A novel chain complex was synthesized and its crystal structure has been deter- mined by X-ray diffraction technique. It was found that the local coordination geometry around Cu(Ⅱ) is a distorted tetrahedron and C14H...A novel chain complex was synthesized and its crystal structure has been deter- mined by X-ray diffraction technique. It was found that the local coordination geometry around Cu(Ⅱ) is a distorted tetrahedron and C14H9CuNO3CH3OH is bridged by the carboxylate oxygen atom to form an infinite one-dimensional linear chain. The hydrogen bond exists between O(1) and solvate molecule O(4). The crystal belongs to monoclinic, space group P21 with a = 9.6650(19), b = 7.1280(14), c = 9.925(2) ? b = 98.39(3)? V = 676.4(2) 3, Z = 2, F(000) = 342 and m(MoK? = 1.629 mm-1 .展开更多
The new uranyl complex UO2(NO3)2[PhN(CH3)C(O)(CH3)NPh]2 was synthesized and its crystal structure has been determined by single-crystal X-ray diffraction. Crystal data: C30H32N6O10U, triclinic, space group P with a = ...The new uranyl complex UO2(NO3)2[PhN(CH3)C(O)(CH3)NPh]2 was synthesized and its crystal structure has been determined by single-crystal X-ray diffraction. Crystal data: C30H32N6O10U, triclinic, space group P with a = 7.772(1), b = 9.267(1), c = 12.644(1) ? a = 68.246(8), b = 73.871(9), g = 84.99(1)o, V = 812.4(2) ?, Mr = 874.65, Z = 1, Dc = 1.788 g/cm3, F(000) = 426, m = 5.062 mm-1, the final R = 0.022 and wR = 0.059 for 3571 observed reflections (I > 2s(I)). The central uranyl ion is coordinated by six oxygen atoms, two from the carbonyl groups of N,N-dimethyl-N,N-dibenzenyl-urea molecules and the other four from two nitrate groups.展开更多
Three new complexes, [Zn(dtb)(4,4'-bipy)]·5H2O (1), [Zn(dtb)(bpp)]·H2O (2) and [Zn(dtb)(phen)2]·CH3CH2OH·H2O (3) (dtb = 5,5'-dithiobis(2-nitrobenzoic acid), 4,4'-bipy = 4,4'-bipyrid...Three new complexes, [Zn(dtb)(4,4'-bipy)]·5H2O (1), [Zn(dtb)(bpp)]·H2O (2) and [Zn(dtb)(phen)2]·CH3CH2OH·H2O (3) (dtb = 5,5'-dithiobis(2-nitrobenzoic acid), 4,4'-bipy = 4,4'-bipyridine, bpp = 1,3-bi(4-pyridyl) propane, phen = 1,10-phenanthroline), have been constructed by dtb ligand and zinc salt in the presence of different assistant N-containing ligands under hydrothermal conditions. The structures of the complexes were established by single-crystal X-ray diffraction analysis. Although compounds 1 and 2 are both 2D networks, the cavities’ forms and pitch of helix are different. The structure of compound 3 shows a 1D helical chain, and is extended by the supermolecule interactions into a 2D framework. These neutral polymeric complexes exhibit structural and dimensional diversity due to the different coordination modes of the flexible dtb ligand and the effect of assistant ligands.展开更多
We report the discovery and characterization of a novel 112-type iron pnictide EuFeAs2, with La-doping induced superconductivity in a series of Eu1- xLaxFeAs2. The polycrystalline samples were synthesized through soli...We report the discovery and characterization of a novel 112-type iron pnictide EuFeAs2, with La-doping induced superconductivity in a series of Eu1- xLaxFeAs2. The polycrystalline samples were synthesized through solid state reaction method only within a very narrow temperature window around 1073 K. Small single crystals were also grown from a flux method with the size about 100μm. The crystal structure was identified by single crystal X-ray diffraction analysis as a monoclinic structure with space group of P2 1/m. From resistivity and magnetic susceptibility measurements, we found that the parent compound EuFeAs2 shows distinct anomalies probably due to the Fe2＋ related antiferromagnetic/structural phase transition near 110K and the Eu2＋ related antiferromagnetic phase transition near 40K. La-doping suppressed both phase transitions to lower temperatures and induced superconducting transitions with a Tc - 11 K for Eu0.85La0.15FeAs2.展开更多
Yttrium complexes stabilized by a diaminobis(phenolate) ligand were synthesized and their catalytic behavior was explored. Reaction of YCl3 with 1 equiv of LNa2 [L= Me2NCH2CH2N{CH2-(2-O-C6H2-tBu2-3, 5)}2] gave the ytt...Yttrium complexes stabilized by a diaminobis(phenolate) ligand were synthesized and their catalytic behavior was explored. Reaction of YCl3 with 1 equiv of LNa2 [L= Me2NCH2CH2N{CH2-(2-O-C6H2-tBu2-3, 5)}2] gave the yttrium chloride LYCl(THF) (1) in 92% yield. Complex 1 can be used as starting material to prepare the yttrium amido derivative. Complex 1 reacted with 1 equiv of LiNPh2 in THF to afford the expected yttrium amido complex LYNPh2 (2) in high yield. Both of complexes 1 and 2 have been well detected by elemental analysis, NMR spectra and single-crystal X-ray analysis. It was found that complex 2 can efficiently initiate the ring-opening polymerization of L-lactide and ε-caprolactone, and a controlled manner is observed in the former case.展开更多
Herein we report two highly porous Zr-based metal-organic frameworks （MOFs, 1 and 2） constructed by the truncated octahedral secondary building unit （SBU） of Zr604（OH）4（CO2）12 and the organic linear ligand of ...Herein we report two highly porous Zr-based metal-organic frameworks （MOFs, 1 and 2） constructed by the truncated octahedral secondary building unit （SBU） of Zr604（OH）4（CO2）12 and the organic linear ligand of 4,4＇-stilbenedicarboxylic acid （H2sbdc） or 4,4＇-azobenezenedicarboxylic acid （H2abdc）. Both Zr-based MOFs are obtained as single crystals of suitable size for single-crystal X-ray diffraction analysis. Furthermore, these two Zr-based MOFs have been fully characterized by powder X-ray diffraction （PXRD） studies, thermogravimetric analysis （TGA）, infrared spectroscopy （IR） and gas adsorption analysis. In particular, their CO2 gas adsorption behaviors have been investigated and discussed.展开更多
Three bis-vinylpyridine compounds (4,4′-bis(2-vinylpyridine)biphenyl L1,4,4′-bis(3-vinylpyridine) biphenyl L2,and 4,4′-bis (4-vinylpyridine)biphenyl L3) were synthesized by one-step solid-state reactions at room te...Three bis-vinylpyridine compounds (4,4′-bis(2-vinylpyridine)biphenyl L1,4,4′-bis(3-vinylpyridine) biphenyl L2,and 4,4′-bis (4-vinylpyridine)biphenyl L3) were synthesized by one-step solid-state reactions at room temperature,giving nearly quantitative yields. The compounds obtained were fully characterized by IR,MS and NMR spectroscopies. The structures of L2 and L3 were determined by single crystal X-ray diffraction analysis. No noticeable solvatochromism was observed in either one-photon absorption or one-photon excited fluorescence spectra. All of the compounds have high fluorescence quantum yields and long fluorescence lifetime. The linear and nonlinear optical properties of the compounds were investigated both experimentally and theoretically. Interestingly,the position of the nitrogen atom from pyridine influences their two-photon absorption across-sections.展开更多
Two phase transition compounds,diethylammonium 1,5-naphthalenedisulfonate(1)and cyclohexylammonium 1,5-naphthalenedisulfonate(2),were screened from a series of organic salts based on 1,5-naphthalenedisulfonate.The pha...Two phase transition compounds,diethylammonium 1,5-naphthalenedisulfonate(1)and cyclohexylammonium 1,5-naphthalenedisulfonate(2),were screened from a series of organic salts based on 1,5-naphthalenedisulfonate.The phase transition behaviors were studied by differential scanning calorimetry,single-crystal X-ray analysis and dielectric measurements.Compounds 1 and 2 undergo phase transitions at about 202 and 148 K,respectively,accompanied by distinct dielectric changes.The origin of the phase transitions was ascribed to motional changes of the cations in the crystal lattices.展开更多
文摘A novel chain complex was synthesized and its crystal structure has been deter- mined by X-ray diffraction technique. It was found that the local coordination geometry around Cu(Ⅱ) is a distorted tetrahedron and C14H9CuNO3CH3OH is bridged by the carboxylate oxygen atom to form an infinite one-dimensional linear chain. The hydrogen bond exists between O(1) and solvate molecule O(4). The crystal belongs to monoclinic, space group P21 with a = 9.6650(19), b = 7.1280(14), c = 9.925(2) ? b = 98.39(3)? V = 676.4(2) 3, Z = 2, F(000) = 342 and m(MoK? = 1.629 mm-1 .
基金This work was supported by the Funds of the Key Laboratory of Organic Syntheses of Jiangsu province (No. KJS01018) and the Funds of Young Teachers of Suzhou University
文摘The new uranyl complex UO2(NO3)2[PhN(CH3)C(O)(CH3)NPh]2 was synthesized and its crystal structure has been determined by single-crystal X-ray diffraction. Crystal data: C30H32N6O10U, triclinic, space group P with a = 7.772(1), b = 9.267(1), c = 12.644(1) ? a = 68.246(8), b = 73.871(9), g = 84.99(1)o, V = 812.4(2) ?, Mr = 874.65, Z = 1, Dc = 1.788 g/cm3, F(000) = 426, m = 5.062 mm-1, the final R = 0.022 and wR = 0.059 for 3571 observed reflections (I > 2s(I)). The central uranyl ion is coordinated by six oxygen atoms, two from the carbonyl groups of N,N-dimethyl-N,N-dibenzenyl-urea molecules and the other four from two nitrate groups.
基金Supported by the National Natural Science Foundation of China (Grant No. 20771090)Teaching and Research Award Program for Outstanding Young Teachers in Higher Education InstitutesSpecialized Research Fund for the Doctoral Program of Higher Education (Grant No. 20050697005)
文摘Three new complexes, [Zn(dtb)(4,4'-bipy)]·5H2O (1), [Zn(dtb)(bpp)]·H2O (2) and [Zn(dtb)(phen)2]·CH3CH2OH·H2O (3) (dtb = 5,5'-dithiobis(2-nitrobenzoic acid), 4,4'-bipy = 4,4'-bipyridine, bpp = 1,3-bi(4-pyridyl) propane, phen = 1,10-phenanthroline), have been constructed by dtb ligand and zinc salt in the presence of different assistant N-containing ligands under hydrothermal conditions. The structures of the complexes were established by single-crystal X-ray diffraction analysis. Although compounds 1 and 2 are both 2D networks, the cavities’ forms and pitch of helix are different. The structure of compound 3 shows a 1D helical chain, and is extended by the supermolecule interactions into a 2D framework. These neutral polymeric complexes exhibit structural and dimensional diversity due to the different coordination modes of the flexible dtb ligand and the effect of assistant ligands.
基金the financial supports from the National Natural Science Foundation of China (11474339)the National Basic Research Program of China (973 Program, 2016YFA0300301, 2010CB923000 and 2011CBA00100)the Youth Innovation Promotion Association of the Chinese Academy of Sciences
文摘We report the discovery and characterization of a novel 112-type iron pnictide EuFeAs2, with La-doping induced superconductivity in a series of Eu1- xLaxFeAs2. The polycrystalline samples were synthesized through solid state reaction method only within a very narrow temperature window around 1073 K. Small single crystals were also grown from a flux method with the size about 100μm. The crystal structure was identified by single crystal X-ray diffraction analysis as a monoclinic structure with space group of P2 1/m. From resistivity and magnetic susceptibility measurements, we found that the parent compound EuFeAs2 shows distinct anomalies probably due to the Fe2＋ related antiferromagnetic/structural phase transition near 110K and the Eu2＋ related antiferromagnetic phase transition near 40K. La-doping suppressed both phase transitions to lower temperatures and induced superconducting transitions with a Tc - 11 K for Eu0.85La0.15FeAs2.
基金Supported by the National Natural Science Foundation of China (Grant No. 20771078)Natural Science Foundation of Jiangsu Province (Grant No. BK2007505)Major Basic Research Project of Natural Science Foundation of Jiangsu Higher Education Institutions (Grant No. 07KJA15014)
文摘Yttrium complexes stabilized by a diaminobis(phenolate) ligand were synthesized and their catalytic behavior was explored. Reaction of YCl3 with 1 equiv of LNa2 [L= Me2NCH2CH2N{CH2-(2-O-C6H2-tBu2-3, 5)}2] gave the yttrium chloride LYCl(THF) (1) in 92% yield. Complex 1 can be used as starting material to prepare the yttrium amido derivative. Complex 1 reacted with 1 equiv of LiNPh2 in THF to afford the expected yttrium amido complex LYNPh2 (2) in high yield. Both of complexes 1 and 2 have been well detected by elemental analysis, NMR spectra and single-crystal X-ray analysis. It was found that complex 2 can efficiently initiate the ring-opening polymerization of L-lactide and ε-caprolactone, and a controlled manner is observed in the former case.
基金supported by the National Science Foundation (DMR-1352065)the University of South FloridaChemMatCARS Sector 15 is supported by the National Science Foundation (NSF/CHE-1346572)
文摘Herein we report two highly porous Zr-based metal-organic frameworks （MOFs, 1 and 2） constructed by the truncated octahedral secondary building unit （SBU） of Zr604（OH）4（CO2）12 and the organic linear ligand of 4,4＇-stilbenedicarboxylic acid （H2sbdc） or 4,4＇-azobenezenedicarboxylic acid （H2abdc）. Both Zr-based MOFs are obtained as single crystals of suitable size for single-crystal X-ray diffraction analysis. Furthermore, these two Zr-based MOFs have been fully characterized by powder X-ray diffraction （PXRD） studies, thermogravimetric analysis （TGA）, infrared spectroscopy （IR） and gas adsorption analysis. In particular, their CO2 gas adsorption behaviors have been investigated and discussed.
基金supported by a grant for the National Natural Science Foundation of China (20771001, 50703001, 50873001)Department of Education of Anhui Province (KJ2010A030)+1 种基金Team for Scientific Innovation Foundation of Anhui Province (2006KJ007TD)Key Laboratory of Opto-Electronic Information Acquisition and Manipulation (Anhui University)
文摘Three bis-vinylpyridine compounds (4,4′-bis(2-vinylpyridine)biphenyl L1,4,4′-bis(3-vinylpyridine) biphenyl L2,and 4,4′-bis (4-vinylpyridine)biphenyl L3) were synthesized by one-step solid-state reactions at room temperature,giving nearly quantitative yields. The compounds obtained were fully characterized by IR,MS and NMR spectroscopies. The structures of L2 and L3 were determined by single crystal X-ray diffraction analysis. No noticeable solvatochromism was observed in either one-photon absorption or one-photon excited fluorescence spectra. All of the compounds have high fluorescence quantum yields and long fluorescence lifetime. The linear and nonlinear optical properties of the compounds were investigated both experimentally and theoretically. Interestingly,the position of the nitrogen atom from pyridine influences their two-photon absorption across-sections.
基金the National Natural Science Foundation of China (21225102)
文摘Two phase transition compounds,diethylammonium 1,5-naphthalenedisulfonate(1)and cyclohexylammonium 1,5-naphthalenedisulfonate(2),were screened from a series of organic salts based on 1,5-naphthalenedisulfonate.The phase transition behaviors were studied by differential scanning calorimetry,single-crystal X-ray analysis and dielectric measurements.Compounds 1 and 2 undergo phase transitions at about 202 and 148 K,respectively,accompanied by distinct dielectric changes.The origin of the phase transitions was ascribed to motional changes of the cations in the crystal lattices.
