New Ru Complexes Containing the N-Tridentate bpea and Phosphine Ligands: Consequences of Meridional vs Facial Geometry
摘要:
The synthesis and isolation of the complex cis, fac-[(RuCl2)-Cl-II(bpea)(PPh3)] [3; bpea = N,N-bis(2-pyridylmethyl)ethylamine] and three geometrical isomers of the complex [(RuCl)-Cl-II(bpea)(dppe)](BF4) [4; dppe = (1,2-diphenylphosphino)ethane], trans, fac(4a), cis, fac(4b), and mer(down)(4c), have been described (see Chart 1 for a drawing of their structures). These complexes have been characterized through analytical, spectroscopic (IR, UV/vis, and 1D and 2D NMR), and electrochemical (cyclic voltammetry) techniques. In addition, complexes 3, 4a, and 4b have been further characterized in the solid state through monocrystal X-ray diffraction analysis. The molecular and electronic structures of isomers 4a, 4b, 4c, and 4d (the mer(up) isomer) have also been studied by means of density functional theory (DFT) calculations. Furthermore, their low-energy electronic transitions have been simulated using time-dependent DFT approaches, which have allowed unraveling of their metal-to-ligand charge-transfer nature. Complexes 3 and 4a-c are capable of catalyzing H-transfer types of reactions between alcohols and aromatic ketones such as acetophenone and 2,2-dimethylpropiophenone (DP). A strong influence of the facial versus meridional geometry in the bpea ligand coordination mode is observed for these catalytic reactions, with the meridional isomer being much more active than the facial one. The meridional isomer is even capable of carrying out the H-transfer reaction of bulky substrates such as DP at room temperature.
Novel radiopharmaceuticals that are useful in diagnostic imaging and therapeutic treatment of disease characterized by over expression of CA-IX comprise a complex that contains a sulfonamide moiety which is capable of binding the active catalytic site of CA-IX, and a radionuclide adapted for radioimaging and/or radiotherapy:
Triply halogeno and methoxido-bridged dinuclearrutheniumcomplexes bearing a tridentate ancillary ligand, alkylbis(2-pyridylmethyl)amine (alkyl, ethyl and benzyl), in the Ru(II)–Ru(III) mixed-valence state were synthesized by reduction reactions of the trichloridoruthenium(III) complex, fac-[RuIIICl3(ebpma)], followed by chlorido-substitution and oxidation reactions in air. The conversion of the bridging
通过还原反应合成了Ru(II)-Ru(III)混合价态的带有三齿辅助配体烷基双(2-吡啶基甲基)胺(烷基,乙基和苄基)的三重卤代和甲氧基桥接的双核钌配合物。三氯钌(III)配合物fac- [Ru III Cl 3(ebpma)],然后在空气中进行氯离子取代和氧化反应。还可以通过还原双核核来实现二钌配合物桥联配体的转化。通过电子自旋共振(ESR),X射线晶体学,电化学测量和紫外可见近红外(NIR)光谱研究了混合价态的电子结构。所有三重桥连配合物的混合价态是稳定的,分类为III类。
LANTHANIDE ION COMPLEXES AND IMAGING METHOD
申请人:Pang Yi
公开号:US20160333028A1
公开(公告)日:2016-11-17
A lanthanide complex, method of forming and method of using the lanthanide complex as a near-infrared luminescent material are described. The complex includes at least one lanthanide ion and at least one polydentate ligand derived from a molecule having the general formula of Structure 2:
where: E represents a heteroatom or heteroatom-containing group and R
1
-R
8
are independently selected from H, —OH, —NH
2
, —SO
3
H, —CO
2
H, halides, optionally substituted organic groups; and conjugated linking groups which link two of the polydentate ligands of Structure 2 together.
A Dinuclear Manganese(II) Complex with the {Mn<sub>2</sub>(μ-O<sub>2</sub>CCH<sub>3</sub>)<sub>3</sub>}<sup>+</sup> Core: Synthesis, Structure, Characterization, Electroinduced Transformation, and Catalase-like Activity
Reactions of Mn(II)(PF(6))(2) and Mn(II)(O(2)CCH(3))(2).4H(2)O with the tridentate facially capping ligand N,N-bis(2-pyridylmethyl)ethylamine (bpea) in ethanol solutions afforded the mononuclear [Mn(II)(bpea)](PF(6))(2) (1) and the new binuclear [Mn(2)(II,II)(mu-O(2)CCH(3))(3)(bpea)(2)](PF(6)) (2) manganese(II) compounds, respectively. Both 1 and 2 were characterized by X-ray crystallographic studies
all complexes were extensively incorporated into the HeLa cells over a 24 h period, and the DQA complexes showed the highest uptake of all the complexes in the series. However, in comparison to the corresponding Re complexes without the pendantcarbohydrate functions (prepared with the related ligands LDPA, LDQA, and LNPG), only the NPG complexes exhibited carbohydrate enhanced cellularuptake. Considering
已经制备了 12 种 [ReIL(CO)3]n+ 与各种碳水化合物悬垂配体 L 的复合物,并研究了它们对 HeLa S3 细胞的吸收。配体库包括: (i) 葡萄糖/半乳糖作为碳水化合物基团;(ii)双(2-吡啶基甲基)胺(DPA)、双(2-喹啉甲基)胺(DQA)或N-(2-吡啶基甲基)甘氨酸(NPG)作为金属结合组分;(iii) 乙烯链作为金属结合位点和 O/C-糖苷之间的接头。微波诱导等离子体质谱 (MIP-MS) 测量表明,所有复合物在 24 小时内都广泛地结合到 HeLa 细胞中,并且 DQA 复合物显示出该系列中所有复合物的最高吸收。然而,与没有悬垂碳水化合物功能的相应 Re 复合物相比(用相关配体 LDPA、LDQA、和 LNPG),只有 NPG 复合物表现出碳水化合物增强的细胞摄取。考虑到它们的水溶性和细胞吸收特性,含有 O-糖苷基团(L1 和 L'1)的 NPG 复合物是增强