本文报道用a-萘胺和琥珀酸酐合成1-萘基-琥珀酰亚胺(NPr),并用FT-IR、DSC、X-射线衍射和荧光等方法研究了该化合物的结构与性能.DSC和X-射线衍射结果表明,纯净NPr的熔点与John L Hubbard报道结果(147～149℃)不同,应为(158.3±0.2...本文报道用a-萘胺和琥珀酸酐合成1-萘基-琥珀酰亚胺(NPr),并用FT-IR、DSC、X-射线衍射和荧光等方法研究了该化合物的结构与性能.DSC和X-射线衍射结果表明,纯净NPr的熔点与John L Hubbard报道结果(147～149℃)不同,应为(158.3±0.2℃);熔融淬火样品仍存在部分结晶,并且在一定温度下发生冷结晶;FT-IR结果表明羰基伸缩振动产生反对称振动(1705cm-1)和对称振动(1779cm-1)的能级分裂;荧光光谱结果则进一步表明该化合物的电子云排布结构与单体萘环相似,其原因可归于羰基的诱导效应和共轭效应对氮原子的影响.展开更多
Three poly(aryl ether sulfone)s containing 1,4-naphthylene moiety were prepared by the nucleophilic polycondensation of 1-chloro-4-(4-chlorobenzenesulfonyl)naphthalene(CCBSN) with 4,4-isopropylidene diphenol(BPA), 1...Three poly(aryl ether sulfone)s containing 1,4-naphthylene moiety were prepared by the nucleophilic polycondensation of 1-chloro-4-(4-chlorobenzenesulfonyl)naphthalene(CCBSN) with 4,4-isopropylidene diphenol(BPA), 1,4-hydroquinone(HQ) and 4-(4-hydroxyphenyl)(2H) phthalazin-1-one(DHPZ), respectively. The polymers were characterized by FT-IR, .1H NMR, WAXD and TGA techniques. The polymers obtained had high glass transition temperatures and good thermal stability. All the polymers were soluble in most common organic solvents.展开更多
A method was developed for the simultaneous determination of seven trace impurities (Cd, Mn, Pb, Zn, Cu, Fe and Ni) in high purity cobalt oxide by ICP AES. The matrix effect was eliminated by preci pitation with 1 nit...A method was developed for the simultaneous determination of seven trace impurities (Cd, Mn, Pb, Zn, Cu, Fe and Ni) in high purity cobalt oxide by ICP AES. The matrix effect was eliminated by preci pitation with 1 nitroso 2 naphthol. The matrix effect of cobalt on the absorptions of trace impurities, the effects of reaction time, pH value, dosage of precipitant on the formation of cobalt 1 nitroso 2 naphthol complex, the effects of hydrochloric acid on the stability of this complex and masking of elements were studied. Recoveries of the impurities in spiked sample are from 90% to 110% with a precision of 1.1% 5.0% RSD. The detection limits of the seven elements are in the range of 0.01 0.24μg/g. The method can be applied to the analysis of high purity cobalt metal, cobalt oxide and other cobalt compounds.展开更多
Objective： A series of 2-benzylideneaminonaphthothiazoles were designed and synthesized incorporating the lipophilic naphthalene ring to render them more capable of penetrating various biomembranes. Methods： Schiff ...Objective： A series of 2-benzylideneaminonaphthothiazoles were designed and synthesized incorporating the lipophilic naphthalene ring to render them more capable of penetrating various biomembranes. Methods： Schiff bases were synthesized by the reaction of naphtha[1,2-d]thiazol-2-amine with various substituted aromatic aldehydes. 2-（2＇-Hydroxy）ben- zylideneaminonaphthothiazole was converted to its Co（Ⅱ）, Ni（Ⅱ） and Cu（Ⅱ） metal complexes upon treatment with metal salts in ethanol. All the compounds were evaluated for their antibacterial activities by paper disc diffusion method with Gram positive Staphylococcus aureus and Staphylococcus epidermidis and Gram negative Escherichia coli and Pseudomonas aeruginosa bacteria. The minimum inhibitory concentrations of all the Schiff bases and metal complexes were determined by agar streak dilution method. Results： All the compounds moderately inhibited the growth of Cram positive and Gram negative bacteria. In the present study among all Schiff bases 2-（2＇-hydroxy）benzylideneaminonaphthothiazole showed maximum inhibitory activity and among metal complexes Cu（Ⅱ） metal complex was found to be most potent. Conclusion： The results obtained validate the hypothesis that Schiff bases having substitution with halogens, hydroxyl group and nitro group at phenyl ring are required for the antibacterial activity while methoxy group at different positions in the aromatic ring has minimal role in the inhibitory activity. The results also indicated that the metal complexes are better antibacterial agents as compared to the Schiff bases.展开更多
In this paper a modified two-step procedure for synthesis of N-（1-naphthyl） suecinimide （NaS） was developed, and the molecular structure of NaS was properly characterized by XRD, FT-IR, 1H NMR, DSC, etc. The resul...In this paper a modified two-step procedure for synthesis of N-（1-naphthyl） suecinimide （NaS） was developed, and the molecular structure of NaS was properly characterized by XRD, FT-IR, 1H NMR, DSC, etc. The results show that the melting point of our product is 159 ℃-160.5 ℃, and the characteristic infrared absorption band of carbonyl group splits into two peaks （1705cm^-3/1779cm^-3）, which are found to be quite different from the documented data （rap 147℃ -149℃; IR C=0-1700cm^-3）. Besides, photophysical spectroscopy was found to be powerful to study the molecular structure and crystal morphology of NaS compound.展开更多
文摘本文报道用a-萘胺和琥珀酸酐合成1-萘基-琥珀酰亚胺(NPr),并用FT-IR、DSC、X-射线衍射和荧光等方法研究了该化合物的结构与性能.DSC和X-射线衍射结果表明,纯净NPr的熔点与John L Hubbard报道结果(147～149℃)不同,应为(158.3±0.2℃);熔融淬火样品仍存在部分结晶,并且在一定温度下发生冷结晶;FT-IR结果表明羰基伸缩振动产生反对称振动(1705cm-1)和对称振动(1779cm-1)的能级分裂;荧光光谱结果则进一步表明该化合物的电子云排布结构与单体萘环相似,其原因可归于羰基的诱导效应和共轭效应对氮原子的影响.
文摘Three poly(aryl ether sulfone)s containing 1,4-naphthylene moiety were prepared by the nucleophilic polycondensation of 1-chloro-4-(4-chlorobenzenesulfonyl)naphthalene(CCBSN) with 4,4-isopropylidene diphenol(BPA), 1,4-hydroquinone(HQ) and 4-(4-hydroxyphenyl)(2H) phthalazin-1-one(DHPZ), respectively. The polymers were characterized by FT-IR, .1H NMR, WAXD and TGA techniques. The polymers obtained had high glass transition temperatures and good thermal stability. All the polymers were soluble in most common organic solvents.
文摘A method was developed for the simultaneous determination of seven trace impurities (Cd, Mn, Pb, Zn, Cu, Fe and Ni) in high purity cobalt oxide by ICP AES. The matrix effect was eliminated by preci pitation with 1 nitroso 2 naphthol. The matrix effect of cobalt on the absorptions of trace impurities, the effects of reaction time, pH value, dosage of precipitant on the formation of cobalt 1 nitroso 2 naphthol complex, the effects of hydrochloric acid on the stability of this complex and masking of elements were studied. Recoveries of the impurities in spiked sample are from 90% to 110% with a precision of 1.1% 5.0% RSD. The detection limits of the seven elements are in the range of 0.01 0.24μg/g. The method can be applied to the analysis of high purity cobalt metal, cobalt oxide and other cobalt compounds.
文摘Objective： A series of 2-benzylideneaminonaphthothiazoles were designed and synthesized incorporating the lipophilic naphthalene ring to render them more capable of penetrating various biomembranes. Methods： Schiff bases were synthesized by the reaction of naphtha[1,2-d]thiazol-2-amine with various substituted aromatic aldehydes. 2-（2＇-Hydroxy）ben- zylideneaminonaphthothiazole was converted to its Co（Ⅱ）, Ni（Ⅱ） and Cu（Ⅱ） metal complexes upon treatment with metal salts in ethanol. All the compounds were evaluated for their antibacterial activities by paper disc diffusion method with Gram positive Staphylococcus aureus and Staphylococcus epidermidis and Gram negative Escherichia coli and Pseudomonas aeruginosa bacteria. The minimum inhibitory concentrations of all the Schiff bases and metal complexes were determined by agar streak dilution method. Results： All the compounds moderately inhibited the growth of Cram positive and Gram negative bacteria. In the present study among all Schiff bases 2-（2＇-hydroxy）benzylideneaminonaphthothiazole showed maximum inhibitory activity and among metal complexes Cu（Ⅱ） metal complex was found to be most potent. Conclusion： The results obtained validate the hypothesis that Schiff bases having substitution with halogens, hydroxyl group and nitro group at phenyl ring are required for the antibacterial activity while methoxy group at different positions in the aromatic ring has minimal role in the inhibitory activity. The results also indicated that the metal complexes are better antibacterial agents as compared to the Schiff bases.
基金Natural Science Foundation of China (50273014, 29928003)Natural Science Foundation of Tianjin (03380261).
文摘In this paper a modified two-step procedure for synthesis of N-（1-naphthyl） suecinimide （NaS） was developed, and the molecular structure of NaS was properly characterized by XRD, FT-IR, 1H NMR, DSC, etc. The results show that the melting point of our product is 159 ℃-160.5 ℃, and the characteristic infrared absorption band of carbonyl group splits into two peaks （1705cm^-3/1779cm^-3）, which are found to be quite different from the documented data （rap 147℃ -149℃; IR C=0-1700cm^-3）. Besides, photophysical spectroscopy was found to be powerful to study the molecular structure and crystal morphology of NaS compound.
