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1.
A novel lactone derived from dehydroabietic acid,C20H21BrO4,has been charac-terized by IR,1H NMR,13C NMR and single-crystal X-ray diffraction method.It crystallizes in orthorhombic,space group P212121 with a = 6.4195(15),b = 11.535(3),c = 24.654(6) ,V = 1825.5(7) 3,Z = 4,Mr = 405.28,Dc = 1.475 g/cm3,λ = 0.71075 ,μ(MoKα) = 2.27 mm-1,F(000) = 832,the final R = 0.024 and wR = 0.045 for 2152 observed reflections with I 2σ(I).The molecules of lactone are mainly linked through intermolecular hydrogen bonds. 相似文献
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TlTaS3 was prepared by applying a sequence of two melting processes with mixtures of Tl2S, Ta, and S having different molar metal to sulphur ratios. TlTaS3 crystallises in space group Pnma with a = 9.228(3)Å, b = 3.5030(6)Å, c = 14.209(3)Å, V = 459.3(2)Å3, Z = 4. The structure is closely related to the NH4CdCl3‐type. Characteristic features of the structure are chains of edge‐sharing [Ta(+5)S4S2/2]2 double octahedra running along [010]. These columns are linked by Tl+ ions. The Tl+ ion is surrounded by eight S2— anions to form a distorted bi‐capped trigonal prism. The Tl+ ions are shifted from the centre of the trigonal prism toward one of the rectangular faces. This is discussed in context with other isostructural compounds. TlTaS3 is a semiconductor. The electronic structure is discussed on the base of band structure calculations performed within the framework of density functional theory. 相似文献
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The compound 15α-hydroxyl-oleanolic acid was biotransformed from oleanolic acid with Colletotrichum lini AS3.4486,and its structure was characterized by 1H NMR,13C NMR,HR-ESI-MS and single-crystal X-ray diffraction.The crystal of the title compound belongs to monoclinic,space group R3 with a=34.255(5),b=34.255(5),c=6.8671(14),β=90°,Z=9,V=6978(2)3,Mr=490.70,Dc=1.051 mg/m3,μ=0.069 mm-1,F(000)=2430,R=0.0375 and wR=0.0808.The title compound is stacked into a three-dimensional network through hydrogen bonds. 相似文献
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以5-氨基烟酸(5-anaH)为配体,采用水热法合成了1个锌(Ⅱ)的二维配位聚合物[Zn(5-ana)2]n(1)。通过元素分析、红外光谱、热重(TGA)和X-射线粉末衍射(PXRD)等手段对其进行了表征,并用X-射线单晶衍射法测定了配位聚合物的单晶结构。该配位聚合物属于正交晶系,P212121空间群,为2D层状结构。我们在室温下对其二次谐波产生效率及荧光性质进行了研究,结果表明,该配位聚合物具有二级非线性光学效应,可作为潜在的二阶非线性光学材料,配位聚合物荧光相对于配体5-氨基烟酸发生了蓝移。 相似文献
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以5-氨基烟酸(5-anaH)为配体,采用水热法合成了1个锌(Ⅱ)的二维配位聚合物[Zn(5-ana)2]n(1)。通过元素分析、红外光谱、热重(TGA)和X-射线粉末衍射(PXRD)等手段对其进行了表征,并用X-射线单晶衍射法测定了配位聚合物的单晶结构。该配位聚合物属于正交晶系,P212121空间群,为2D层状结构。我们在室温下对其二次谐波产生效率及荧光性质进行了研究,结果表明,该配位聚合物具有二级非线性光学效应,可作为潜在的二阶非线性光学材料,配位聚合物荧光相对于配体5-氨基烟酸发生了蓝移。 相似文献
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Artem'eva V. N. Kostereva T. A. Kukarkina N. V. Praslova O. E. Fedorova G. N. Samarin V. P. Sazanov Yu. N. Sidorovich A. V. Panov Yu. N. Kudryavtsev V. V. 《Russian Journal of Applied Chemistry》2002,75(12):1999-2004
The possibility of using H complexes of dialkyl dihydrogen 3,3',4,4'-benzophenonetetracarboxylates and 4,4'-diaminodiphenyl ether and of polyimides prepared therefrom as polyimide foam materials, carbon-reinforced plastics, and foam composites was examined. 相似文献
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以5-氨基四唑(ATZ)和氢氧化铯溶液为原料, 制备了配合物Cs(ATZ)并培养出单晶, 结构由X-ray单晶衍射测定. 晶体属正交晶系, 空间群Pnma, 晶体学参数: a=0.8114(4) nm, b=0.6907(4) nm, c=0.9122(5) nm, V=0.5113(5) nm3, Dc=2.819 g/cm3, Z=4, F(000)=392, m=7.112 mm-1, R=0.0485. 其中Cs+与9个氮原子配位, 分子间通过氢键、金属离子与N原子的桥连接及分子间作用力, 形成三维结构, 增加了晶体结构的稳定性. 同时, 用红外、拉曼光谱对配合物进行了表征. 根据测得的ATZ及Cs(ATZ)在氢氧化铯溶液中的反应焓和溶解焓, 算得配合物Cs(ATZ)标准摩尔生成焓为 (-430.56±0.43) kJ•mol-1. 相似文献
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HAN Zheng bo WANG Xiu li WANG Li WANG En bo ** LUAN Guo you Department of Chemistry Northeast Normal University Changchun P. R. China HU Ning hai JIA Heng qing Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun P. R. China 《高等学校化学研究》2003,19(2):127-131
IntroductionIn the last few years there has been a rapidlygrowing number of reports in the literature ad-dressing the use of polyoxometalate- based hybridmaterials as catalysts,non- linear optical materialsand anti- virus drugs[1— 5] . In all the cases men-tioned above,the size,the shape and the chargesof the inorganic counter anions strongly affect theproperties of the materials. Polyoxometalates arelarge in size and high in electron accepting abili-ty[6] .They can form novel compounds with … 相似文献
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本文合成了一个新的配合物Co(H2CA)2(H2O)2(H3CA=三聚氰酸),并通过元素分析、红外、荧光和单晶X-Ray射线进行了表征。标题化合物属于三斜晶系,P1空间群,a=0.503 83(7)nm,b=0.699 82(10)nm,c=0.911 08(13)nm,α=90.107(2)°,β=98.032(2)°,γ=110.788(2)°,V=0.296 92(7)nm3,Z=1,R=0.038 2。在配合物中,Co(Ⅱ)离子与三聚氰酸配体上的N原子,配位水的O原子配位,形成规则的平面正方形配位构型。相邻的2个Co(Ⅱ)平面四边形单元通过配体三聚氰酸上的氢键形成三维网状结构。室温荧光光谱测定表明该化合物在420 nm处有强的荧光发射。 相似文献
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Two new Schiff base benzoyl hydrazone compounds, C14H10FN3O3 (Ⅰ) and C14H10F2N2O (Ⅱ), have been synthesized and characterized by elemental analysis, IR, UV and X-ray single-crystal diffraction. Both compounds crystallize in monoclinic, space group P21/c with a = 7.0514(14), b = 25.928(5), c = 7.7099(15), β = 111.823(2)°, V = 1308.6(4)3, Z = 4, C14H10FN3O3, Mr = 287.25, Dc = 1.458 g/cm3, μ(MoKα) = 0.115 mm-1, F(000) = 592, the final R = 0.0841 and wR = 0.2489 for 1901 observed reflections (I > 2σ(I)) for I; a = 11.232(3), b =12.735(4), c = 8.612(2) , β = 90.869(3)°, V = 1231.7(6)3, Z = 4, C14H10F2N2O, Mr = 260.24, Dc = 1.403 g/cm3, μ(MoKα) = 0.111 mm-1, F(000) = 536, the final R = 0.0453 and wR = 0.1085 for 1317 observed reflections (I > 2σ(I)) for Ⅱ. The antibacterial activities of both compounds against two bacteria were first studied and one compound showed considerable antibacterial activity against K. Pneumonia and S. aureus. 相似文献
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1 INTRODUCTION Nonlinear optical second harmonic generation(SHG) material is one important embranchment ofnonlinear optical materials. The main advantages oforganic nonlinear optical materials over the inor-ganic ones are as follows: bigger nonline… 相似文献
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合成了两种双核铽配合物[Tb(4-BrBA)2(Phen)(NO3)]2 (1)和[Tb(4-BrBA)3(2,2′-bipy)(H2O)]2·2H2O (2)(4-BrBA=4-溴苯甲酸根,Phen=1,10-邻菲咯啉,2,2′-bipy=2,2′-联吡啶),并用X-射线单晶衍射结构分析方法测定了其晶体结构。这2种配合物均是具有反演中心的二聚体。在四元混配配合物1中,2个Tb3+离子被4个4-溴苯甲酸根以双齿桥联和三齿桥联两种方式联结;每个Tb3+离子与邻菲咯啉的2个氮原子、硝酸根的2个氧原子和4个桥联4-溴苯甲酸根的5个氧原子配位;Tb3+离子的配位数为9。在配合物2中,2个Tb3+离子被4个4-溴苯甲酸根以双齿桥联方式联结;每个Tb3+离子与2,2′-联吡啶的2个氮原子、水分子的1个氧原子、4个双齿桥联4-溴苯甲酸根的4个氧原子以及1个单齿配位4-溴苯甲酸根的1个氧原子配位;Tb3+离子的配位数为8。配合物2中游离水分子与配位水分子以及4-溴苯甲酸根之间形成了氢键,氢键将双核分子2连接成一维链状结构。配合物1和2在紫外灯照射下均发出强烈的绿光,它们的荧光光谱在490、545、585和621 nm处出现4条谱线,这是由Tb3+离子的 5D4 → 7Fj(j=6~3)跃迁产生的。 相似文献
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利用对乙酰氨基苯甲酸(HPABA)和邻菲咯啉(phen)、硝酸铜在DMF/CH3OH/H2O溶液中合成了单核铜配合物[Cu(PABA)(phen)(H2O)2]·(NO3)·H2O(1),然后又和4,4’-联吡啶(4,4’-bpy)、硝酸锌在DMF/CH3OH/H2O溶液中获得配位聚合物{[Zn(PABA)2(4,4’-bpy)]·4H2O}n(2)。根据X射线衍射分析结果,配合物1中每个铜离子周围有2个氮原子和3个氧原子与之配位形成畸变的四方锥配位构型,然而在配合物2中,六配位八面体构型的锌离子通过配体4,4’-联吡啶扩展为一维Zigzag型链。分别对这两个配合物的热稳定性和电化学性质进行了研究。 相似文献
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利用对乙酰氨基苯甲酸(HPABA)和邻菲咯啉(phen)、硝酸铜在DMF/CH3OH/H2O溶液中合成了单核铜配合物[Cu(PABA)(phen)(H2O)2]·(NO3)·H2O(1),然后又和4,4′-联吡啶(4,4′-bpy)、硝酸锌在DMF/CH3OH/H2O溶液中获得配位聚合物{[Zn(PABA)2(4,4′-bpy)]·4H2O}n(2)。根据X射线衍射分析结果,配合物1中每个铜离子周围有2个氮原子和3个氧原子与之配位形成畸变的四方锥配位构型,然而在配合物2中,六配位八面体构型的锌离子通过配体4,4′-联吡啶扩展为一维Zigzag型链。分别对这两个配合物的热稳定性和电化学性质进行了研究。 相似文献
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制备了具有非线性特性的标题化合物,以降温法培养出25mm×40mm×13mm大尺寸单晶,该单晶在1064nm的Nd3+:YAG激光束照射下,产生绿色的532nm倍频光,以X射线衍射法测定了此1:1:2加合物的晶体结构,晶体属P1空间群,a=0.5269(1)nm,b=0.8040(1)nm,c=0.9783(2)nm,α=106.14(1)°,β=97.27(1)°,γ=101.64(1)°,Z=1,R=0.062.L-精氨酸与顺丁烯二酸之间以氢键相联,形成三维氢键网络。 相似文献
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A planar transition metal complex Cu(L)2 (L = (E)-benzyl-2-(4-nitrobenzylidene)-hydrazinecarbodithioate) has been prepared and determined by X-ray single-crystal diffraction. The crystal belongs to the monoclinic system,space group P21/c with a = 6.7101(11),b = 16.952(3),c = 13.962(3) ,β = 92.458(4)°,V = 1586.7(5) 3,Z = 4,Mr = 724.33,Dc = 1.516 g·m-3,μ = 0.998 mm-1,F(000) = 742,S = 1.021,R = 0.0634 and wR = 0.1077 for 813 observed reflections with Ⅰ 2σ(Ⅰ) and 205 parameters. In the molecular structure of the title complex,the copper atom exhibits a slightly distorted square-planar geometry in which the basal plane is defined by two N and two S atoms from two bidentate ligands. The complex was evaluated for its antitumor activity against two kinds of cell lines (MKN45 and HepG2) by MTT method. The preliminary bioassay indicates that the complex exhibits weak antitumor activity. 相似文献
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A. Budimir T. Benković V. Tomišić A. Gojmerac Ivšić N. Galić 《Journal of solution chemistry》2013,42(10):1935-1948
The kinetics of hydrolysis of N′-salicylidene-3-pyridinecarbohydrazide (1) and N′-(2-hydroxy-3-methoxyphenylmethylidene)-3-pyridinecarbohydrazide (2) were investigated in the dioxane/water (1/1, volume ratio) solvent system in acidic and basic media, and the corresponding reaction mechanisms were proposed. The kinetic results suggest that in the acidic solutions the rate-determining step of the hydrolysis reaction is the attack of a water molecule on the protonated azomethine group, whereas in the basic medium it is the attack of water on the completely deprotonated hydrazone. By analyzing the temperature dependence of the reaction rates, the thermodynamic activation parameters, i.e. activation enthalpy and entropy, were also evaluated and discussed. The complexation reactions of vanadium(V) with aroylhydrazones 1 and 2 as well as the extraction of V(V) from aqueous to an organic phase were studied spectrophotometrically. The optimum conditions for complex formation and extraction of vanadium(V) into chloroform solutions of compounds 1 or 2 have been evaluated. Based on the results obtained by Job’s method and the equilibrium shift method, the stoichiometries of the complexes were determined to be 1:1. The effect of foreign ions on V(V) extraction by compound 2 has been determined as well. 相似文献