稀土离子光谱探针的研究:EuS4N配合物在低温下的可逆相变

从配合物EuS4N低温荧光光谱的研究 ,可得到温度变化时配合物结构变化多方面的信息。从光谱转变的温度可知道结构变化对应的温度在约 16 0K ,对 5D0 → 7F0 跃迁谱峰的分析可推知结构变化前后Eu3 +配位结构的情况。从发光强度与温度变化的速度、方向的关系可推测结构变化时的热效应 ,并通过对样品温度的直接测量进行了验证。对配合物发生这种结构变化的可能原因进行了分析。研究表明 ,Eu3 +离子光谱探针在低温晶体结构的研究中具有某些特殊的优点 ,可作为单晶X

新的^(99)Tc^mN配合物的制备及其生物分布研究

为了寻找新的９９Ｔｃｍ Ｎ 标记的心肌显像剂，合成了两种含有酯基的ＮＳ配体半胱氨酸甲酯（ＣＹＭ）和半胱氨酸丙酯（ＣＹＰ）。以ＳｎＣｌ２ 为还原剂，Ｈ２ＮＮＨ－ （Ｃ＝ Ｓ）－ ＳＣＨ３ 为Ｎ３－ 给予体，通过交换反应制备了放化纯大于９０％ 的９９Ｔｃｍ Ｎ（ＣＹＭ）２ 和９９Ｔｃｍ Ｎ（ＣＹＰ）２。探讨了ｐＨ值和反应时间对９９Ｔｃｍ Ｎ配合物放化纯的影响，并对其在小鼠体内的生物分布进行了研究。结果表明，９９Ｔｃｍ Ｎ（ＣＹＭ）２ 和９９Ｔｃｍ Ｎ（ＣＹＰ）２在心肌中具有较高的初始摄取和快速的血清除，血半清除期小于１５ｍ ｉｎ。但是，心肌滞留不理想，心肌与其它组织的放射性比值较低。本工作对于设计新的９９Ｔｃｍ Ｎ心肌显像剂具有参考价值。

新型Schiff碱钛配合物[N,N]TiCl_3的合成、负载及催化乙烯聚合

用吡咯甲醛与取代苯胺形成的Schiff碱和TiCl4反应生成配合物[N,N]TiCl3。研究了均相条件下和在MgCl2上负载对乙烯聚合和乙烯-己烯共聚的催化活性。对于Schiff碱钛配合物的MgCl2负载体系,其催化活性依赖于铝钛比的变化,在以MAO作助催化剂,n(Al)/n(Ti)=1000时,催化活性可达8 09×106g/(mol·h),较均相条件下提高了两个数量级。研究表明,用MgCl2做载体不仅降低了MAO的用量,而且可以用烷基铝代替MAO。该催化体系具有良好的共聚能力,能催化乙烯-己烯共聚,其活性高达1 08×107g/(mol·h)。

2-环己氧羰基乙基三氯化锡及其N,N-二乙基二硫代氨基甲酸配合物的合成与结构表征(英文)

合成了2-环己氧羰基乙基三氯化锡及其N,N-二乙基二硫代氨基甲酸配合物,通过元素分析、IR、1H和13CNMR及X-射线单晶衍射对其结构进行了表征。化合物2属于单斜晶系,C2/c空间群,晶胞参数为a=1.90867(17)nm,b=0.67885(8)nm,c=3.1902(3)nm,β=97.311(7)°,Z=8,μ=1.715mm-1,R=0.0334。中心锡原子为含有分子内羰基氧原子和N,N-二乙基二硫代氨基甲酸配体的两个硫原子配位的畸变八面体构型。波谱数据表明化合物1和2存在着分子内羰基氧原子对锡原子的配位,而在化合物3和4中这一配位则被两个或三个双齿二硫代氨基甲酸配体所替代。化合物2的理论研究表明AM1半经验计算可以成功预测这类有机锡化合物的几何构型。

^(99)Tc^m标记N_3O_3-Schiff碱类配合物的定量构效关系研究

用分子力学、半经验量子化学的ZINDO/1方法对系列99Tcm标记N3O3 Schiff碱类配合物的结构进行了优化,作了电子结构计算。并将这些参数对心肌初始摄取值进行多元线性回归分析,得到了回归方程。利用所得方程对该类配合物的心肌摄取机理进行了讨论,提出了该类配合物的心肌摄取机理可能为被动扩散机理。具有低极性的配合物比较容易通过被动扩散机理进入心肌细胞中,在最大正电荷的影响下"陷落"在线粒体中。

Mn(C2Cl3O2)Cl(C(12)H8N2)2的合成、表征及其纳米晶体参数计算

以Cl3CCOOH、1,10-菲罗啉为配体,以MnCl2·4H2O为金属离子盐,通过溶液蒸发法合成了具有纳米级金属骨架的三元配合物Mn(C2Cl3O2)Cl(C12H8N2)2。通过元素分析、红外光谱、X单晶衍射测得配合物属于单斜晶系,其空间群为P21/c,a=1.8155nm,b=1.0638nm,c=1.4685nm,β=112.9°,z=4,V=2.6110nm3。通过纳米化计算的方法,计算出总晶胞数、总原子数、及表面参数随粒径变化的关系,得出Mn(C2Cl3O2)Cl(C12H8N2)2最佳纳米化尺度为115nm。

Theoretical Studies on Structures and Spectroscopic Properties of Highly Efficient Phosphorescent [Ru（terpy）（phen）X]＋ Complexes

The ground and the lowest-lying triplet excited state geometries, electronic structures, and spectroscopic properties of three mixed-ligand Ru（II） complexes [Ru（terpy）（phen）X]＋ （terpy=2,2＇,6＇,2″-terpyridine, phen=l,10-phenanthroline, and X=-C-=CH （1）, X=Cl （2）, X-CN （3）） were investigated theoretically using the density functional theory method. The ground and excited state geometries have been fully optimized at the B3LYP/LanL2DZ and UB3LYP/LanL2DZ levels, respectively. The absorption and emission spectra of the com- plexes in CHaCN solutions were calculated by time-dependent density functional theory with the PCM solvent model. The calculated bond lengths of Ru-C, Ru-N, and Ru-Cl in the ground state agree well with the corresponding experimental results. The highest occupied molecular orbital were dominantly localized on the Ru atom and monodentate X ligand for 1 and 2, Ru atom and terpy ligand for a, while the lowest unoccupied molecular orbital were π＊（terpy） type orbital. Therefore, the lowest-energy absorptions of 1 and 2 at 688 and 631 nln are attributed to a dyz （Ru）＋Tr/p（X）--π＊ （terpy） transition with MLCT/XLCT （metal-to-ligand charge transfer/X ligand to terpy ligand charge transfer） character, whereas that of 3 at 529 nm is related to a dyz （Ru）＋π（terpy）-π＊ （terpy） transition with MLCT and ILCT transition character. The calculated phosphorescence of three complexes at 1011 nm （1）, 913 nm （2）, and 838 nm （3） have similar transition properties to that of the lowest-lying absorption. It is shown that the lowest lying absorptions and emissions transition character of these Ru（II） complexes can be tuned by changing the electron-withdrawing ability of the monodentate ligand.

羰基镍簇Ni（CO）n（n=1～4）的结构和Ni—Co键解离性质的密度泛函理论研究

在密度泛函理论框架下，应用不同泛函计算了配合物Ni（CO）n（tn=41～4）的平衡几何构型和振动频率．考察了泛函和基组重叠误差对预测Ni—CO键解离能的影响．计算结果表明，用杂化泛函能得到与实验一致的优化几何构型和较合理的振动频率．对Ni（CO）n（n=2～4）体系，用“纯”泛函，如BP86和BPW91，可得到与CCSD（T）更符合、并与实验值接近的解离能．当解离产物出现单个金属原子或离子（如金属羰基配合物的完全解离）时，BSSE校正项的计算中应保持金属部分的电子结构一致．只有考虑配体基组和不考虑配体基组两种情况下金属的电子构型与配合物中金属的构型一致时，才能得到合理的BSSE校正，从而预测合弹的懈离能．

The Paramagnetic 2D Chiral-porous Polymer of L-Phenylalanine and Manganese

Mn(L-Phe)2稨2O]n (Phe=phenylalanine) with a single stranded coordination poly- mer has been synthesized by self-assembly of manganese salt and phenylalanine and characterized by X-ray single-crystal diffraction method. The complex crystallizes in the orthorhombic, space group P212121 with a = 6.0911(1), b = 10.3642(1), c = 30.4321(7) ? V = 1921.16(6) ?, Z = 4, Dc = 1.387 g/cm3, C18H22N2O5Mn, Mr = 401.32, F(000) = 836 and m(MoKa) = 0.717 mm-1. The final R = 0.0614 and wR = 0.1412 for 2291 observed reflections with I > 2s(I). The magnetic behavior study shows that there exist super-exchange antiferromagnetic interactions between the magnetic centers through the effective exchange pathway of the carboxylate group.

Syntheses and Structures of Two Mixed Ligands Lanthanide Complexes with N,N'-Substituted Adipamide

Crystal structures of neodymium (III) and dysprosium (III) nitrate complexes with the new ligand N, N’-dimethyl-N, N’-diphenyladipamide (mpaa) has been determined. Both complexes are triclinic with space group Pī, formula [C22H30N5NdO12S]2 1 [C42H54N7DyO14S 2] Mr = 1465.62[1075.48], a = 8.541(1)[9.711(2)], b = 11.915(1)[16.017(3)], c = 15.906(1) [16.686(3)] ?, α =107.22(1)[109.600(1)], β = 98.12(1)[92.50(1)], γ = 99.78(1) [96.22(1)]°, V = 1491.8(2)[2421.7(8)] ?3, Dc = 1.631[1.475] g·cm-3, Z = 1[2], F(000) = 738[1098], μ=0.71073cm-1; R=0.0261[0.0364], wR=0.0611[0.0857] reflections with I>2σ(I). Complex (1) is dinuclear, in which two Nd(III) ions are double-bridged by two mpaa ligands. And Dy(mpaa)2(dmso)(NO3)3 (2) (dmso= dimethylsulfoxide) is a mononuclear complex, in which one of the two C=O groups in MPAA is uncoordinated. In the two above complexes, each Ln(III) ion is nine-coordinated including three bidenate nitrates, one dmso molecule and two carbonyl oxygens from two different mpaa ligands. Neutral monodentate dmso enters the coordination sphere to meet the geometric requirements. When the number of methylene between O=C…C=O in diamides of the type (R1R2NCO)2(CH2)n was increased, the ligand prefers to act as a bridging reagent rather than a chelate.

Synthesis and Crystal Structure of Cadmium(Ⅱ) Complex [Cd(H_2O)(CH_3OC_6H_4COO)_2]_n

At room temperature, the reaction of Cd(NO3)24H2O and anisic acid in an ethanol solution affords the cadmium (Ⅱ) complex [Cd(H2O)(CH3OC6H4COO)2]n. The crystal is of monoclinic, empirical formula C16H16O7Cd, Mr = 432.69, space group C2/c with parameters: a = 34.211(2), b = 6.030(2), c = 7.611(3) ? = 95.619(5)? V = 1562.5(9) ?, Z = 4, Dc = 1.831 g/cm3, = 1.434 mm-1, F(000) = 856, R = 0.0215 and wR = 0.0456. 1121 reflections with I ≥ 2s(I) were considered to be observed. Each cadmium atom is seven-coordinate in a distorted pentagonal bipyramidal geometry. The Cd (Ⅱ) center is doubly bridged with the neighboring Cd centers by anisate ligands to form a four-membered ring with a repeating unit of CdOCdO-. The extended structure and hydrogen-bonding patterns displayed in the complex were studied.

Synthesis and Crystal Structure of Bridging Complex [Cu_2(bipy)_2·OAc·Cl·OH]·TsTausH·3H_2O

The title complex [Cu2(bipy)2OAcClOH]TsTausH3H2O(C31H37Cl- Cu2N5O11S2) has been synthesized by the reaction of 2,2?bipyridine(bipy), N-P-tolysulfony taurine (TsTausH) and copper acetate in water-ethanol solution, and its crystal structure was determined by X-ray diffraction method. The crystal belongs to triclinic, space group P with a = 0.74485(14), b = 1.6094(3), c = 1.7472(3) nm, a = 114.662(4), b = 99.997(4), g = 93.218(4), V = 1.8551(6) nm3, Mr = 882.31, Z = 2, Dc = 1.580 g/cm3, m = 1.395 mm-1 and F(000) = 906. The complex is a binuclear copper compound, and the two copper ions nearly have the same coordination environment. There exists MM bond in the complex. The distance of Cu(1)Cu(2) is 0.29747(7) nm. The two ions form two distorted octahedral geometries.

Synthesis and Crystal Structure of (C_6N_3H_(18))_2Ti_4O_4(C_2O_4)_7·4H_2O

The title compound (C6N3H18)2Ti4O4(C2O4)74H2O 1 (C13H22N3O18Ti2, Mr = 604.14) was synthesized by the reaction of Ti(SO4)2, H2C2O42H2O and N-(2-ammonioethyl)- piperazinium (AEPP) in aqueous solution. The single-crystal X-ray analysis has revealed that 1 crystallizes in the triclinic system, space group Pi with a = 9.1437(6), b = 11.4991(10), c = 11.6975(8) ? a = 96.2915(18), ?= 107.998(3), ? = 104.276(4), V = 1110.35(14) ?, Z = 2, Dc = 1.807 g/cm3, F(000) = 618, ?= 0.815 mm-1, the final R = 0.0463 and wR = 0.1264 for 3718 observed reflections with I > 2s(I). X-ray crystal-structure analysis suggests that compound 1 consists of [Ti4O4(C2O4)7]6- anion and two protonated N-(2-ammonioethyl)piperazinium cations. The anions are linked into an infinite chain through Ti4O4(C2O4)8 by sharing the oxalates as bridging ligands.

Synthesis and Crystal Structure of 1-D Chain Copper(Ⅱ) Complex: [Cu(L)Cl_2]_n (L=2,5-Di-2-pyridyl-1,3,4-oxodiazole)

The title complex, [Cu(L)Cl2]n (L = 2,5-di-2-pyridyl-1,3,4-oxodiazole) 1, has been obtained from the reaction of 3,6-di-2-pyridyl-1,2,4,5-tetrazine (bptz) and CuCl2?H2O in a mixture solvent of CH3CN and CH2Cl2 (L is generated from the metal-assisted hydrolysis reaction of bptz) and structurally characterized. It crystallizes in space group C2/c of monoclinic system with cell parameters: a = 9.812(2), b = 12.679(3), c = 11.111(2) ? b = 103.92(3)? V = 1341.6(5) 3, Z = 4, Dc = 1.776 g/cm3, Mr = 358.66, F(000) = 716, ?= 2.024 mm1 and S = 1.004. The final R = 0.0346 and wR = 0.0938 for 1011 observed reflections with I > 2(I). The Cu(Ⅱ) ion is six-coordinated by four N atoms of two L ligands and two Cl ions in a distorted octahedral geometry. The ligand L acts as a bis-bidentate ligand to bridge the Cu(Ⅱ) ions, resulting in an infinite chain structure.

Synthesis and Crystal Structure of a New Hexadentate Ligand N,N'-Bis(di(2-pyridyl)methyl)ethylenediamine

The reaction of di(2-pyridyl)ketone with ethylenediamine produced hexadentate Schiff base 1 which can be reduced to form a new ligand N,N-bis(di(2-pyridyl)-methyl)ethylene- diamine (BDPM) in ethanol solution. The two compounds were characterized by elemental analyses and spectroscopic methods. Their structures were determined by X-ray diffraction study. Crystal data for 1: C24H20N6, Mr = 392.5, monoclinic, P21/c, a = 13.871(3), b = 13.510(2), c = 12.153(2) ? b = 112.97(2)? Z = 4, V = 2094.1(6) ?, Dc = 1.245 g/cm3, m(MoKa) = 0.078 mm-1, F(000) = 824, the final R = 0.0545 and wR = 0.0557 for 2048 observed reflections (I > 2s(I)); for BDPM: C24H24N6, Mr = 396.49, monoclinic, C2/c, a = 21.411(3), b = 8.053(1), c = 11.868(1) ? b = 92.63(1)? Z = 4, V = 2044.2(4) 3, Dc = 1.288 g/cm3, m(MoKa) = 0.080 mm-1, F(000) = 840, the final R = 0.0401 and wR = 0.0939 for 1673 observed reflections (I > 2s(I)).

Synthesis and Crystal Structure of Pd(ptac-C,N)(acac-O,O)

A stable organometallic Pd (Ⅱ) compound Pd(ptac-C,N)(acac-O,O) (Hacac = acetyl acetone, Hptac = 3-(2-pyridinethioxy)-acac, formula: C15H17NO4SPd, Mr = 413.76) 1 has been synthesized and its crystal structure was determined by X-ray crystallography. The crystal is of monoclinic with space group C2/c, a = 17.9342(3), b = 17.7791(4), c = 13.1800(1) ? b = 128.400(1), V = 3293.5(1) 3, Z = 8, Dc = 1.669 g/cm3, F(000) = 1664, m = 1.269 mm-1, R = 0.0261 and wR = 0.0710 for 2653 observed reflections (I > 2s(I)). There exist two Pd rings in the title compound, C(14)O(4)PdO(3)C(12)C(13) and C(1)NPdC(8)S, with the palladium atom taking a square-planar coordination. Two oxygen atoms from the acetyl acetone ligand (PdO, 1.991(2) and 2.036(2) ), one N atom (PdN 2.019 ? and the g-carbon atom (PdC 2.067(3) ? from the ptac ligand are coordinated to Pd.

Synthesis and Crystal Structure of Mo(CO)_4(NNP) (NNP=2-(N-Cyclohexyl-N-diphenylphosphinomethyl)aminopyridine)

The crystal structure of the title complex, Mo(CO)4(NNP), (NNP=2-(N-cyclohexyl- N-diphenylphosphinomethyl)aminopyridine) has been determined, and its crystallographic data are as follows: triclinic, space group P , a = 9.135(1), b = 9.772(1), c = 17.000(2) , a = 76.377(2), b = 78.333(2), g = 67.243(2)? Mr = 582.44, V = 1349.7(3) 3, Z = 2, Dc = 1.433 g/cm3, m(MoKa) = 0.581 mm-1 and F(000) = 596. A total of 5614 reflections were collected in the range of 2.30< q < 25.03? of which 4721 were independent (Rint = 0.0176) and 4159 observed reflections (I ≥ 2s(I)) were used in the refinement. R = 0.0326 and wR = 0.0867. The Mo centre is six-coordinated by four carbonyls (MoC 1.938(4), 2.003(4), 2.019(4), 2.035(4) ) and P, N atoms from the ligand (MoP 2.4812(8), MoN 2.349(3) ?. The coordination geometry of the complex can be described as an octahedron.

Synthesis and Crystal Structure of Bis-{N-[2-(6-ethylpyridyl)]-salicylideneiminato} Cobalt(Ⅱ)

The title complex 1, C28H26CoN4O2, crystallizes in the triclinic system, space group P with a = 9.506(3), b = 9.506(3), c = 14.837(5) ? a = 106.397(5), b = 106.012(5), g = 91.889(6), V = 1217.7(7) 3, Z = 2, Dc =1.390 g/cm3, Mr = 509.46, F(000) = 530, m(MoKa) = 0.738 mm-1, the final R = 0.0359 and wR = 0.0951 for 4275 observed reflections with I > 2s(I). The complex adopts a distorted tetrahedral coordination sphere around the cobalt atom.

[(n-C_4H_9)_3SnO_2C(CH_2)_2CO_2Sn(C_4H_9-n)_3]: A Novel Three-dimensional Framework Structure of Organotin Complex

The bis(tributyltin) ester of succinic acid was synthesized by the reaction of disodium salt of succinic acid with tributyltin chloride in a molar ratio of 1:2. The crystal structure was determined by X-ray single-crystal diffraction. It belongs to orthorhombic with space group Pccn, a = 20.949(3), b = 17.470(3), c = 20.345(3) Angstrom, V = 7446(2) Angstrom(3), Z = 8, D-c = 1.242 g/cm(3), mu = 1.365 mm(-1), F(000) = 2864, R = 0.0544 and wR = 0.1417. The tin atom is of five-coordination in a trigonal bipyramidal structure by bridging two carboxylate groups in different directions and the resulting structure which contains straight twist large ring channels along the axes of a, b and c is a three-dimensional framework polymer containing two different tin atoms.