A tridentate Schiff base ligand, (E)-2-(4-dimethylbenzydimino) glycylglycine (glygly-DAB), derived from the condensation of 4-Dimethylaminobenzaldehyde (DAB) and glycylglycine (glygly) together with its Co(II), Ni(II)...A tridentate Schiff base ligand, (E)-2-(4-dimethylbenzydimino) glycylglycine (glygly-DAB), derived from the condensation of 4-Dimethylaminobenzaldehyde (DAB) and glycylglycine (glygly) together with its Co(II), Ni(II), Cu(II) and Zn(II) complexes have been synthesized and characterized using various physico-chemical methods including C,H,N elemental analysis, melting point determination, molar conductivity measurement, IR, 1H NMR and UV-Vis. The ligand and metal complexes were screened in vitro for antimicrobial and antifungal activities on four bacterial strains (Staphylococcus aureus, Escherichia coli, Salmonella thyphi and Pseudomonas aeruginosa) and two fungal strains (Candida albicans and Cryptococcus neoformans). glygly-DAB showed remarkable antifungal activities on all the fungal strains and antibacterial activities on one bacterial strain.展开更多
A coordination complex was synthesized from NiCl2 and dipeptide glycylglycine（GG）. It was characterized by element analysis, NMR and TG methods, and then was determined to be Ni（C4HsN2O3）2Cl2. Using an isoperiboli...A coordination complex was synthesized from NiCl2 and dipeptide glycylglycine（GG）. It was characterized by element analysis, NMR and TG methods, and then was determined to be Ni（C4HsN2O3）2Cl2. Using an isoperibolic reaction calorimeter, the standard molar enthalpy of formation of Ni（GG）2Cl2（solid） has been determined to be -（1 674.66±2.02） kJ · mol^-1 at 298.15 K.展开更多
利用Anton Paar DMA55精密数字密度计测定了288.15,298.15和308.15K甘氨酰甘氨酸在蔗糖-水混合溶剂中的密度,计算了甘氨酰甘氨酸的表观摩尔体积VΦ和极限偏摩尔体积VΦο,得到了其由纯水溶剂转移至混合溶剂中的迁移偏摩尔体积ΔtrsVΦ...利用Anton Paar DMA55精密数字密度计测定了288.15,298.15和308.15K甘氨酰甘氨酸在蔗糖-水混合溶剂中的密度,计算了甘氨酰甘氨酸的表观摩尔体积VΦ和极限偏摩尔体积VΦο,得到了其由纯水溶剂转移至混合溶剂中的迁移偏摩尔体积ΔtrsVΦο和理论水化数Nh.根据共球交盖模型,讨论了迁移偏摩尔体积和水化数的变化规律.结果表明,甘氨酰甘氨酸带电中心与蔗糖之间的结构相互作用对其迁移体积有正贡献,且占主导地位.甘氨酰甘氨酸的迁移偏摩尔体积为正值,且随着蔗糖浓度的增大而增大;理论水化数随温度升高、蔗糖浓度的增大而减小;温度升高,极限偏摩尔体积增大,迁移偏摩尔体积变化很小.展开更多
探讨了N-甘氨酰甘氨酸-MCI-GEL体系固相萃取分离钯的行为。结果表明,MCI-GEL树脂能够吸附钯与N-甘氨酰甘氨酸(Gl C)形成的配合物。探究出了实验的最佳萃取条件:n(Gl C)∶n(Pd(Ⅱ))=1∶1,c(HCl)=0.05 mol/L,V过柱=1 m L/min,钯的萃取率可...探讨了N-甘氨酰甘氨酸-MCI-GEL体系固相萃取分离钯的行为。结果表明,MCI-GEL树脂能够吸附钯与N-甘氨酰甘氨酸(Gl C)形成的配合物。探究出了实验的最佳萃取条件:n(Gl C)∶n(Pd(Ⅱ))=1∶1,c(HCl)=0.05 mol/L,V过柱=1 m L/min,钯的萃取率可达99%。实验测定了小柱的萃取容量为4.8 mg/g,以丙酮为洗脱溶剂,2 m L丙酮以1 m L/min的洗脱速度能完全洗脱钯的配合物。对合成试样中的钯进行了分离和测定,效果良好。展开更多
文摘A tridentate Schiff base ligand, (E)-2-(4-dimethylbenzydimino) glycylglycine (glygly-DAB), derived from the condensation of 4-Dimethylaminobenzaldehyde (DAB) and glycylglycine (glygly) together with its Co(II), Ni(II), Cu(II) and Zn(II) complexes have been synthesized and characterized using various physico-chemical methods including C,H,N elemental analysis, melting point determination, molar conductivity measurement, IR, 1H NMR and UV-Vis. The ligand and metal complexes were screened in vitro for antimicrobial and antifungal activities on four bacterial strains (Staphylococcus aureus, Escherichia coli, Salmonella thyphi and Pseudomonas aeruginosa) and two fungal strains (Candida albicans and Cryptococcus neoformans). glygly-DAB showed remarkable antifungal activities on all the fungal strains and antibacterial activities on one bacterial strain.
基金Supported by the National Natural Science Foundation of China (20373050).
文摘A coordination complex was synthesized from NiCl2 and dipeptide glycylglycine（GG）. It was characterized by element analysis, NMR and TG methods, and then was determined to be Ni（C4HsN2O3）2Cl2. Using an isoperibolic reaction calorimeter, the standard molar enthalpy of formation of Ni（GG）2Cl2（solid） has been determined to be -（1 674.66±2.02） kJ · mol^-1 at 298.15 K.
文摘利用Anton Paar DMA55精密数字密度计测定了288.15,298.15和308.15K甘氨酰甘氨酸在蔗糖-水混合溶剂中的密度,计算了甘氨酰甘氨酸的表观摩尔体积VΦ和极限偏摩尔体积VΦο,得到了其由纯水溶剂转移至混合溶剂中的迁移偏摩尔体积ΔtrsVΦο和理论水化数Nh.根据共球交盖模型,讨论了迁移偏摩尔体积和水化数的变化规律.结果表明,甘氨酰甘氨酸带电中心与蔗糖之间的结构相互作用对其迁移体积有正贡献,且占主导地位.甘氨酰甘氨酸的迁移偏摩尔体积为正值,且随着蔗糖浓度的增大而增大;理论水化数随温度升高、蔗糖浓度的增大而减小;温度升高,极限偏摩尔体积增大,迁移偏摩尔体积变化很小.
文摘探讨了N-甘氨酰甘氨酸-MCI-GEL体系固相萃取分离钯的行为。结果表明,MCI-GEL树脂能够吸附钯与N-甘氨酰甘氨酸(Gl C)形成的配合物。探究出了实验的最佳萃取条件:n(Gl C)∶n(Pd(Ⅱ))=1∶1,c(HCl)=0.05 mol/L,V过柱=1 m L/min,钯的萃取率可达99%。实验测定了小柱的萃取容量为4.8 mg/g,以丙酮为洗脱溶剂,2 m L丙酮以1 m L/min的洗脱速度能完全洗脱钯的配合物。对合成试样中的钯进行了分离和测定,效果良好。
