A new 2-D Bi（3＋） coordination polymer {Bi4（μ3-O）2（μ4-O）2（C7H3NO4）2}n（1,C7H3NO4 = pyridine-2,6-dicarboxylate） containing（6,5）-connected topological sheet with the Schl？fli symbol of（4~4·6~3·8...A new 2-D Bi（3＋） coordination polymer {Bi4（μ3-O）2（μ4-O）2（C7H3NO4）2}n（1,C7H3NO4 = pyridine-2,6-dicarboxylate） containing（6,5）-connected topological sheet with the Schl？fli symbol of（4~4·6~3·8~4·12~4）（4~5·6~4·8） has been synthesized by an ionothermal method using the ionic liquid 1-ethyl-3-methylimidazolium bromide（[Emim]Br） as solvent,and characterized by C,H and N elemental analysis,energy-dispersive X-ray spectroscopy（EDS）,infrared spectrum（IR spectrum） and single-crystal X-ray diffraction.The results indicate that 1 belongs to the monoclinic system,space group P21/n with a = 13.766（7）,b = 4.142（2）,c = 16.439（8） ？,β = 99.099（9）°,Z = 2,V = 925.6（8） ？~3,Dc = 4.414 g·cm^（-3）,F（000） = 1064,μ = 37.985 mm-1,the final R = 0.0326,wR = 0.0727 and S = 1.022.The molecular structural units [Bi4（μ3-O）2（μ4-O）2（C7H3NO4）2] are connected to each other via bridging O atoms,extending into an interesting 2-D layered structure.These resulting layers are further assembled by weak C-H…O hydrogen bonds into a 3-D supramolecular architecture.Moreover,its thermal stability and the luminescent properties have been also studied.展开更多
Two new europium （Ⅲ） coordination polymers formulated as Eu2（H20）a（ox）4]· （CsH6N）2-2H20 （1） and Eu2（ad）3（H20）4]＇0.25H20 （2） （H20x = oxalic acid, H2ad = adipic acid） have been synthesized from ...Two new europium （Ⅲ） coordination polymers formulated as Eu2（H20）a（ox）4]· （CsH6N）2-2H20 （1） and Eu2（ad）3（H20）4]＇0.25H20 （2） （H20x = oxalic acid, H2ad = adipic acid） have been synthesized from the self-assembly of lanthanide ions Eu^3＋ with flexible oxalic and adipic acid ligands, respectively. Structural analyses revealed that complex 1 exhibits three-dimensional metalorganic frameworks, and 2 has intricate two-dimensional interpenetrated metal-organic networks. In addition, the photoluminescent properties of complexes 1 and 2 were discussed in detail, which shows strong red emission, corresponding to ^5Do →^7F？ transition of Eu^3＋ ions.展开更多
A new non-metal 3-D borophosphate compound formulated as(NH4)2[B2P2O8(OH)2](1)has been synthesized by a solvothermal method and characterized by elemental analysis,energy-dispersive X-ray spectroscopy(EDS),IR spectrum...A new non-metal 3-D borophosphate compound formulated as(NH4)2[B2P2O8(OH)2](1)has been synthesized by a solvothermal method and characterized by elemental analysis,energy-dispersive X-ray spectroscopy(EDS),IR spectrum and single-crystal X-ray diffraction.The borophosphate(NH4)2[B2P2O8(OH)2]crystallizes in the cubic system,space group P213 with Z=2,a=b=c=7.586(4)?,V=436.6(4)?3,Mr=281.64,Dc=2.127 g/cm^3,λ=0.71073?,μ=0.551 mm^-1,F(000)=284,R=0.0277 and wR=0.0758 for 262 observed reflections with I>2σ(I)and S=1.082.Its structure is constructed by the connection of PO4 and BO3(OH)tetrahedra to form a 3-D anionic framework containing 4-and 8-membered rings(MRs),with two NH4+cations located in the channels of the 8-membered rings.The N–H…O hydrogen bonds are observed in its packing structure and enhanced the stability of crystal structure.In addition,its thermal stability,UV spectrum and second-order NLO properties have been also investigated.展开更多
Background Hepatectomy is a standard hepatic surgica line with improvements in surgical techniques. This study with hepatectomy. technique. The safety of hepatectomy has been improved in analyzed the operative and per...Background Hepatectomy is a standard hepatic surgica line with improvements in surgical techniques. This study with hepatectomy. technique. The safety of hepatectomy has been improved in analyzed the operative and perioperative factors associated Methods A total of 2008 patients who underwent consecutive hepatectomies between January 1986 and December 2005 were investigated retrospectively. Diagnoses were made based on pathological findings. Results Malignant and benign liver diseases accounted for 58.5% and 41.2%, respectively, of the conditions requiring resections. Primary liver cancers accounted for 76.1% of the malignant tumors, while hilar cholangiocarcinomas accounted for 6.7%. Hemangiomas （41.7%） and hepatolithiasis （29.6%） were the most common of the benign conditions. Microwave in-line coagulation was used in 236 of our liver resection cases. The overall postoperative complication rate was 14.44%, of which 12.54% of resections were performed for primary liver cancer, 16.40% for secondary liver cancer, and 16.32% for hepatolithiasis. The overall hospital mortality was 0.55%, and that for malignant liver disease was 0.51%. A high mortality （2.53%） was associated with extensive liver resections for hilar cholangiocarcinomas （two deaths in 79 cases）. Microwave in-line pre-coagulation resection, Child-Pugh grading, operating time, postoperative length of stay, and preoperative serum albumin level were independent predictors of morbidity. Blood loss, Child-Pugh grading, operating time and preoperative serum albumin level were independent predictors of mortality. Conclusions Hepatectomy can be performed safely with low morbidity and mortality, provided that it is carried out with optimal perioperative management and innovative surgical techniques.展开更多
A novel tetra-nuclear Nd(Ⅲ) coordination polymer, Nd4(μ3-OH)4(μ2-H2O)2(C6H4NO2)6(N3)2(H2O)2(1, C6H4N zide anion), was successfully prepared under hydrothermal conditions and fully characterized by C, H and N elemen...A novel tetra-nuclear Nd(Ⅲ) coordination polymer, Nd4(μ3-OH)4(μ2-H2O)2(C6H4NO2)6(N3)2(H2O)2(1, C6H4N zide anion), was successfully prepared under hydrothermal conditions and fully characterized by C, H and N elemental analysis, IR spectrum, thermal stability and single-crystal X-ray diffraction. It crystallizes in the triclinic system, space group P1, with Z = 1, a = 8.188(3), b = 12.516(5), c = 12.573(5) ?, α = 107.887(1)°, β = 104.681(2)°, γ = 98.086(6)°, V = 1152.2(8) ?3, M3 r = 1533.73, Dc = 2.210 g/cm, λ = 0.71073 ?, μ = 4.524 mm-1, F(000) = 736, R = 0.0332 and wR = 0.0901 for 3954 observed reflections with Ⅰ > 2σ(Ⅰ) and S = 1.071. The molecular structure of polymer 1 is constructed by four Nd3+ cations, four bridging μ3-OH- anions, two bridging μ2-H2 O, six C6 H4 NO2- anions, two linear azide anions and two coordinated water molecules. The structure of polymer 1 can be viewed as a 3-D supra-molecular network constructed by O-H···O and O-H···N hydrogen bonds between the adjacent chains. Moreover, its near-infrared luminescence and luminescence quenching for Cu2+ cation have also been investigated in detail.展开更多
A new binuclear cobalt(Ⅱ)complex,[Co2(C10H6NO2)2(C12H8N2)2(N3)2]·H2O(1,C10H6NO2-:isoquinoline-1-carboxylate,C12H8N2:1,10-phenanthroline(phen);N3-:azide),has been synthesized though a mixed-solvothermal method us...A new binuclear cobalt(Ⅱ)complex,[Co2(C10H6NO2)2(C12H8N2)2(N3)2]·H2O(1,C10H6NO2-:isoquinoline-1-carboxylate,C12H8N2:1,10-phenanthroline(phen);N3-:azide),has been synthesized though a mixed-solvothermal method using the pentanol and distilled water as solvent.The complex was characterized by elemental analysis,IR spectrum and single-crystal X-ray diffraction.It crystallizes in triclinic system,space group P1 with Z=2,a=1.777(5),b=11.815(5),c=17.141(7)?,α=74.496(6)°,β=70.537(6)°,γ=67.861(6)°,V=2055.4(14)?3,Mr=922.66,Dc=1.491 g/cm3,λ=0.71073?,μ=0.870 mm-1,F(000)=942,R=0.0455 and wR=0.1147 for 4960 observed reflections with I>2σ(I)and S=1.129.Its molecular structure is constructed by two Co2+cations,two chelating phen ligands,two chelating isoquinoline-1-carboxylate ligands,two bridging linear azide anions and two uncoordinated half-occupied water molecules.The 3-D supramolecular network results from the multiple hydrogen bonds andπ-πstacking interactions among three types of ligands.More importantly,its thermal stability,luminescent properties and magnetic properties have also been studied in detail.展开更多
基金Project supported by the National Natural Science Foundation of China(No.21601095)
文摘A new 2-D Bi（3＋） coordination polymer {Bi4（μ3-O）2（μ4-O）2（C7H3NO4）2}n（1,C7H3NO4 = pyridine-2,6-dicarboxylate） containing（6,5）-connected topological sheet with the Schl？fli symbol of（4~4·6~3·8~4·12~4）（4~5·6~4·8） has been synthesized by an ionothermal method using the ionic liquid 1-ethyl-3-methylimidazolium bromide（[Emim]Br） as solvent,and characterized by C,H and N elemental analysis,energy-dispersive X-ray spectroscopy（EDS）,infrared spectrum（IR spectrum） and single-crystal X-ray diffraction.The results indicate that 1 belongs to the monoclinic system,space group P21/n with a = 13.766（7）,b = 4.142（2）,c = 16.439（8） ？,β = 99.099（9）°,Z = 2,V = 925.6（8） ？~3,Dc = 4.414 g·cm^（-3）,F（000） = 1064,μ = 37.985 mm-1,the final R = 0.0326,wR = 0.0727 and S = 1.022.The molecular structural units [Bi4（μ3-O）2（μ4-O）2（C7H3NO4）2] are connected to each other via bridging O atoms,extending into an interesting 2-D layered structure.These resulting layers are further assembled by weak C-H…O hydrogen bonds into a 3-D supramolecular architecture.Moreover,its thermal stability and the luminescent properties have been also studied.
基金The project was supported by the scientific and technological department of Henan Province （No. 102300410269）
文摘Two new europium （Ⅲ） coordination polymers formulated as Eu2（H20）a（ox）4]· （CsH6N）2-2H20 （1） and Eu2（ad）3（H20）4]＇0.25H20 （2） （H20x = oxalic acid, H2ad = adipic acid） have been synthesized from the self-assembly of lanthanide ions Eu^3＋ with flexible oxalic and adipic acid ligands, respectively. Structural analyses revealed that complex 1 exhibits three-dimensional metalorganic frameworks, and 2 has intricate two-dimensional interpenetrated metal-organic networks. In addition, the photoluminescent properties of complexes 1 and 2 were discussed in detail, which shows strong red emission, corresponding to ^5Do →^7F？ transition of Eu^3＋ ions.
基金Supported by the National Natural Science Foundation of China(No.21601095)
文摘A new non-metal 3-D borophosphate compound formulated as(NH4)2[B2P2O8(OH)2](1)has been synthesized by a solvothermal method and characterized by elemental analysis,energy-dispersive X-ray spectroscopy(EDS),IR spectrum and single-crystal X-ray diffraction.The borophosphate(NH4)2[B2P2O8(OH)2]crystallizes in the cubic system,space group P213 with Z=2,a=b=c=7.586(4)?,V=436.6(4)?3,Mr=281.64,Dc=2.127 g/cm^3,λ=0.71073?,μ=0.551 mm^-1,F(000)=284,R=0.0277 and wR=0.0758 for 262 observed reflections with I>2σ(I)and S=1.082.Its structure is constructed by the connection of PO4 and BO3(OH)tetrahedra to form a 3-D anionic framework containing 4-and 8-membered rings(MRs),with two NH4+cations located in the channels of the 8-membered rings.The N–H…O hydrogen bonds are observed in its packing structure and enhanced the stability of crystal structure.In addition,its thermal stability,UV spectrum and second-order NLO properties have been also investigated.
文摘Background Hepatectomy is a standard hepatic surgica line with improvements in surgical techniques. This study with hepatectomy. technique. The safety of hepatectomy has been improved in analyzed the operative and perioperative factors associated Methods A total of 2008 patients who underwent consecutive hepatectomies between January 1986 and December 2005 were investigated retrospectively. Diagnoses were made based on pathological findings. Results Malignant and benign liver diseases accounted for 58.5% and 41.2%, respectively, of the conditions requiring resections. Primary liver cancers accounted for 76.1% of the malignant tumors, while hilar cholangiocarcinomas accounted for 6.7%. Hemangiomas （41.7%） and hepatolithiasis （29.6%） were the most common of the benign conditions. Microwave in-line coagulation was used in 236 of our liver resection cases. The overall postoperative complication rate was 14.44%, of which 12.54% of resections were performed for primary liver cancer, 16.40% for secondary liver cancer, and 16.32% for hepatolithiasis. The overall hospital mortality was 0.55%, and that for malignant liver disease was 0.51%. A high mortality （2.53%） was associated with extensive liver resections for hilar cholangiocarcinomas （two deaths in 79 cases）. Microwave in-line pre-coagulation resection, Child-Pugh grading, operating time, postoperative length of stay, and preoperative serum albumin level were independent predictors of morbidity. Blood loss, Child-Pugh grading, operating time and preoperative serum albumin level were independent predictors of mortality. Conclusions Hepatectomy can be performed safely with low morbidity and mortality, provided that it is carried out with optimal perioperative management and innovative surgical techniques.
基金Project supported by the National Natural Science Foundation of China (No. 21601095)。
文摘A novel tetra-nuclear Nd(Ⅲ) coordination polymer, Nd4(μ3-OH)4(μ2-H2O)2(C6H4NO2)6(N3)2(H2O)2(1, C6H4N zide anion), was successfully prepared under hydrothermal conditions and fully characterized by C, H and N elemental analysis, IR spectrum, thermal stability and single-crystal X-ray diffraction. It crystallizes in the triclinic system, space group P1, with Z = 1, a = 8.188(3), b = 12.516(5), c = 12.573(5) ?, α = 107.887(1)°, β = 104.681(2)°, γ = 98.086(6)°, V = 1152.2(8) ?3, M3 r = 1533.73, Dc = 2.210 g/cm, λ = 0.71073 ?, μ = 4.524 mm-1, F(000) = 736, R = 0.0332 and wR = 0.0901 for 3954 observed reflections with Ⅰ > 2σ(Ⅰ) and S = 1.071. The molecular structure of polymer 1 is constructed by four Nd3+ cations, four bridging μ3-OH- anions, two bridging μ2-H2 O, six C6 H4 NO2- anions, two linear azide anions and two coordinated water molecules. The structure of polymer 1 can be viewed as a 3-D supra-molecular network constructed by O-H···O and O-H···N hydrogen bonds between the adjacent chains. Moreover, its near-infrared luminescence and luminescence quenching for Cu2+ cation have also been investigated in detail.
基金Project supported by the National Natural Science Foundation of China (No. 21601095)。
文摘A new binuclear cobalt(Ⅱ)complex,[Co2(C10H6NO2)2(C12H8N2)2(N3)2]·H2O(1,C10H6NO2-:isoquinoline-1-carboxylate,C12H8N2:1,10-phenanthroline(phen);N3-:azide),has been synthesized though a mixed-solvothermal method using the pentanol and distilled water as solvent.The complex was characterized by elemental analysis,IR spectrum and single-crystal X-ray diffraction.It crystallizes in triclinic system,space group P1 with Z=2,a=1.777(5),b=11.815(5),c=17.141(7)?,α=74.496(6)°,β=70.537(6)°,γ=67.861(6)°,V=2055.4(14)?3,Mr=922.66,Dc=1.491 g/cm3,λ=0.71073?,μ=0.870 mm-1,F(000)=942,R=0.0455 and wR=0.1147 for 4960 observed reflections with I>2σ(I)and S=1.129.Its molecular structure is constructed by two Co2+cations,two chelating phen ligands,two chelating isoquinoline-1-carboxylate ligands,two bridging linear azide anions and two uncoordinated half-occupied water molecules.The 3-D supramolecular network results from the multiple hydrogen bonds andπ-πstacking interactions among three types of ligands.More importantly,its thermal stability,luminescent properties and magnetic properties have also been studied in detail.
