Using N-P-acetamidobenzenesulfonyl-glycine acid (abbreviated as abglyH2) as a ligand, two zinc(II) complexes [Zn(abglyH)2(bipy)2(H2O)2], (1) and {[Znz(abgly)2(bipy)2(H2O)2]. 2(H2O)}n (2) (bipy =...Using N-P-acetamidobenzenesulfonyl-glycine acid (abbreviated as abglyH2) as a ligand, two zinc(II) complexes [Zn(abglyH)2(bipy)2(H2O)2], (1) and {[Znz(abgly)2(bipy)2(H2O)2]. 2(H2O)}n (2) (bipy = 4,4'-bipyridine) have been synthesized under mild conditions and characterized by IR, elemental analysis and X-ray diffraction analysis. Complex 1 is a monomeric compound, which is further assembled by intermolecular hydrogen bonds and π-π interactions into a 3-D supramolecular network. Complex 2 adopts a one-dimensional double chain structure and is further linked by hydrogen bonds to form a 2-D structure. Fluorescent analysis shows that complex 1 has an emissive maximum at 337 nm and complex 2 exhibits an emissive maximum at 339 nm in the solution state at room temperature.展开更多
Three new crystalline compounds 1-3 were successfully obtained by the reactions of 3,3'-dimethoxy-6,6'-dimethyl-2,2'-bipyridine ligand(dmbp) with the corresponding Cu(Ⅰ) salts.Crystal data for 1:orthorhombic ...Three new crystalline compounds 1-3 were successfully obtained by the reactions of 3,3'-dimethoxy-6,6'-dimethyl-2,2'-bipyridine ligand(dmbp) with the corresponding Cu(Ⅰ) salts.Crystal data for 1:orthorhombic Pbca,a = 18.5858(12),b = 8.1821(5),c = 20.6066(13) ,V = 3133.7(3) 3,Z = 8,Dc = 1.843 g/cm3,F(000) = 1696,μ = 3.366 mm-1,the final R = 0.0223 and wR = 0.0542.Crystal data for 2:Orthorhombic Pbca,a = 18.7883(16),b = 8.3249(7),c = 19.0294(17) ,V = 2976.4(4) 3,Z = 8,Dc = 1.731 g/cm3,F(000) = 1552,μ = 4.154 mm-1,the final R = 0.0279 and wR = 0.0680.Crystal data for 3:monoclinic P21/c,a = 13.812(10),b = 9.910(7),c = 23.444(17) ,β = 104.3350(10)°,V = 3090(4) 3,Z = 4,Dc = 1.476 g/cm3,F(000) = 1408,μ = 1.588 mm-1,the final R = 0.0479 and wR = 0.1081.The results of X-ray crystallographic analysis revealed that C14H16ICuN2O2(1) and C14H16BrCuN2O2(2) are isostructural compounds with the dimers connected by C-H···halogen hydrogen bonds to generate a three-dimensional(3D) supramolecular network in 1 and a two-dimensional(2D) sheet structure in 2,respectively,while the mononuclear complex C28H32Cl2Cu2N4O4(3) is ionic.In 3,the [Cu(dmbp)2]+ cations and [ClCuCl]-anions are connected by C-H···Cl hydrogen bonds to form a one-dimensional(1D) chain along the a axis.Therefore,in the three complexes,the C-H···halogen hydrogen bonds dominate their crystal structures.Additionally,The UV luminescent properties of complexes 1-3 were investigated.展开更多
The cytotoxic effect of cadmium is studied by detecting intracellular nicotinamide adenine dinucleotidea(NADH) autofluorescence in this work. NADH autofluorescence in processes of cadmium-induced apoptosis, necrosis...The cytotoxic effect of cadmium is studied by detecting intracellular nicotinamide adenine dinucleotidea(NADH) autofluorescence in this work. NADH autofluorescence in processes of cadmium-induced apoptosis, necrosis and reversible injury are recorded timely. The relativity between time course of NADH autofluorescence and cadmium toxicity is established. The cell toxicity effect of Cadmium on yeast cells is studied by detecting the time courses of intracellular reduced NADH autofluorescence in this work. The relativity between time courses of NADH autofluorescence and Cadmium toxicity is established.展开更多
The isothermal and non-isothermal crystallization kinetics of LCBPP and linear-iPP was investigated by optical microscopy and differential scanning calorimetry (DSC). The optical microscopy results in the isothermal c...The isothermal and non-isothermal crystallization kinetics of LCBPP and linear-iPP was investigated by optical microscopy and differential scanning calorimetry (DSC). The optical microscopy results in the isothermal crystallization process show that the crystals of LCBPP grow slower than the crystals of the linear-iPP. This originates from the low chain mobility, or in other words, the lower chain diffusion rate of LCBPP due to the existence of long side chains. The DSC results in the isothermal crystallization process show that the LCBPP exhibits, however, a higher overall crystallization rate with respect to the linear-iPP. This is related to the higher nucleation ability of LCBPP since the isothermal crystallization process of both LCBPP and linear-iPP are nucleation-dominated. Avrami analysis indicates that the nucleation nature and crystal growth manner of LCBPP and linear-iPP are about the same. The analy- ses of the non-isothermal crystallization processes indicate an increment in crystallization rate with increasing cooling rate. But at any cooling rate, the linear-iPP crystallizes more quickly than the LCBPP. This implies that the non-isothermal crystallization processes of LCBPP and linear-iPP are diffu- sion-dominated, in which the lower chain diffusion rate of LCBPP results in the slower crystallization of it.展开更多
A sample containing different regions with poly(ε-caprolactone)(PCL), oriented polyethylene (PE), and oriented isotactic polypropylene (iPP) films in contact with glass slide has been prepared to be observed in the s...A sample containing different regions with poly(ε-caprolactone)(PCL), oriented polyethylene (PE), and oriented isotactic polypropylene (iPP) films in contact with glass slide has been prepared to be observed in the same view field in an optical microscope and the crystallization of PCL in different regions during cooling from 80 °C down to room temperature at a rate of 1 °C·min^-1 was studied. The results showed that the crystallization of PCL started first at the PE surface and then at the iPP surface, while its bulk crystallization occured much later. This indicates that though both PE and iPP are active in nucleating PCL, the nucleation ability of PE is stronger than that of iPP. This was due to a better lattice matching between PCL and PE than that between PCL and iPP. Moreover, since lattice matching existed between every (hk0) lattice planes of both PCL and PE but only between the (100)PCL and (010)iPP lattice planes, the uniaxial orientation feature of the used PE and iPP films resulted in the existence of much more active nucleation sites of PCL on PE than on iPP. This led to the fact that the nucleation density of PCL at PE surface was so high that the crystallization of PCL at PE surface took place in a way like the film developing process with PCL microcrystallites happened everywhere with crystallization proceeding simultaneously. On the other hand, even though iPP also enhanced the nucleation density of PCL evidently, the crystallization of PCL at iPP surface included still a nucleation and crystal growth processes similar to that of its bulk crystallization.展开更多
Nowadays,the newly interactive metaverse platform,which provides an immersive experience via the virtual reality(VR)technology that integrates the virtual world with the real world,shows huge potential applications in...Nowadays,the newly interactive metaverse platform,which provides an immersive experience via the virtual reality(VR)technology that integrates the virtual world with the real world,shows huge potential applications in all facets of life.展开更多
基金Supported by the NNSFC (Nos. 20471046 and 20771054)Henan Tackle Key Problem of Science and Technology (Nos. 072102270030 and 072102270034)
文摘Using N-P-acetamidobenzenesulfonyl-glycine acid (abbreviated as abglyH2) as a ligand, two zinc(II) complexes [Zn(abglyH)2(bipy)2(H2O)2], (1) and {[Znz(abgly)2(bipy)2(H2O)2]. 2(H2O)}n (2) (bipy = 4,4'-bipyridine) have been synthesized under mild conditions and characterized by IR, elemental analysis and X-ray diffraction analysis. Complex 1 is a monomeric compound, which is further assembled by intermolecular hydrogen bonds and π-π interactions into a 3-D supramolecular network. Complex 2 adopts a one-dimensional double chain structure and is further linked by hydrogen bonds to form a 2-D structure. Fluorescent analysis shows that complex 1 has an emissive maximum at 337 nm and complex 2 exhibits an emissive maximum at 339 nm in the solution state at room temperature.
基金supported by the National Natural Science Foundation of China (No.20872057)
文摘Three new crystalline compounds 1-3 were successfully obtained by the reactions of 3,3'-dimethoxy-6,6'-dimethyl-2,2'-bipyridine ligand(dmbp) with the corresponding Cu(Ⅰ) salts.Crystal data for 1:orthorhombic Pbca,a = 18.5858(12),b = 8.1821(5),c = 20.6066(13) ,V = 3133.7(3) 3,Z = 8,Dc = 1.843 g/cm3,F(000) = 1696,μ = 3.366 mm-1,the final R = 0.0223 and wR = 0.0542.Crystal data for 2:Orthorhombic Pbca,a = 18.7883(16),b = 8.3249(7),c = 19.0294(17) ,V = 2976.4(4) 3,Z = 8,Dc = 1.731 g/cm3,F(000) = 1552,μ = 4.154 mm-1,the final R = 0.0279 and wR = 0.0680.Crystal data for 3:monoclinic P21/c,a = 13.812(10),b = 9.910(7),c = 23.444(17) ,β = 104.3350(10)°,V = 3090(4) 3,Z = 4,Dc = 1.476 g/cm3,F(000) = 1408,μ = 1.588 mm-1,the final R = 0.0479 and wR = 0.1081.The results of X-ray crystallographic analysis revealed that C14H16ICuN2O2(1) and C14H16BrCuN2O2(2) are isostructural compounds with the dimers connected by C-H···halogen hydrogen bonds to generate a three-dimensional(3D) supramolecular network in 1 and a two-dimensional(2D) sheet structure in 2,respectively,while the mononuclear complex C28H32Cl2Cu2N4O4(3) is ionic.In 3,the [Cu(dmbp)2]+ cations and [ClCuCl]-anions are connected by C-H···Cl hydrogen bonds to form a one-dimensional(1D) chain along the a axis.Therefore,in the three complexes,the C-H···halogen hydrogen bonds dominate their crystal structures.Additionally,The UV luminescent properties of complexes 1-3 were investigated.
基金Supported by the National Natural Science Foundation of China (20275027)
文摘The cytotoxic effect of cadmium is studied by detecting intracellular nicotinamide adenine dinucleotidea(NADH) autofluorescence in this work. NADH autofluorescence in processes of cadmium-induced apoptosis, necrosis and reversible injury are recorded timely. The relativity between time course of NADH autofluorescence and cadmium toxicity is established. The cell toxicity effect of Cadmium on yeast cells is studied by detecting the time courses of intracellular reduced NADH autofluorescence in this work. The relativity between time courses of NADH autofluorescence and Cadmium toxicity is established.
基金the Outstanding Youth Fund and the National Natural Science Founda-tion of China (Grant Nos. 50521302, 20574079 and 20423003)
文摘The isothermal and non-isothermal crystallization kinetics of LCBPP and linear-iPP was investigated by optical microscopy and differential scanning calorimetry (DSC). The optical microscopy results in the isothermal crystallization process show that the crystals of LCBPP grow slower than the crystals of the linear-iPP. This originates from the low chain mobility, or in other words, the lower chain diffusion rate of LCBPP due to the existence of long side chains. The DSC results in the isothermal crystallization process show that the LCBPP exhibits, however, a higher overall crystallization rate with respect to the linear-iPP. This is related to the higher nucleation ability of LCBPP since the isothermal crystallization process of both LCBPP and linear-iPP are nucleation-dominated. Avrami analysis indicates that the nucleation nature and crystal growth manner of LCBPP and linear-iPP are about the same. The analy- ses of the non-isothermal crystallization processes indicate an increment in crystallization rate with increasing cooling rate. But at any cooling rate, the linear-iPP crystallizes more quickly than the LCBPP. This implies that the non-isothermal crystallization processes of LCBPP and linear-iPP are diffu- sion-dominated, in which the lower chain diffusion rate of LCBPP results in the slower crystallization of it.
文摘A sample containing different regions with poly(ε-caprolactone)(PCL), oriented polyethylene (PE), and oriented isotactic polypropylene (iPP) films in contact with glass slide has been prepared to be observed in the same view field in an optical microscope and the crystallization of PCL in different regions during cooling from 80 °C down to room temperature at a rate of 1 °C·min^-1 was studied. The results showed that the crystallization of PCL started first at the PE surface and then at the iPP surface, while its bulk crystallization occured much later. This indicates that though both PE and iPP are active in nucleating PCL, the nucleation ability of PE is stronger than that of iPP. This was due to a better lattice matching between PCL and PE than that between PCL and iPP. Moreover, since lattice matching existed between every (hk0) lattice planes of both PCL and PE but only between the (100)PCL and (010)iPP lattice planes, the uniaxial orientation feature of the used PE and iPP films resulted in the existence of much more active nucleation sites of PCL on PE than on iPP. This led to the fact that the nucleation density of PCL at PE surface was so high that the crystallization of PCL at PE surface took place in a way like the film developing process with PCL microcrystallites happened everywhere with crystallization proceeding simultaneously. On the other hand, even though iPP also enhanced the nucleation density of PCL evidently, the crystallization of PCL at iPP surface included still a nucleation and crystal growth processes similar to that of its bulk crystallization.
基金supported by the National Natural Science Foundation of China(12072325)Key Scientific and Technological Project of Henan Province(202102210043)the Student Research Training Plan of Henan University of Science and Technology(2022191)。
文摘Nowadays,the newly interactive metaverse platform,which provides an immersive experience via the virtual reality(VR)technology that integrates the virtual world with the real world,shows huge potential applications in all facets of life.