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1.
合成了四苯并卟啉类配合物Sn(Ⅳ)TP(o-NO2)TBPCl2,并对其进行了元素分析及红外、紫外可见吸收光谱、荧光光谱表征。  相似文献   

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3.
A series of new amphiphilic poly[methyl(3,3,3-trifluoropropyl)siloxane]-b-poly(ethylene oxide) (PMTFPS-b-PEO) diblock copolymers with different ratios of hydrophobic segment to hydrophilic segment were prepared by coupling reactions of end-functlonal PMTFPS and PEO homopolymers. Copolymers were shown to be well defined and narrow molecular weight distribution (MWD) (1.07-1.3) by characterizations such as gel permeation chromatography (GPC) and ^1H-nudear magnetic resonance (^1H-NMR).  相似文献   

4.
The objective of this study is to propose a more accurate and faster MTT 3-(4,5-dimethyl thiazol-2-yl)-2,5-diphenyl tetrazolium bromide colorimetric assay (MCA) for quantitative measurement of polypeptide bacteriocins in solutions with nisin as an example. After an initial incubation of nisin and indicator bacterium Micrococcus luteus NCIB 8166 in tubes, MTT was added for another incubation period. After that, nisin was quantified by estimating the number of viable bacteria based on measuring the amount of purple formazan produced by cleavage of yellow tetrazolium salt MTT. Then MCA was compared to a standard agar diffusion assay (ADA). The results suggested a high correlation coefficient (r2=0.975±0.004) between optical density (OD) and the inhibitory effect of nisin on a bacterial strain Micrococcus luteus NCIB 8166 at a range of 0.125~32 IU/ml. The MCA described in this study was very quick. Quantification of nisin took only 7~8 h and the detection limit was at the level of 0.125 IU/ml when compared to 12 IU/ml and 24~28 h for ADA. The MCA provides an accurate and rapid method for quantifi-cation of nisin in solutions and is expected to be used for quantification of other antimicrobial substances.  相似文献   

5.
以季戊四醇为原料,经多步合成季戊四胺,然后与2-噻吩醛反应,合成了(N1,N2),(N2,N3),(N1,N3)-三(噻吩亚甲基)-N-(噻吩亚甲基)-季戊四胺。结构经核磁和X-单晶衍射实验证实。结果表明:其晶体结构属六方晶系,空间群P6(5),Z=4,晶胞参数:a=1,8385(6)nm,b=1.8385(6)nm,c=1.3866(8)nm,a=90.00,B=90.00,1=120.00,V=4.05873nm3,F(000)=1740.0,Mu=0.39mm-1,R1=0.0719.Rw=0.214.  相似文献   

6.
以氯亚铂酸钾和自合成的5,10,15,20-四(4-羧基苯基)卟啉为原料合成了铂(Ⅱ)配合物.采用元素分析、电导测定、紫外-可见光谱、红外光谱、核磁共振和电喷雾质谱等多种物理手段表征了钯配合物的结构,对配合物的空间构型和成键性质进行了讨论.研究了配合物在氮气气氛中的热分解行为.结果表明:该配合物属于低自旋的平面正方形,配合物中离域π键和螯合环的形成使Pt-N键加强,配合物很稳定.  相似文献   

7.
报道了以乙酰基丙酸、水合肼、对硝基苯胺为原料合成目标化合物,其结构用IR,1HNMR对其表征.并对目标化合物的荧光谱性质进行了研究.  相似文献   

8.
报道了显色剂1-(4-硝基苯基)-3-(甲基苯)-三氮烯化合物(NPMT)的合成及其与镉(Ⅱ)的显色反应.在非离子表面活性剂Triton X-100存在下,pH 11.0的Na2B4O7-NaOH的缓冲介质中,该试剂能与镉(Ⅱ)与发生显色反应,形成摩尔比为4∶1的橙黄色配合物,配合物在波长465 nm处有最大吸收峰,表观摩尔吸光系数ε为2.13×106 L·mol-1·cm-1,镉(Ⅱ)浓度在0.08-0.48μg/ml范围内遵守比尔定律.用拟定方法可有效测出不同废水中的镉(Ⅱ).  相似文献   

9.
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.  相似文献   

10.
以1,4,7,10-四氮杂环十二烷(Cyclen)为原料合成了一种新型四氮杂大环化合物,目标化合物经^1H NMR、质谱、元素分析等表征.  相似文献   

11.
过渡金属化合物尤其是钛族化合物由于其结构特征,丰富多彩的化学现象和优异的催化性能受到了特别的注意。有关各种新型的钛和锆的配合物的合成、结构、与催化聚合反应的报道与日俱增。章首先合成了反应性和配位性良好的含氮的胺类配体[PhNHSi(Me)2NMe2],配体与四氯化锆作用合成了锆的配合物Zr[N(Ph)Si(Me)2N(Me)2]Cl3,并用^1H NMR对其结构进行了表征及做了X-射线晶体结构测定。  相似文献   

12.
单分子层保护的银纳米团簇的合成与表征   总被引:2,自引:0,他引:2  
以二乙基二硫代氨基甲酸钠(简称DDTC)为保护剂,在没有相转移试剂四辛基溴化铵存在的情况下,于两相体系中合成了一种新的银的单分子层保护团簇(MPCs).通过UV—Vis,TEM等表征结果表明:所制得的MPCs无论是液态还是固态均比较稳定,而且粒子尺寸分布比较窄,平均粒径8nm.同时考察了不同溶剂对其溶解度及稳定性的影响.  相似文献   

13.
用L-苯丙氨基酸和5-[对-(4-溴丁氧基)苯基]-10,15,20-三苯基卟啉合成了一种新型尾式卟啉及其锌(Ⅱ)配合物,并通过质谱、红外、紫外光谱对其结构进行了表征,测试并研究了它们在4000~400cm~(-1)范围内的傅里叶变换红外光谱,对主要谱带进行了经验归属.  相似文献   

14.
苄基取代茚基二价稀土配合物的合成与表征   总被引:3,自引:0,他引:3  
无水EuCl3与1—苄基茚基钾在四氢呋喃(THF)中以1/2的摩尔比反应,尔后用Na/K合金原位进行还原,得到了一种新的中性的二(1—苄基茚基)稀土Ⅱ配合物(1—PhCH2C9H6)2Eu(THF)2;而用SmI2与1—苄基茚基钾在THF中以1/2的摩尔比反应,合成了一种新的苄基取代茚基稀土二价配合物(1—PhCH2C9H6)2Sm(THE)2,并对其进行了元素分析及红外光谱的表征。  相似文献   

15.
以糠醛为原料通过光氧化反应生成4-羟基丁烯内酯,再与薄荷醇缩醛化制得手性合成砌块5(R)-(1R,2S,5R)-孟氧基-2(5H)-呋喃酮(1),然后使1与正十八胺进行不对称Michael加成反应,在十分温和的条件下得到标题化合物4(R)-N-正-十八氨基-5(R)-(1R,2S,5R)-孟氧基-3,3-二氢呋喃-2-酮(2)。并通过元素分析,IR,~1HNMR,~(13)CNMR和MS对其进行了结构表征。  相似文献   

16.
糠醛是一种含杂环有机化合物重要的化工产品。以蔗糖为原料微波加热回流制备5-羟甲基糠醛,探索在不同条件下对合成5-羟甲基糠醛的影响,得到最佳反应条件,硫酸为催化调节PH值1-2,微波功率为300W,在水溶液中搅拌回流40-50s,产率达90%。  相似文献   

17.
以对羟基苯甲酸为起始原料,乙酸酐保护酚羟基,PEG600作相转移催化剂,经系列反应制得一类新的N-(4-羟基苯甲酰基)-N’-芳基硫脲化合物,产率较高,纯度良好,其结构经元素分析、IR和1H NMR分析得到证实.  相似文献   

18.
本文对尾式卟啉—meso—[邻—(二甲胺基丁酰胺基)苯基]三苯卟啉的合成路线,实验方法,实验条件和产率进行了详细的研究,并用红外光谱、核磁共振谱及紫外光谱对其结构和螯合性能进行了分析。证明该化合物已合成,具有强烈的螯合能力。  相似文献   

19.
本文报道以Lewis酸AlCl_3为催化剂,以邻二甲苯和二氯乙烷为原料合成1,2-双 (3,4-二甲基苯基)乙烷的方法,该方法具有收率高,反应时间短、条件温和等优点. 实验证明,此反应条件很容易推广,具有一定的应用前景.  相似文献   

20.
由双-(3, 4-苯二甲酸酐)二甲基硅烷、均苯四甲酸酐和4, 4'-二氨基二苯醚制备了含硅聚酰胺酸. 通过溶液浇铸方法制得聚酰胺酸薄膜, 经热处理将其转化为聚酰亚胺薄膜. X-衍射测量表明, 该类型聚酰亚胺具有非晶态结构, 且规整性随双-(3, 4-苯二甲酸酐)二甲基硅烷含量的增加而减少. 含硅共聚酰亚胺与传统均苯四甲酸酐/4, 4'-二氨基二苯醚聚酰亚胺相比, 呈现较低的玻璃化转变温度和分解温度, 但共聚酰亚胺中双-(3, 4-苯二甲酸酐)二甲基硅烷含量增加将导致薄膜的透光率增加.  相似文献   

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