were studied by using the Z-scan technique with laser pulses of 40 ps pulse-width at a wavelength of 532 nm. The polymeric compound possesses an optical self-focusing performance. The positive nonlinear refraction is attributed to population transitions between singlet states. Compound 1 displays a strong excited-state absorption.
文摘This paper presents the synthetic and structure studies of molybdenum（tungsten）-copper-sulphur-dialkyldithiocarbamate cluster compounds.The reactions of（M=Mo,W;n=0,2）,CuCl,and R<sub>2</sub>dtc￣-（R<sub>2</sub>=Me<sub>2</sub>,Et<sub>2</sub>,C<sub>4</sub>H<sub>8</sub>,C<sub>5</sub>H<sub>1</sub>0） yield a series of tetra-,hexa-,and heptanuclear cluster compounds.Their spectroscopic properties and the synthetic reaction mechanism are discussed.
基金supported by the State Key Laboratory of Structural Chemistry (CAS,SZD08002-2)National Basic Research Program of China (973 Program,2007CB815306)+2 种基金the National Natural Science Foundation of China (20903096,20733003)Young Scientist’s Foundation of Fujian Province (2006F3163)Knowledge Innovation Program of the Chinese Academy of Sciences
文摘Solvothermal reaction of [WS4]2-with CuCN and trithiocyanuric acid（L1） in orga-nic solvents gave rise to a new W/Cu/S polymer with a 2D anionic network,namely [Et4N]2[WS4Cu3（C3N3S3H1.5）2]（1）.The anionic layer of 1 is constructed by the T-shaped {WS4Cu3} subunits as nodes and L1 as linkers and features a（4,4） topology.Both 1 and its isomorphous compound [Et4N]2[MoS4Cu3（C3N3S3H1.5）2]（2） have been fully characterized by X-ray crystal analysis,IR and microanalyses.Compounds 1 and 2 show optical transitions with band gaps of 2.17 and 1.84 eV,respectively.
