A novel material, aminopropyl-functionalized manganese-loaded SBA-15（NH2-Mn-SBA-15）, was synthesized by bonding 3-aminopropyl trimethoxysilane（APTMS） onto manganeseloaded SBA-15（Mn-SBA-15） and used as a Cu2＋ads...A novel material, aminopropyl-functionalized manganese-loaded SBA-15（NH2-Mn-SBA-15）, was synthesized by bonding 3-aminopropyl trimethoxysilane（APTMS） onto manganeseloaded SBA-15（Mn-SBA-15） and used as a Cu2＋adsorbent in aqueous solution. Fourier transform infrared spectroscopy（FT-IR）, X-ray diffraction spectra（XRD）, N2adsorption/desorption isotherms, high resolution field emission scanning electron microscopy（FESEM）and X-ray photoelectron spectroscopy（XPS） were used to characterize the NH2-Mn-SBA-15.The ordered mesoporous structure of SBA-15 was remained after modification. The manganese oxides were mainly loaded on the internal surface of the pore channels while the aminopropyl groups were mainly anchored on the external surface of SBA-15. The adsorption of Cu2＋on NH2-Mn-SBA-15 was fitted well by the Langmuir equation and the maximum adsorption capacity of NH2-Mn-SBA-15 for Cu2＋was over two times higher than that of Mn-SBA-15 under the same conditions. The Elovich equation gave a good fit for the adsorption process of Cu2＋by NH2-Mn-SBA-15 and Mn-SBA-15. Both the loaded manganese oxides and the anchored aminopropyl groups were found to contribute to the uptake of Cu2＋. The NH2-Mn-SBA-15 showed high selectivity for copper ions. Consecutive adsorption–desorption experiments showed that the NH2-Mn-SBA-15 could be regenerated by acid treatment without altering its properties.展开更多
The title complex [Cu（ampym）（bapa）Cl]（ClO4） （C10H22Cl2CuN6O4） was synthesized and characterized by elemental analysis, IR and X-ray single-crystal diffraction. The crystal crystallizes in the orthorhombic syst...The title complex [Cu（ampym）（bapa）Cl]（ClO4） （C10H22Cl2CuN6O4） was synthesized and characterized by elemental analysis, IR and X-ray single-crystal diffraction. The crystal crystallizes in the orthorhombic system, space group Pna21 with a = 11.9904（12）, b = 15.9796（16）, c = 8.9 i 43（9） A^°, V = 1708.0（3）A^°3 Mr = 424.78, Z = 4, F（000） = 876, Dc = 1.652 g/cm^3, T = 293 K,μ =1 .619 mm^-1 and λ=0.71073 A^°. The structure was refined to R = 0.0240 and wR ： 0.0564 for 2905 observed reflections with I 〉 2σ（I）. Flack = 0.039（12）.展开更多
The title compound [Cu（C11H29N5）]（ClO4）2 was synthesized and characterized by elemental analysis, IR and X-ray single-crystal diffraction. The compound crystallizes in the monoclinic system, space group P21/n with...The title compound [Cu（C11H29N5）]（ClO4）2 was synthesized and characterized by elemental analysis, IR and X-ray single-crystal diffraction. The compound crystallizes in the monoclinic system, space group P21/n with α = 9.405（2）, b = 14.495（3）, c = 14.715（3） A, β= 90.262（3）°, V=2006.1（7） A^3,M,=493.83,Z=4,F）（000）= 1028,Dc= 1.635 g/cm^3, T= 298（2） K,μ= 1.403 mm^-1 and = 0.71073 A. The was refined to R = 0.0508 and wR = 0. 1250 for 2293 observed reflections with I 〉 2σ（I）. The Cu（Ⅱ） atom possesses a five-coordtinate CuN5 environment which shows a slightly distorted square-pyramidal geonetry. Antimicrobial activity study found that the complex is active against Salmonella species, Staphylococcus aureu, Bacillus pumilus and Bacillus coliforms.展开更多
The heterobinuclear complex of formula Cu (oxap )Gd(phen)2 (CIO4 )3 has been synthesized, where oxap denotes the N, N'-bis (2-aminopropyl )oxamido dianion and phen represents 1,10-phenanthroline. The complex was c...The heterobinuclear complex of formula Cu (oxap )Gd(phen)2 (CIO4 )3 has been synthesized, where oxap denotes the N, N'-bis (2-aminopropyl )oxamido dianion and phen represents 1,10-phenanthroline. The complex was characterized with ESR and variable temperature magnetic susceptibility (4- 300K). The least-squares fit of the experimental sosceptibilities yielded J=2. 25cm-1. The observed Gd (Ⅲ)-Cu (Ⅱ) coupling is ferromagnetic.One Plausible mechanism that can cause a ferromagnetic coupling between Gd(Ⅱ) and Cu (Ⅱ) is discussed in terms of spin-polarization.展开更多
An efficient, environmentally friendly procedure is developed for the condensation of aldchydcs/kctoncs and activated methylene compounds by using an aminopropyl-functionalized MCM-41 catalyst in aqueous solution. Dif...An efficient, environmentally friendly procedure is developed for the condensation of aldchydcs/kctoncs and activated methylene compounds by using an aminopropyl-functionalized MCM-41 catalyst in aqueous solution. Different aldchydcs/kctoncs and activated methylene compounds gave the corresponding alkcncs in 78-97% isolated yields in mild reaction conditions. In comparison with organic solution, the aqueous solution gives higher yields in the same reaction conditions. Further more, the aminopropyl-functionalizcd MCM-41 in aqueous system can be reused for 8 flints without significant decrease of activity.展开更多
Six novel μ-oxamido trinuclear complexes, namely Cu_2(oxap)_2Ln(ClO_4)_3 (Ln: La, Pr, Nd, Gd, Yb, Ho), where oxap is N,N'-bis(2-aminopropyl)oxamido, have been synthesized. The complex Cu_2(oxap)_2Gd(ClO_4)_3 was ...Six novel μ-oxamido trinuclear complexes, namely Cu_2(oxap)_2Ln(ClO_4)_3 (Ln: La, Pr, Nd, Gd, Yb, Ho), where oxap is N,N'-bis(2-aminopropyl)oxamido, have been synthesized. The complex Cu_2(oxap)_2Gd(ClO_4)_3 was characterized with variable temperature magnetic susceptibility (4-300 K). The exchange integrals J (Cu-Gd) and J'(Cu-Cu) were found to be 0.83 cm^(-1) and -1.62 cm^(-1), indi- cating that very weakly ferromagnetic spin-exchange interaction operates between Cu(II) and Gd (III) ions.展开更多
基金supported by the Fundamental Research Funds for the Central Universities (No. TD2010-5)the National Natural Science Research Fund (No. 51278051)the Beijing Forestry University Young Scientist Fund (No. BLX2009018)
文摘A novel material, aminopropyl-functionalized manganese-loaded SBA-15（NH2-Mn-SBA-15）, was synthesized by bonding 3-aminopropyl trimethoxysilane（APTMS） onto manganeseloaded SBA-15（Mn-SBA-15） and used as a Cu2＋adsorbent in aqueous solution. Fourier transform infrared spectroscopy（FT-IR）, X-ray diffraction spectra（XRD）, N2adsorption/desorption isotherms, high resolution field emission scanning electron microscopy（FESEM）and X-ray photoelectron spectroscopy（XPS） were used to characterize the NH2-Mn-SBA-15.The ordered mesoporous structure of SBA-15 was remained after modification. The manganese oxides were mainly loaded on the internal surface of the pore channels while the aminopropyl groups were mainly anchored on the external surface of SBA-15. The adsorption of Cu2＋on NH2-Mn-SBA-15 was fitted well by the Langmuir equation and the maximum adsorption capacity of NH2-Mn-SBA-15 for Cu2＋was over two times higher than that of Mn-SBA-15 under the same conditions. The Elovich equation gave a good fit for the adsorption process of Cu2＋by NH2-Mn-SBA-15 and Mn-SBA-15. Both the loaded manganese oxides and the anchored aminopropyl groups were found to contribute to the uptake of Cu2＋. The NH2-Mn-SBA-15 showed high selectivity for copper ions. Consecutive adsorption–desorption experiments showed that the NH2-Mn-SBA-15 could be regenerated by acid treatment without altering its properties.
基金This project was supported by the Foundation of Science Committee of Jiangsu province (BK2005045)
文摘The title complex [Cu（ampym）（bapa）Cl]（ClO4） （C10H22Cl2CuN6O4） was synthesized and characterized by elemental analysis, IR and X-ray single-crystal diffraction. The crystal crystallizes in the orthorhombic system, space group Pna21 with a = 11.9904（12）, b = 15.9796（16）, c = 8.9 i 43（9） A^°, V = 1708.0（3）A^°3 Mr = 424.78, Z = 4, F（000） = 876, Dc = 1.652 g/cm^3, T = 293 K,μ =1 .619 mm^-1 and λ=0.71073 A^°. The structure was refined to R = 0.0240 and wR ： 0.0564 for 2905 observed reflections with I 〉 2σ（I）. Flack = 0.039（12）.
基金The project was supported by the Natural Science Foundation of Jiangsu Province (No. BK2005045) and Key Marine Biotechnology Lab. of HHIT
文摘The title compound [Cu（C11H29N5）]（ClO4）2 was synthesized and characterized by elemental analysis, IR and X-ray single-crystal diffraction. The compound crystallizes in the monoclinic system, space group P21/n with α = 9.405（2）, b = 14.495（3）, c = 14.715（3） A, β= 90.262（3）°, V=2006.1（7） A^3,M,=493.83,Z=4,F）（000）= 1028,Dc= 1.635 g/cm^3, T= 298（2） K,μ= 1.403 mm^-1 and = 0.71073 A. The was refined to R = 0.0508 and wR = 0. 1250 for 2293 observed reflections with I 〉 2σ（I）. The Cu（Ⅱ） atom possesses a five-coordtinate CuN5 environment which shows a slightly distorted square-pyramidal geonetry. Antimicrobial activity study found that the complex is active against Salmonella species, Staphylococcus aureu, Bacillus pumilus and Bacillus coliforms.
文摘The heterobinuclear complex of formula Cu (oxap )Gd(phen)2 (CIO4 )3 has been synthesized, where oxap denotes the N, N'-bis (2-aminopropyl )oxamido dianion and phen represents 1,10-phenanthroline. The complex was characterized with ESR and variable temperature magnetic susceptibility (4- 300K). The least-squares fit of the experimental sosceptibilities yielded J=2. 25cm-1. The observed Gd (Ⅲ)-Cu (Ⅱ) coupling is ferromagnetic.One Plausible mechanism that can cause a ferromagnetic coupling between Gd(Ⅱ) and Cu (Ⅱ) is discussed in terms of spin-polarization.
文摘An efficient, environmentally friendly procedure is developed for the condensation of aldchydcs/kctoncs and activated methylene compounds by using an aminopropyl-functionalized MCM-41 catalyst in aqueous solution. Different aldchydcs/kctoncs and activated methylene compounds gave the corresponding alkcncs in 78-97% isolated yields in mild reaction conditions. In comparison with organic solution, the aqueous solution gives higher yields in the same reaction conditions. Further more, the aminopropyl-functionalizcd MCM-41 in aqueous system can be reused for 8 flints without significant decrease of activity.
基金Project supported by the National Natural Science Foundation or China.
文摘Six novel μ-oxamido trinuclear complexes, namely Cu_2(oxap)_2Ln(ClO_4)_3 (Ln: La, Pr, Nd, Gd, Yb, Ho), where oxap is N,N'-bis(2-aminopropyl)oxamido, have been synthesized. The complex Cu_2(oxap)_2Gd(ClO_4)_3 was characterized with variable temperature magnetic susceptibility (4-300 K). The exchange integrals J (Cu-Gd) and J'(Cu-Cu) were found to be 0.83 cm^(-1) and -1.62 cm^(-1), indi- cating that very weakly ferromagnetic spin-exchange interaction operates between Cu(II) and Gd (III) ions.
