Ni(II) and Cu(II) Complexes of Pyridyl-Pyrazole Ligands: Syntheses, Crystal Structures and Influence of Metal Ion
摘要:
在水热条件下,通过 HL 和 NaN3 与 NiCl2-6H2O 和 CuCl2-2H2O 反应,制备了配体 3-(2-吡啶基)吡唑-1-基乙酸(HL),并合成了[Ni(L)(N3)] n 和[Cu(L')2(H2O)2] n [HL' = 3-(2-吡啶基)吡唑] 复合物。单晶 X 射线衍射分析表明,[Ni(L)(N3)] n 具有一维无限链结构,并通过π---π弱相互作用进一步形成二维超分子框架;[Cu(L')2(H2O)2] n 通过π---π弱相互作用连接形成一维链,然后通过弱 C-H-O 相互作用形成二维超分子结构。
Two Isostructural Dinuclear Cu<sup>II</sup> and Co<sup>II</sup> Complexes With a Multidentate Bridging Ligand 2-(3-(pyridin-2-yl)-1H-pyrazol-1-yl)acetic Acid
作者:Lei Wang、Guang-Peng Jing、Pei Yang、Jing Chen
DOI:10.1080/15533174.2014.989592
日期:2016.6.2
group of PPA¯, and two nitrogen atoms from the chelating pyridine and pyrazole rings of PPA. The ligand PPA¯ adopts the bridging fashion to facilitate the formation of binuclear coordination motif. For complex 2, the same structure can be obtained as that for 1 except that Cu and Br atoms are replaced by Co and Cl atoms, respectively. Thermal stability of both crystalline materials has been explored.
经由2-(3-(吡啶-2-基)的组装,获得两个同构络合物Cu 2(PPA)2 Br 2(DMF)2(1)和Co 2(PPA)2 Cl 2(DMF)2(2)。 )-1H-吡唑-1-基)乙酸(HPPA)和Cu II / Co II盐。两种络合物都代表相似的双核配位结构,其中包含一个12元金属环,其中不对称单元由一个金属中心(Cu II / Co II),一个Br / Cl'阴离子,一个PPA'配体和一个配位的DMF分子组成。 。在络合物1中,每个铜II离子代表变形的八面体环境,它由一个Br原子,一个DMF分子中的三个氧原子和PPA的螯合羧基,以及PPA的螯合吡啶和吡唑环中的两个氮原子所定义。配体PPA采用桥接方式以促进双核配位基的形成。对于络合物2,除了将Cu和Br原子分别替换为Co和Cl原子之外,可以获得与1相同的结构。已经研究了两种结晶材料的热稳定性。
Enantioselective recognition of a fluorescence-labeled phenylalanine by self-assembled chiral nanostructures
作者:Li Zhang、Qingxian Jin、Kai Lv、Long Qin、Minghua Liu
DOI:10.1039/c5cc00261c
日期:——
Self-assembled chiral nanostructures formed by a pyridylpyrazole-conjugated l-glutamide showed enantioselectivity for a fluorescence labeled chiral amino acid.
由吡啶基吡唑共轭的L-谷氨酰胺形成的手性纳米结构对荧光标记的手性氨基酸具有对映选择性。
An efficient approach to the ammoxidation of alcohols to nitriles and the aerobic oxidation of alcohols to aldehydes in water using Cu(<scp>ii</scp>)/pypzacac complexes as catalysts
作者:Jing-Bo Xie、Jia-Jing Bao、Hong-Xi Li、Da-Wei Tan、Hai-Yan Li、Jian-Ping Lang
DOI:10.1039/c4ra11743c
日期:——
structure. Complex 4 also adopts a dimeric structure in which Cu(mpypzacac)2} and Cu(mpypzacac)} units are interconnected by one μ-κ3:κ1-pypzacac− ligand. Complex 5 contains a 1D chain in which (CuCl) fragments are interlinked by μ-κ3:κ1-pypzacac− ligands. Complexes 1–5 exhibited excellent catalytic performance in the ammoxidation of alcohol to nitrile and the aerobic oxidation of alcohol to aldehyde in
Construction of Isomorphous Coordination Polymers with 2‐(3‐(pyridin‐2‐yl)‐1H‐pyrazol‐1‐yl) acetate Ligand: Structures, Fluorescent Temperature Sensing, and Magnetic Properties
作者:Chenhu Shen、Yibing Xie、Bingshan Kong、Jing‐xin Ma、Jinhui Yang
DOI:10.1002/ejic.202100037
日期:2021.5.7
Co (2), Ni (3) and Cd (4)) have been synthesized under solvothermal conditions by mixed 2‐(3‐(pyridin‐2‐yl)‐1H‐pyrazol‐1‐yl) acetate (PPA) with transition metal ion (Zn2+, Co2+, Ni2+ or Cd2+). Single‐crystal and powder X‐ray diffraction show that the four complexes are isomorphous. Due to different electronic configurations for Zn2+, Co2+, Ni2+, and Cd2+, the solid‐state fluorescence properties of 1
Synthesis, Crystal Structure and Characterization of Cu(II) and Cd(II) Coordination Compounds Based on Ligand 2-(3-(Pyridin-2-yl)-1H-pyrazol-1-yl)acetic Acid
Two novel coordination compounds $[Cu_2(pypya)_3(H_2O)_2]\cdot}Cl\cdot}(H_2O)_5$ (1) and $\[Cd(pypya)(ta)_1/2}]\cdot}H_2O\}_n$ (2) (Hpypya=2-(3-(pyridin-2-yl)-1H-pyrazol-1-yl)acetic acid, $H_2ta$=terephthalic acid) were synthesized and characterized by single X-ray diffraction. Structure determination reveals that complex 1 and complex 2 crystallize in the triclinic system, with the P-1 space group. The asymmetric unit of 1 contains two Cu(II) ions, and their coordination modes are different. These units of complex 1 are linked together via hydrogen bonds and $\pi}-\pi}$ interactions, and the 3D structure of complex 1 was formed. Complex 2, a mononuclear Cd(II) coordination compound, has a 2D structure which was constructed via coordination bonds. TGA and fluorescence spectra analysis of complex 1 and complex 2 have also been studied. In addition, the geometry parameters of complex 1 have been optimized with the B3LYP method of density functional theory (DFT) to explain its coordination behavior. The electronic properties of the complex 1 and ligand Hpypya have been investigated based on the nature bond orbital (NBO) analysis at the B3LYP level of theory. The result verifies that the synergistic effect have occurred in the compound.