共查询到19条相似文献,搜索用时 78 毫秒
1.
合成了 L a( NO3 ) 3 · 4Im· 2 HNO3 · H2 O,Nd( NO3 ) 3 · 4Im· HNO3 · H2 O,Eu( NO3 ) 3 ·3 Im· HNO3 · H2 O三种新配合物。测定了它们的溶解性 ,用 EDTA容量法和元素分析确定了它们的组成 ,通过红外、紫外及 X-射线对它们进行了表征。 相似文献
2.
以Sm(NO3)3,6H2O和丁二酸为原料,采用水热合成法合成了1种新型三维微孔稀土金属配位聚合物{Sm2(C12H12O12)3(HO2)2}n.通过元素分析确定标题化合物的元素值,同时用热重表征标题配合物,晶体结构经X射线单晶衍射仪分析确定,标题配合物的晶系为三斜晶系,P-1空间群,晶胞学数据:a=0.77624(15)nm,b=0.80853(10)nm,c=1.41600(3)nm,α=96.9010(3)°,β=97.0200(3)°,γ=103.364(3)°,V=0.848(3)nm^3,Z=2,F(000)=640,R1=0.0530[I〉2σ(I)],wR2=0.1427. 相似文献
3.
稀土硝酸盐与咪唑配合物的合成及表征 总被引:1,自引:0,他引:1
合成了La(NO3)3·4Im·2HNO3·H2O,Nd(NO3)3·4Im·HNO3·H2O,Eu(NO3)3·3Im·HNO3·H2O三种新配合物.测定了它们的溶解性,用EDTA容量法和元素分析确定了它们的组成,通过红外、紫外及X-射线对它们进行了表征. 相似文献
4.
利用溶液法合成了[Ni(mal)(Im)3]配合物,同时对该配合物进行红外光谱、X-衍射等表征,结果表明:该配合物为正交晶系,空间群为P 21/c,a = 8.4036(16)(A) , b = 8.4820(17)(A), c = 22.320(4) (A),V=1590.8(5)(A)3, Z=20. 相似文献
5.
6.
7.
根据桥联配体的特性,通过中间体二(2–吡啶甲基)胺(DPA)的合成,设计并合成3个含N、O的配体,分别是:三(2–吡啶甲基)胺(TPA)、二(2–吡啶甲基)(6–氯甲基–2–吡啶甲基)胺(TPA-Cl)、N–苯甲酰–2–甲苯羟胺(BOTHAH).合成DPA和TPA时,采用醛胺缩合形成席夫碱并进行还原,即"一锅法".再以2,6–吡啶二甲酸为原料通过酯化、还原、氯变、取代反应合成2,6–二氯甲基吡啶,与DPA反应生成TPA的衍生物.同时,以2–硝基甲苯为原料,通过锌粉还原生成2–甲苯羟胺,2–甲苯羟胺与苯甲酰氯发生酰化反应,合成异羟肟酸型的N、O配体BOTHAH.并用1H,NMR分别对DPA、TPA、TPA-Cl、BOTHAH配体进行结构表征分析,采用红外吸收光谱表征相关过渡金属配合物的结构. 相似文献
8.
探索了稀土氨基酸咪唑三元配合物的合成条件,合成了稀土高氯酸盐与甘氨酸及咪唑的三元配合物,用化学分析、摩尔电导、紫外光谱、红外光谱等手段对配合物进行了表征,确定了配合物的组成为[RE(Gly),Im](ClO4)y·2H2O(RE=La,x=3,y=3;RE=Nd,x=2,y=3). 相似文献
9.
利用铜粉直接和双膦配体、2-噻酚甲酰三氯丙酮反应,合成阵种双核铜(1)配合物「CuL(C8H3O2SF3)」2(L=dppm,dppe,dppp,dppb)。通过元素分析、红外光谱、摩尔电导、分子量、TG、X射线粉末衍射对其进行表征。 相似文献
10.
合成了La(NO3)3·2Ala·2Im·3HNO3·2H2O,Pu(NO3)3·2Ala·2Im·3HNO3 ,Nd(NO3)3·2Ala·2Im·3HNO3·2H2O, Sm(NO3)3·2Ala·2Im·3HNO3·2H2O四种新配合物.测定了它们的溶解性,用EDTA容量法和元素分析确定了它们的组成,通过红外、紫外及X-射线对它们进行了表征. 相似文献
11.
Structure of the inositol 1,4,5-trisphosphate receptor binding core in complex with its ligand 总被引:8,自引:0,他引:8
Bosanac I Alattia JR Mal TK Chan J Talarico S Tong FK Tong KI Yoshikawa F Furuichi T Iwai M Michikawa T Mikoshiba K Ikura M 《Nature》2002,420(6916):696-700
In a variety of cells, the Ca2+ signalling process is mediated by the endoplasmic-reticulum-membrane-associated Ca2+ release channel, inositol 1,4,5-trisphosphate (InsP3) receptor (InsP3R). Being ubiquitous and present in organisms ranging from humans to Caenorhabditis elegans, InsP3R has a vital role in the control of cellular and physiological processes as diverse as cell division, cell proliferation, apoptosis, fertilization, development, behaviour, memory and learning. Mouse type I InsP3R (InsP3R1), found in high abundance in cerebellar Purkinje cells, is a polypeptide with three major functionally distinct regions: the amino-terminal InsP3-binding region, the central modulatory region and the carboxy-terminal channel region. Here we present a 2.2-A crystal structure of the InsP3-binding core of mouse InsP3R1 in complex with InsP3. The asymmetric, boomerang-like structure consists of an N-terminal beta-trefoil domain and a C-terminal alpha-helical domain containing an 'armadillo repeat'-like fold. The cleft formed by the two domains exposes a cluster of arginine and lysine residues that coordinate the three phosphoryl groups of InsP3. Putative Ca2+-binding sites are identified in two separate locations within the InsP3-binding core. 相似文献
12.
Lu Wei-bing Wang Cun-xin Deng Li-zhi Zhou Xiao-hai Ren Jian-guoCollege of Chemistry Molecular Sciences Wuhan University Wuhan Hubei China 《武汉大学学报:自然科学英文版》2003,8(2):428-432
A new dinucleating ligand having two metal-binding sites has been designed and synthesized as model ligand for Cytochrome c Oxidase. The corresponding heterodi-nuclear complex, as an active site model of Cytochrome c Oxidase, consisting of a porphyrinatocobalt compound covalently linked with a copper derivative of tris(2-benzimidazylmethyl) amine bearing three benzimidazole ligands for copper was synthesized and spectroscopically characterized. The spectra data suggest that there are interactions between the cobalt and copper coordination units. The cobalt is coordinated to four central nitrogens of the porphyrin and the copper has pentaco-ordinate geometry with the four tertiary amine nitrogens and a chloride. 相似文献
13.
以甘氨酸和金属锰盐为主要原料,制备甘氨酸锰络合物,探讨反应温度、反应时间、反应体系p H值等因素对甘氨酸锰产率的影响,确定最佳合成工艺,并通过红外光谱表征产物结构.实验结果显示,制备甘氨酸锰的最佳反应条件为反应温度70℃,反应时间2.5 h,反应体系p H5~6,在最佳条件下制备的甘氨酸锰络合物的产率为47.86%;红外光谱证明产物为甘氨酸锰络合物. 相似文献
14.
将4,4′-二甲基二苯胺依次经硝化和还原后,合成了双(4-甲基-2-氨基苯基)胺.此化合物与三苯基氯甲烷进行N-烷基化反应,高产率地得到了一种新的氨基-NNN钳形配体2,2′-二(三苯甲基氨基)-4,4′-二甲基二苯胺.该配体在空气中稳定,且能与(t-BuO)3W≡CPh反应形成一种新型的钨卡宾配合物.通过核磁共振、X-射线单晶衍射等方法对该卡宾配合物研究发现,配体的3个N原子并未全部参与配位,而是有1个N原子取代基上的苯环参与了配位.通过DFT计算,发现NNC型配合物比NNN型配合物能量更低. 相似文献
15.
16.
XING Yongheng ZHANG Yuanhong XU Yongting ZHANG Baoli NIU Shuyun BAI Fengying 《科学通报(英文版)》2006,51(18):2189-2196
Coordination chemistry of pyrazole-base ligands has been extensively studied since the poly(pyrazole)borate was invented by Trofimenko in 1966[1―4]. A variety of bidentate or multidentate pyrazole-derived ligands have been employed in coordination chemis… 相似文献
17.
以2-甲基-4-硝基咪唑为原料按照文献方法合成了1,2-二[1-(2-甲基-4-硝基咪唑)]乙烷配体,进而制备了其铜、银配合物,通过紫外吸收光谱、荧光光谱及黏度法研究所合成的有机配体及其配合物与DNA相互作用模式,并以二倍稀释法研究抗厌氧菌的活性。结果表明,目标化合物与DNA相互作用方式可能为部分插入,并伴随有静电式结合。Cu,Ag配合物对两种厌氧菌菌株的抗菌性相对配体明显增强。 相似文献
18.
YaoMing Xiao JiHuai Wu QingHua Li GuiXiang Xie GenTian Yue HaiFeng Ye Zhang Lan MiaoLiang Huang JianMing Lin 《科学通报(英文版)》2010,55(10):980-985
A TiO2 slurry was prepared by hydrothermal treating mixture of commercial TiO2 (P25),ethanol and distilled water in an autoclave.A flexible photoanode and dye-sensitized solar cell (DSSC) was fabricated on an ITO-coated poly (ethylene naphthalate) sheet (ITO/PEN) substrate by a doctor-blade technique.The sample was characterized with SEM,UV-vis,FTIR,and the photoelectric properties of the DSSC were measured.The influence of preparation conditions on the properties of the flexible DSSC was investigated.It is... 相似文献
19.
采用以均苯三甲酸为内核的树形分子(DT)模板法,原位制备AgI纳米簇,得到AgI/DT纳米复合材料.研究了AgI纳米簇生成过程中的各种影响因素,并用紫外一可见光谱、荧光光谱、透射电镜等对所制备的纳米簇进行表征.实验发现,在中性条件下,DT4.5本身有较强的荧光,当与银离子络合后,其荧光强度明显降低,而生成AgLZDT4.5后,荧光强度进一步降低,同时出现由于AgI纳米簇表面电荷转移所产生的新的荧光峰.当Ag^+与树形分子摩尔比为30:1时所制得的AgI纳米簇的粒径小,分布均匀,稳定性好. 相似文献