The self-assembled formation of a one-dimensional lanthanum salicylald imine coordination polymer was proved by the X-ray diffraction analysis of new l anthanum(Ⅲ) nitrate complex containing N,N’-bis(salicylidene)-1...The self-assembled formation of a one-dimensional lanthanum salicylald imine coordination polymer was proved by the X-ray diffraction analysis of new l anthanum(Ⅲ) nitrate complex containing N,N’-bis(salicylidene)-1,5-pentanediami ne ligand(H2L) . It was obtained in situ in a one-step,metal-templated condensa tion of salicylaldehyde with 1,5-pentanediamine(cadaverine,biogenic polyamine) and characterized by microanalysis and spectroscopic(IR,ESI-MS,UV-Vis,and 1 H NMR) data. The [La(NO3) 3(μ-H2L) 2]∞ complex displayed 10-coordinate distorted bicapped dodecahedron geometry with unusual coordination pattern of undeprotonat ed salicylaldimines which acted as μ-bridging ditopic ligands using exclusivel y the oxygens as donor atoms with the nitrogen atoms not being involved in the c oordination environment.展开更多
A series of N-（5-chloro-2-hydroxyphenyl）-（3/4/5-substituted）-salicylaldimines （I--XI） were synthesized using appropriate synthetic route. Their structures were characterized by FT-IR, UV-Visible, ESI-MS, 1H and ...A series of N-（5-chloro-2-hydroxyphenyl）-（3/4/5-substituted）-salicylaldimines （I--XI） were synthesized using appropriate synthetic route. Their structures were characterized by FT-IR, UV-Visible, ESI-MS, 1H and 13C NMR spectroscopic techniques and analytical methods. The crystal structure of N-（5-chloro-2-hydroxyphenyl）-5-bromo- salicylaldimine （V） was determined by X-ray diffraction at room temperature. Relationship between the melting points and the structures of the compounds was examined. Antimicrobial activity of the compounds was evaluated against Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Proteus mirabilis. Antifungal activities were reported for Candida albicans. Schiff bases showed considerable antimicrobial activity against S. aureus, S, epidermidis and C. albicans. N-（5-Chloro-2-hydroxyphenyl）-3-hydroxy-salieylaldimine （II） has the broadest and highest antimicrobial activity according to the others.展开更多
A series of salicylaldimine ligands were designed to promote the copper-catalyzed Ullmann cross- coupling reaction. After a screening process, 2-（（2-isopropylphenylimino）methyl）phenol was found to serve as a good ...A series of salicylaldimine ligands were designed to promote the copper-catalyzed Ullmann cross- coupling reaction. After a screening process, 2-（（2-isopropylphenylimino）methyl）phenol was found to serve as a good supporting ligand for this reaction. Employing this Schiff-base ligand as a new supporting ligand, the copper-catalyzed coupling reactions of aryl bromides and aryl iodides with various phenols successfully proceeded in good yields under mild conditions. Various diaryl ethers were obtained with excellent yields in dioxane in the presence of K3P04 and a catalytic amount of copper（I） salt.展开更多
The title nickel complex （C34H3oCl2N2NiO4, Mr = 660.21） has been synthesized and its crystal structure was determined by single-crystal X-ray structure analysis. It crystallizes in the monoclinic system, space group...The title nickel complex （C34H3oCl2N2NiO4, Mr = 660.21） has been synthesized and its crystal structure was determined by single-crystal X-ray structure analysis. It crystallizes in the monoclinic system, space group P21/n with a = 11.026（8）, b = 11.491（8）, c = 12.119（9） A°, β=91.328（13）°, Z= 2, V= 1535.0（19） ,A°^3, Dc = 1.428 g/cm^3, F（000） = 684 andμ（MoKa） = 0.848 mm^-1 The structure was refined to R = 0.0544 for 1813 observed reflections with I 〉 2σ（I） and wR =0.0867 for 3132 unique reflections. The molecule of the complex is high symmetrical. Ni（Ⅱ） atom is located in the symmetric center and coordinated to two phenolic oxygen and two imino nitrogen atoms, forming two six-membered rings. Upon activation with methylaluminoxane （MAO）, it is active for ethylene oligomerization.展开更多
Polyolefins,as one of the most productive synthetic polymer materials,have been widely used in industry and daily life[1-2].However,due to their"non-polar"nature,polyolefins have poor compatibility and adhes...Polyolefins,as one of the most productive synthetic polymer materials,have been widely used in industry and daily life[1-2].However,due to their"non-polar"nature,polyolefins have poor compatibility and adhesion to polar materials,limiting their application in many fields[3-5].展开更多
基金Project supported by the Polish Ministry of Science and Higher Education (NN204 0317 33)
文摘The self-assembled formation of a one-dimensional lanthanum salicylald imine coordination polymer was proved by the X-ray diffraction analysis of new l anthanum(Ⅲ) nitrate complex containing N,N’-bis(salicylidene)-1,5-pentanediami ne ligand(H2L) . It was obtained in situ in a one-step,metal-templated condensa tion of salicylaldehyde with 1,5-pentanediamine(cadaverine,biogenic polyamine) and characterized by microanalysis and spectroscopic(IR,ESI-MS,UV-Vis,and 1 H NMR) data. The [La(NO3) 3(μ-H2L) 2]∞ complex displayed 10-coordinate distorted bicapped dodecahedron geometry with unusual coordination pattern of undeprotonat ed salicylaldimines which acted as μ-bridging ditopic ligands using exclusivel y the oxygens as donor atoms with the nitrogen atoms not being involved in the c oordination environment.
文摘A series of N-（5-chloro-2-hydroxyphenyl）-（3/4/5-substituted）-salicylaldimines （I--XI） were synthesized using appropriate synthetic route. Their structures were characterized by FT-IR, UV-Visible, ESI-MS, 1H and 13C NMR spectroscopic techniques and analytical methods. The crystal structure of N-（5-chloro-2-hydroxyphenyl）-5-bromo- salicylaldimine （V） was determined by X-ray diffraction at room temperature. Relationship between the melting points and the structures of the compounds was examined. Antimicrobial activity of the compounds was evaluated against Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Proteus mirabilis. Antifungal activities were reported for Candida albicans. Schiff bases showed considerable antimicrobial activity against S. aureus, S, epidermidis and C. albicans. N-（5-Chloro-2-hydroxyphenyl）-3-hydroxy-salieylaldimine （II） has the broadest and highest antimicrobial activity according to the others.
基金the National Natural Science Foundation of ChinaKey Laboratory of Organic Synthesis of Jiangsu Province for the financial support(Nos.21201147,21302063,KJS1112)
文摘A series of salicylaldimine ligands were designed to promote the copper-catalyzed Ullmann cross- coupling reaction. After a screening process, 2-（（2-isopropylphenylimino）methyl）phenol was found to serve as a good supporting ligand for this reaction. Employing this Schiff-base ligand as a new supporting ligand, the copper-catalyzed coupling reactions of aryl bromides and aryl iodides with various phenols successfully proceeded in good yields under mild conditions. Various diaryl ethers were obtained with excellent yields in dioxane in the presence of K3P04 and a catalytic amount of copper（I） salt.
基金This work was supported by the National Natural Science Foundation of China (No. 20272062 and 20473099) and National 863 Project (2002AA333060)
文摘The title nickel complex （C34H3oCl2N2NiO4, Mr = 660.21） has been synthesized and its crystal structure was determined by single-crystal X-ray structure analysis. It crystallizes in the monoclinic system, space group P21/n with a = 11.026（8）, b = 11.491（8）, c = 12.119（9） A°, β=91.328（13）°, Z= 2, V= 1535.0（19） ,A°^3, Dc = 1.428 g/cm^3, F（000） = 684 andμ（MoKa） = 0.848 mm^-1 The structure was refined to R = 0.0544 for 1813 observed reflections with I 〉 2σ（I） and wR =0.0867 for 3132 unique reflections. The molecule of the complex is high symmetrical. Ni（Ⅱ） atom is located in the symmetric center and coordinated to two phenolic oxygen and two imino nitrogen atoms, forming two six-membered rings. Upon activation with methylaluminoxane （MAO）, it is active for ethylene oligomerization.
基金This work was supported by the National Natural Science Foundation of China(No.22001004)。
文摘Polyolefins,as one of the most productive synthetic polymer materials,have been widely used in industry and daily life[1-2].However,due to their"non-polar"nature,polyolefins have poor compatibility and adhesion to polar materials,limiting their application in many fields[3-5].
