Two new coordination polymers,{[Co（O2N-Hbtb）（phen）（H2O）3]·2H2O}n 1 and {[Cu3（O2N-btb）2（bipy）2（H2O）4]·4H2O}n 2（O2N-H3btb=5-nitro-1,2,3-benzenetricarboxylic acid,phen=1,10-phenanthroline,bipy=2,2...Two new coordination polymers,{[Co（O2N-Hbtb）（phen）（H2O）3]·2H2O}n 1 and {[Cu3（O2N-btb）2（bipy）2（H2O）4]·4H2O}n 2（O2N-H3btb=5-nitro-1,2,3-benzenetricarboxylic acid,phen=1,10-phenanthroline,bipy=2,2＇-bipyridine）,were prepared through hydrothermal reactions of Co（Ⅱ） or Cu（Ⅱ） salt with O2N-H3btb in the presence of different auxiliary N-donor ligands.Their crystal structures were determined by single-crystal X-ray diffraction analysis and further characterized by elemental analysis and IR spectroscopy.In the two complexes,O2N-H3btb ligand acts as monodentate and bis-monodentate modes,respectively.Complex 1 displays a two-dimensional layered structure through the inter-and intramolecular hydrogen bonding interactions while complex 2 has an O2N-btb bridged one-dimensional chain which is extended into a three-dimensional network by hydrogen bonding interactions.The magnetic properties of complex 2 are investigated over the temperature range of 2～300 K and ferromagnetic interactions are observed.展开更多
In the present work,the experimental and the theoretical spectroscopic properties of 1-Methyl-6-Nitro-1H-Benzimidazole were investigated.The FT-IR(400~4 000cm^(-1))and FT-Raman spectra(100~4 000cm^(-1))of 1-Methyl-6-N...In the present work,the experimental and the theoretical spectroscopic properties of 1-Methyl-6-Nitro-1H-Benzimidazole were investigated.The FT-IR(400~4 000cm^(-1))and FT-Raman spectra(100~4 000cm^(-1))of 1-Methyl-6-Nitro-1H-Benzimidazole in the solid phase were recorded.Also,experimental NMR and UV spectra of titled molecule were measured.To interpret the experimental data,geometric parameters,vibrational frequencies,NMR,UV spectra and NLO analysis of the optimized molecule were calculated using ab initio Hartree–Fock(HF)method and density functional theory(B3LYP)method with the 6-31++G(d,p)and 6-311++G(d,p)basis sets.Vibrational bands were assigned based on the potential energy distribution using the VEDA 4program.The theoretical results showed good agreement with the experimental values.展开更多
In our previous work, the colour reactions of quaternary complexes of rare earths with chromazurol S, 5-nitro-1, 10-phenanthroline (5-N-phen) and cetyltrimethyl ammonium bromide (CTAB) were reported. In this paper, th...In our previous work, the colour reactions of quaternary complexes of rare earths with chromazurol S, 5-nitro-1, 10-phenanthroline (5-N-phen) and cetyltrimethyl ammonium bromide (CTAB) were reported. In this paper, the colour reactions of rare earths with eriochrome azurol B(ECB), 5-N-phen and CTAB will be systematically investigated. The results show that the sensitivity of the ECB system is higher than that of the CAS system. It is of interest to note that in the past ECB was only展开更多
2-硝基咪唑是一种重要的医药中间体,可用于合成多种抗癌药物,通过对其结构进行修饰,有望开发新型活性药物分子。以2-氨基嘧啶和3-溴丙酮酸乙酯为起始原料,经过缩合环化、肼解、氧化和取代合成了一系列1-烷基-2-硝基-1 H-咪唑-5-甲酸乙酯...2-硝基咪唑是一种重要的医药中间体,可用于合成多种抗癌药物,通过对其结构进行修饰,有望开发新型活性药物分子。以2-氨基嘧啶和3-溴丙酮酸乙酯为起始原料,经过缩合环化、肼解、氧化和取代合成了一系列1-烷基-2-硝基-1 H-咪唑-5-甲酸乙酯(7a~7d)及其同分异构体1-烷基-2-硝基-1 H-咪唑-4-甲酸乙酯(8a~8d),该方法克服了传统合成路线中氮原子上取代基仅为甲基的局限性。研究不同取代基对2种异构体比例的影响,结果表明:随着取代基团的给电子能力增强,更加有利于化合物7的生成。所有合成化合物的结构都经过1 H NMR,13 C NMR和MS(ESI)确证或表征。展开更多
This paper introduces the synthesis of a new color reagent 1-(6-nitro-2-benzothiazolyl)3-(4-nitrophenyl)-triazene (NBTNPT) and the color reaction of NBTNPT with Cd (II) has been studied. In the presence of Triton X-10...This paper introduces the synthesis of a new color reagent 1-(6-nitro-2-benzothiazolyl)3-(4-nitrophenyl)-triazene (NBTNPT) and the color reaction of NBTNPT with Cd (II) has been studied. In the presence of Triton X-100, the reagent with Cd (II) forms an orange-yellow complex (1:1) at pH=11.5-12.3, the molar absorptivity is 2.81x10(5)L . mol(-1)m(-1) by dual-wavelength spectrophotometry, Beers law is obeyed in the range of 0-280 mu g/L for Cd (II).展开更多
基金Supported by the National Natural Science Foundation of China (Nos. 20471026 and 20771054)the Henan Tackle Key Problem of Science and Technology (Nos. 072102270030 and 072102270034)2009GGJS-104
文摘Two new coordination polymers,{[Co（O2N-Hbtb）（phen）（H2O）3]·2H2O}n 1 and {[Cu3（O2N-btb）2（bipy）2（H2O）4]·4H2O}n 2（O2N-H3btb=5-nitro-1,2,3-benzenetricarboxylic acid,phen=1,10-phenanthroline,bipy=2,2＇-bipyridine）,were prepared through hydrothermal reactions of Co（Ⅱ） or Cu（Ⅱ） salt with O2N-H3btb in the presence of different auxiliary N-donor ligands.Their crystal structures were determined by single-crystal X-ray diffraction analysis and further characterized by elemental analysis and IR spectroscopy.In the two complexes,O2N-H3btb ligand acts as monodentate and bis-monodentate modes,respectively.Complex 1 displays a two-dimensional layered structure through the inter-and intramolecular hydrogen bonding interactions while complex 2 has an O2N-btb bridged one-dimensional chain which is extended into a three-dimensional network by hydrogen bonding interactions.The magnetic properties of complex 2 are investigated over the temperature range of 2～300 K and ferromagnetic interactions are observed.
文摘In the present work,the experimental and the theoretical spectroscopic properties of 1-Methyl-6-Nitro-1H-Benzimidazole were investigated.The FT-IR(400~4 000cm^(-1))and FT-Raman spectra(100~4 000cm^(-1))of 1-Methyl-6-Nitro-1H-Benzimidazole in the solid phase were recorded.Also,experimental NMR and UV spectra of titled molecule were measured.To interpret the experimental data,geometric parameters,vibrational frequencies,NMR,UV spectra and NLO analysis of the optimized molecule were calculated using ab initio Hartree–Fock(HF)method and density functional theory(B3LYP)method with the 6-31++G(d,p)and 6-311++G(d,p)basis sets.Vibrational bands were assigned based on the potential energy distribution using the VEDA 4program.The theoretical results showed good agreement with the experimental values.
文摘In our previous work, the colour reactions of quaternary complexes of rare earths with chromazurol S, 5-nitro-1, 10-phenanthroline (5-N-phen) and cetyltrimethyl ammonium bromide (CTAB) were reported. In this paper, the colour reactions of rare earths with eriochrome azurol B(ECB), 5-N-phen and CTAB will be systematically investigated. The results show that the sensitivity of the ECB system is higher than that of the CAS system. It is of interest to note that in the past ECB was only
文摘2-硝基咪唑是一种重要的医药中间体,可用于合成多种抗癌药物,通过对其结构进行修饰,有望开发新型活性药物分子。以2-氨基嘧啶和3-溴丙酮酸乙酯为起始原料,经过缩合环化、肼解、氧化和取代合成了一系列1-烷基-2-硝基-1 H-咪唑-5-甲酸乙酯(7a~7d)及其同分异构体1-烷基-2-硝基-1 H-咪唑-4-甲酸乙酯(8a~8d),该方法克服了传统合成路线中氮原子上取代基仅为甲基的局限性。研究不同取代基对2种异构体比例的影响,结果表明:随着取代基团的给电子能力增强,更加有利于化合物7的生成。所有合成化合物的结构都经过1 H NMR,13 C NMR和MS(ESI)确证或表征。
文摘This paper introduces the synthesis of a new color reagent 1-(6-nitro-2-benzothiazolyl)3-(4-nitrophenyl)-triazene (NBTNPT) and the color reaction of NBTNPT with Cd (II) has been studied. In the presence of Triton X-100, the reagent with Cd (II) forms an orange-yellow complex (1:1) at pH=11.5-12.3, the molar absorptivity is 2.81x10(5)L . mol(-1)m(-1) by dual-wavelength spectrophotometry, Beers law is obeyed in the range of 0-280 mu g/L for Cd (II).
