噻二唑类Schiff碱配合物的合成及其对超氧阴离子自由基的抑制活性

用2-氨基-5-巯基-1，3，4-噻二唑与水杨醛及氯乙酸合成了Schiff碱及与Cu(Ⅱ)、Co(Ⅱ)、Zn(Ⅱ)的配合物，并由元素分析、红外光谱、紫外可见光谱和摩尔电导等对其进行了表征．核黄素-蛋氨酸光照法进行的活性实验表明配体及配合物均对超氧离子有一定的抑制效果．     

新型单核Schiff碱钇配合物的合成

在丙酮介质中,苦味酸钇(Y)与邻苯二胺缩双香草醛(L)形成1∶1型(Y∶L)固体配合物,其结构经UV,1HNMR,IR,TG-DTA,元素分析及摩尔电导表征。结果表明,配合物属1∶2型电解质,钇离子除与配体上的两个N原子配位外,还同时与两个水分子和一个以螯合双齿形式存在的苦味酸根发生了配位,中心离子的配位数为6。配合物的可能结构式为[Y.L(Pic)(H2O)2](Pic)2.2MeCOMe。     

金刚烷胺邻香兰素Schiff碱稀土配合物的合成、表征及抗菌活性研究

The new solid complexes [LnL₂(NO₃)₂]NO₃ (L=C₁₈H₂₃NO₂, N-2-hydroxy-3-methoxy-benzaldehyde-1-aminoadamanantane, Ln=La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y) of rare earth nitrates with Schiff base derived from o-vanillin and adamantaneamine have been synthesized in non-aqueous system and characterized by elemental analysis, molar conductance, infrared spectra, ¹H NMR spectra, thermal analysis. The coordination modes of the bonding in these complexes were discussed and the possible structure were proposed. Every central Ln(Ⅲ) ion in the complexes coordinates with both two Schiff base ligands via four oxygen atoms of the phenol hydroxy groups and methoxy groups and two nitrates via their four oxygen atoms. Their coordination numbers are eight. In addition, the antibacterial activity of the Schiff base ligand and the complexes were studied.     

糠醛甘氨酸Schiff碱及其稀土La(Ⅲ)配合物的合成与表征

糠醛甘氨酸Schiff碱稀土配合物具有生理活性。本文采用分步法制得Schill碱配合物：     

Schiff碱镧配合物的合成及其催化烷基异氰酸酯聚合

通过氯化镧与Schiff碱钠盐(NaSalen)的交换反应制备了4种镧的Schiff碱配合物La(HSalen1-4)3,对其中以3,5-二叔丁基水杨醛缩苯胺为配体的配合物La(HSalen2)3进行了X-射线单晶衍射分析,测定其单晶结构为五角双锥构型,七配位的镧金属中心与氮和氧原子相连.将所得的La(HSalen)3...     

手性Schiff碱及其类似物和配合物的研究进展

简要介绍了手性Schiff碱及其类似物和配合物在催化、医药、功能材料中的应用研究进展,为同类课题的进一步研究奠定了基础。     

过渡金属胱氨酸水杨醛Schiff碱配合物的合成及抑菌活性

合成了三种胱氨酸水杨醛Schiff碱H2Cys-sal过渡金属配合物[Cu(Cys-sal)、Co(Cys-sal)、Mn(Cys-sal)];利用元素分析、紫外光谱、红外光谱、摩尔电导测定了其组成和结构;利用荧光光谱评价了其荧光特性,利用生物活性试验测定了其生物活性.结果表明,三种配合物都能强烈猝灭牛血清白蛋白(BSA)的内源荧光;配合物对金黄色葡萄球菌(S.Aureus,革兰氏阳性菌),大肠杆菌(E.Coli,革兰氏阴性菌),枯草杆菌(B.Subtilis,革兰氏阳性菌),绿脓杆菌(P.Aeruginosa,革兰氏阴性菌)均有不同程度的抑菌作用.     

新型铂配合物的合成及其抗肿瘤活性

以顺-二碘-二环戊胺合铂(Ⅱ)为起始原料,经聚合反应和胺化反应制得顺式-二碘-异丙胺-环戊胺合铂(Ⅱ)(2);2分别与氯化钾,1,1-环丁基二羧酸钾和一水合草酸钾反应,合成了3个新型的铂配合物:顺式-二氯-异丙胺-环戊胺合铂(Ⅱ)(1a,收率36.6%),顺式-1,1-环丁基二羧酸-异丙胺-环戊胺合铂(Ⅱ)(1b,收率43.6%)和顺式-草酸-异丙胺-环戊胺合铂(Ⅱ)(1c,收率28.1%),其结构经1H NMR,IR,ESI-MS和元素分析表征。采用MTT法测定了1a~1c对肝癌(SMMC-7721),肺癌(A-549),乳腺癌(MCF-7)和结肠癌(SW480)的体外抑制活性。结果表明,1a~1c对部分癌细胞的IC50值小于40μm,具有一定的体外肿瘤生长抑制活性。     

Schiff碱铜配合物的生物活性

Schiff碱及其铜配合物以良好的生物活性而被人们广泛地研究. 综述了Schiff碱铜配合物作为医药和农药的活性, 并就其发展尤其在农药方面进行了展望.     

Schiff碱双核Mn配合物的合成、结构和性能研究

Five manganese complexes of Schiff base were synthesized： [Mn^Ⅳ，Ⅳ(μ-O)(Salen)]₂·DMF·H₂O (1)， [Mn^Ⅳ，Ⅳ(μ-O)(5-BrSalen)]₂·DMF·0.5H₂O (2)， {Mn^Ⅳ，Ⅳ(μ-O)[Sal(1，2-pn)]}₂·H₂O (3)， {Mn^Ⅳ，Ⅳ(μ-O)[5-Br-Sal(1，2-pn)]}₂·H₂O (4)， {Mn^Ⅳ，Ⅳ(μ-O)[5-CH₃-Sal(1，2-pn)]}₂·2H₂O (5)， and were characterized by element analysis， IR and UV-Vis spectra. The results of cyclic voltammogram show that Schiff base ligands can drop the potential of manganese and steady high oxide state of manganese. The magnetic properties of 1 and 3 have also been studied. The results show that there is a weak ferromagnetically coupling of Mn^Ⅳ₂ pair at room and low temperature， and the interactions of complex 3 are weaker than complex 1.     

Synthesis and antioxidant activities of Schiff bases and their complexes: a review

Schiff bases, named after Hugo Schiff , are aldehyde‐ or ketone‐like compounds in which the carbonyl group is replaced by imine or azomethine group. They are widely used for industrial purposes and also have a broad range of applications as antioxidants. An overview of antioxidant applications of Schiff bases and their complexes is discussed in this review. A brief history of the synthesis and reactivity of Schiff bases and their complexes is presented. Factors of antioxidants are illustrated and discussed. Copyright © 2016 John Wiley & Sons, Ltd.     

Synthesis of novel azo Schiff bases and their antibacterial and antifungal activities

Ten new azo Schiff bases 5a-h and 7a-b were prepared in excellent yields via the condensation of different aromatic amines and a new azoaldehyde, 2-hydroxy-3- methoxy-5-(4-methoxyphenylazo)benzaldehyde (4) by two different methods. All new compounds were tested against five microorganisms: Staphylococcus aureus (Gram positive and methicillin resistant), Bacillus subtilis (Gram positive), Kelebsiella pneumonia, Pseudomonas aeruginosa and Escherichia coli (all Gram negative). Compounds 4, 5a, 5c, 5d and 5g were moderately active against Staphylococcus aureus and Bacillus subtilis. Compound 7b was highly active against Bacillus subtilis and moderately active against Staphylococcus aureus. Other compounds were inactive against these strains of bacteria. The antifungal activities of these compounds were also tested against eight different fungal species. None of them were active against the fungi species tested.     

两种含硫Schiff碱及其配合物的合成与光谱性质

合成了2-氨基噻唑缩5-溴水杨醛(HBrsatz)和2-乙酰噻吩缩4-羟基苯甲酰腙(Hetphz)两种含硫Schiff碱及其配合物[Cu(Brsatz)2](Ⅰ)和[Cd(H2O)(Hetphz)(phen)](NO3)2(Ⅱ),通过元素分析、红外光谱和紫外光谱对它们的结构进行了表征,并研究了它们在DMF溶液中的发光性质,结果表明HBrsatz和Hetphz及配合物Ⅱ具有较强的荧光发射.     

Syntheses, characterization, antimicrobial and genotoxic activities of new Schiff bases and their complexes

Two new Schiff base ligands (L¹, L²) have been prepared from the reaction of 2,6-diacetylpyridine and 2-pyridinecarboxyaldehyde with 4-amino-2,3-dimethyl-1-phenyl-3-pyrozolin-5-on, and their Co(II), Cu(II), Ni(II), Mn(II), and Cr(III) metal complexes have also been prepared. The complexes are formed by coordination of N and O atoms of the ligands. Their structures were characterized by physico-chemical and spectroscopic methods. The analytical data shows that the metal to ligand ratio in the Schiff base complexes is 1:2. The Schiff base ligands and all complexes were evaluated for their in vitro antibacterial and antifungal activities by the disc diffusion method. In addition, the genotoxic properties of the ligands were studied.     

Evaluation of biological activities of some Schiff bases and metal complexes

Several Schiff bases were synthesised from sulphonamide and resacetophenone. The characterisation was done by CHN analysis, IR and NMR spectral data. These Schiff bases were evaluated for their antimicrobial activity against both Gram-positive and Gram-negative bacteria as well as fungi. The antibacterial activity was studied against B. megaterium, E. coli, B. subtilis, P. fluorescens and antifungal activity against A. awamori. In addition, copper, nickel, cobalt, and iron complexes of two Schiff bases were also synthesised. Their structural characterisation was performed using CHN analysis and IR spectral data and their antibacterial and antifungal activities were also evaluated. The comparison of antimicrobial activities of the ligands and complexes shows that the presence of metal causes more inhibition i.e., more activity. Out of the four metals studied, cobalt and iron were found to have more antimicrobial activity.     

氯取代二苯基苯甲酰基吡唑酮席夫碱的合成与抑菌活性

酰基吡唑啉酮及其席夫碱是一类杂环β─二酮螯合剂。其活性的双酮配位基可以同多种金属或稀土离子形成大量的配合物,是金属和稀土离子良好的萃取剂和螯合剂[1~5],是一类优良的荧光材料中间体,同时表现出一定的抗菌、抗病毒性能[6~11],目前在药理、生物活性试剂、冶金、染料、发     

Synthesis and antibacterial activities of metal(II) complexes with Schiff bases derived from 3,5-diiodosalicylaldehyde

Two new Schiff bases (2,4-diiodo-6-[(2-morpholin-4-yl-ethylimino)-methyl]-phenol and 2,4-diiodo-6-[(3-morpholin-4-yl-propylimino)-methyl]-phenol), condensed from 3,5-diiodosalicylaldehyde with 2-morpholinoethylamine and 3-morpholinopropylamine, have been designed and synthesized. Reaction of the Schiff bases with Zn(OAc)₂ · 2H₂O, Cu(OAc)₂ · H₂O, Ni(OAc)₂ · 4H₂O, Co(OAc)₂ · 4H₂O, Cd(OAc)₂ · 2H₂O, Mn(OAc)₂ · 4H₂O, Fe(SO4)₂ · 7H₂O, and Hg(OAc)₂ led to the formation of 16 new mononuclear complexes. The complexes were characterized by UV, Infrared, ESI-MS, and elemental analyses, and 3,5-diiodosalicylalidene-2-morpholinoethylaminozinc(II) (1) and 3,5-diiodosalicylalidene-2-morpholinoethylaminocopper(II) (2) were characterized by single crystal X-ray diffraction. Based on crystal structural analysis of 1 and 2, coupled with their spectral similarity with 3–16, it can be concluded that 3–16 have structures similar to 1 and 2. All the complexes were assayed for antibacterial activities against three Gram positive bacterial strains (Bacillus subtilis, Staphylococcus aureus, and Streptococcus faecalis) and three Gram negative bacterial strains (Escherichia coli, Pseudomonas aeruginosa, and Enterobacter cloacae) by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide method. Among the complexes tested, 8 and 16 showed the most favorable antibacterial activity with minimum inhibitory concentration of 0.781, 12.5, 6.25, 3.125, 3.125, 6.25 and 1.562, 6.25, 1.562, 3.125, 3.125, 1.562 µg mL^?1 against B. subtilis, S. aureus, S. faecalis, P. aeruginosa, E. coli, and E. cloacae, respectively.     

Synthesis,structures, and antibacterial activities of two iron(III) complexes with Schiff bases

Two Schiff base iron(III) complexes, [FeL¹(AHA)] · H₂O (I) and [Fe(L²)₂] · ClO₄ (II), where AHA is the deprotonated form of acetohydroxamic acid, and L¹ and L² are the anionic form of N,N′-bis(3-ethoxysalicylidene)propane-1,2-diamine and 2-[1-(2-aminopropylimino)ethyl]phenol, respectively, have been synthesized and characterized by physical chemical methods and single crystal X-ray diffraction. Crystallographic data for I: orthorhombic, space group Iba2, a = 20.781(3), b = 23.527(3), c = 10.071(2) Å, V = 4923.7(12) ų, Z = 8, R ₁ = 0.0374, wR ₂ = 0.0900. Crystallographic data for II: triclinic, space group a = 12.748(1), b = 13.401(1), c = 19.007(1) Å, α = 106.623(2)°, β = 97.462(2)°, γ = 112.543(2)°, V = 2784.9(4) ų, Z = 4, R ₁ = 0.0892, wR ₂ = 0.2434. X-ray crystal structural study indicated that the coordination environment around each Fe atom in the complexes is a six-coordinated distorted octahedron. The antibacterial activities of the complexes were assayed.     

Synthesis, potentiometric and antimicrobial studies on metal complexes of isoxazole Schiff bases

The metal complexes of Cu(II), Ni(II) and Co(II) with Schiff bases of 3-(2-hydroxy-3-ethoxybenzylideneamino)-5-methyl isoxazole [HEBMI] and 3-(2-hydroxy-5-nitrobenzylidene amino)-5-methyl isoxazole [HNBMI] which were obtained by the condensation of 3-amino-5-methyl isoxazole with substituted salicylaldehydes have been synthesized. Schiff bases and their complexes have been characterized on the basis of elemental analysis, magnetic moments, molar conductivity, thermal analysis and spectral (IR, UV, NMR and Mass) studies. The spectral data show that these ligands act in a monovalent bidentate fashion, co-ordinating through phenolic oxygen and azomethine nitrogen atoms. Chelates of Co(II), Ni(II) appear to be octahedral and Cu(II) appears to be distorted octahedral. To investigate the relationship between formation constants of binary complexes and antimicrobial activity, the dissociation constants of Schiff bases and stability constants of their binary metal complexes have been determined potentiometrically in aqueous solution at 30+/-1 degrees C and at 0.1 M KNO3 ionic strength and discussed. Antimicrobial activities of the Schiff bases and their complexes were screened. The structure-activity correlation in Schiff bases and their metal(II) complexes are discussed, based on the effect of their stability constants. It is observed that the activity enhances upon complexation and the order of activity is in accordance with stability order of metal ions.