Anion Binding in Water Drives Structural Adaptation in an Azaphosphatrane-Functionalized Fe<sup>II</sup><sub>4</sub>L<sub>4</sub> Tetrahedron
作者:Dawei Zhang、Tanya K. Ronson、Jesús Mosquera、Alexandre Martinez、Laure Guy、Jonathan R. Nitschke
DOI:10.1021/jacs.7b02950
日期:2017.5.17
the formation of an endohedrally functionalized FeII4L4tetrahedron from azaphosphatrane-based subcomponents. This new water-soluble cage is flexible and able to encapsulate anions with volumes ranging from 35 to 219 Å3 via hydrogen bonding and electrostatic interactions. It structurally adapts in response to the size and shape of the template anions, dynamically adopting a conformation either where
以阴离子为模板的水性自组装导致了由氮杂磷杂环戊二烯基亚组分形成内外官能化的Fe II 4 L 4四面体。这种新的水溶性笼是柔性的并且能够与体积从35到219埃包封阴离子3通过氢键和静电相互作用。它可根据模板阴离子的大小和形状在结构上进行调整,并动态采用构象,其中所有四个氮杂磷杂环丁烷+P–H向量指向内部,否则一个指向外部,其他三个指向内部。两种笼型异构体可以共存于溶液中并相互转化。在来宾移位期间观察到形状记忆现象,因为来宾交换比结构重新配置发生得更快。
Crystal structures of [M(Еn)3](ReO4)2 (M = Ni, Zn)
作者:S. P. Khranenko、E. A. Bykova、A. V. Zadesenets、S. A. Gromilov
DOI:10.1134/s0022476617010139
日期:2017.1
The structures of two isostructural phases of [M(Еn)3](ReO4)2 (M = Ni, Zn; Еn is ethylenediamine) are studied. The crystalstructures belong to the triclinic system, but demonstrate a pseudohexagonal packing motif. It is shown that the product of thermal decomposition of [Zn(Еn)3](ReO4)2 (hydrogen atmosphere, 400 °C) is a homogeneous mixture of nanocrystalline zinc and rhenium powders with coherent
Self‐Assembly of an Anion‐Binding Cryptand for the Selective Encapsulation, Sequestration, and Precipitation of Phosphate from Aqueous Systems
作者:Craig R. Rice、Christopher Slater、Robert A. Faulkner、Robert L. Allan
DOI:10.1002/anie.201805633
日期:2018.10
filtration. Furthermore, the cavity can be tuned to be selective to either phosphate or sulfate anions by variation of the pH. Phosphateanions can be removed from water, even in the presence of other common anions, reducing the concentration from 1000 to <0.1 ppm and recovering approximately 99 % of the phosphateanions.
Solvothermal Approach to the Synthesis of Triangular Re(III) Iodide and Bromide Cluster Complexes
作者:M. A. Mikhailov、T. S. Sukhikh、M. N. Sokolov
DOI:10.1134/s0036023621070081
日期:2021.7
mixture leads to crystallization of the pyridinium salt (PyH)2[Re3Br11(H2O)] · 4H2O (2). In the presence of phosphoric acid, (PyH)2[Re3Br9(PO4H)]·H2O (3) and (Et4N)2[Re3Br9(PO4H)]·2H2O (4) were isolated. The crystalstructures of the compounds 2–4 were determined by single crystalX-ray diffraction. Complexes 1 and 4 were characterized by powder X-ray diffraction. The Re/halogen ratio for compounds 1–4
摘要 在 NaReO 4与浓 HI 在 200°C进行水热反应后,以定量收率形成结晶 Re 3 I 9 ( 1 ) 。Re 3 I 9与HBr 在200°C 的反应导致碘化物配体被溴化物配体完全取代,并保留了簇核。向反应混合物中加入吡啶导致吡啶鎓盐(PyH) 2 [Re 3 Br 11 (H 2 O)]·4H 2 O ( 2 )结晶。在磷酸存在下,(PyH) 2 [Re 3 Br 9 (PO4 H)]·H 2 O ( 3 ) 和(Et 4 N) 2 [Re 3 Br 9 (PO 4 H)]·2H 2 O ( 4 )被分离。的化合物的晶体结构2 - 4通过单晶X射线衍射来确定。配合物1和4用粉末 X 射线衍射表征。对化合物的再/卤素比1 - 4通过能量色散光谱法测定。获得了化合物4的元素分析和31 P NMR光谱数据,并测量了1(远红外范围)和4(近红外范围)的振动光谱。惰性气氛中的热稳定性数据是针对1获得的。
Synthesis and Characterization of Organohydrazino Complexes of Technetium, Rhenium, and Molybdenum with the {M(η<sup>1</sup>-H<i><sub>x</sub></i>NNR)(η<sup>2</sup>-H<i><sub>y</sub></i>NNR)} Core and Their Relationship to Radiolabeled Organohydrazine-Derivatized Chemotactic Peptides with Diagnostic Applications
作者:David J. Rose、Kevin P. Maresca、Terrence Nicholson、Alan Davison、Alun G. Jones、John Babich、Alan Fischman、Wendy Graham、Jeffery R. D. DeBord、Jon Zubieta
DOI:10.1021/ic970352f
日期:1998.6.1
derivatives with a modified Re(eta(1)-NNC(5)H(4)N)(eta(2)-HNNC(5)H(4)N)} core, [Re(C(5)H(4)NS)(2)(NNC(5)H(4)N)(HNNC(5)H(4)N)] (8) and [Re(C(4)H(3)N(2)S)(2)(NNC(5)H(4)N)(HNNC(5)H(4)N)] (9), respectively. Reaction of 6 with pyrimidine-2-thiol led to the isolation of the analogous [Mo(C(4)H(3)N(2)S)(2)(NNC(5)H(4)N)(HNNHC(5)H(4)N)] (11) and the seven-coordinate monohydrazine core complex [Mo(C(4)H(3)N(2)S)(3)(NNC(5)H(4)N)]