Saccharified Uranyl Ions: Self‐Assembly of UO
<sub>2</sub>
<sup>2+</sup>
into Trinuclear Anionic Complexes by the Coordination of Glucosamine‐Derived Schiff Bases
作者:Gerrit Schaper、Marco Wenzel、Felix Hennersdorf、Leonard F. Lindoy、Jan J. Weigand
DOI:10.1002/chem.202100546
日期:2021.6.10
ene) glucosamine (H2L2) in a similar procedure with Cs+ gave the corresponding complex [Cs(18-crown-6)]2[(UO2)3(μ3-O)(L2)3 ([Cs(18-crown-6)]22). From X-ray investigations, the [(UO2)3O(Ln)3]2− anion (n=1, 2) in each complex is a discrete trinuclear uranyl species that coordinates to the alkali metal ion via three uranyl oxygen atoms. The coordination behavior of H2L1 and H2L2 towards UO22+ was investigated
Mixed-metal phosphinito complexes of platinum(<scp>II</scp>) and palladium(<scp>II</scp>) with lanthanide and actinide elements. The single-crystal X-ray structure of [UO<sub>2</sub>(OH<sub>2</sub>){(OPPh<sub>2</sub>)<sub>2</sub>Pd(S<sub>2</sub>CNEt<sub>2</sub>)}<sub>2</sub>]
作者:Paul M. Veitch、James R. Allan、Alexander J. Blake、Martin Schröder
DOI:10.1039/dt9870002853
日期:——
The single-crystal X-ray structure of the complex shows a distorted pentagonal bipyramidal uranium(VI) ion lying on a crystallographic two-fold axis with the oxo ligands of the trans-UO2 moiety, UO = 1.774(7)Å, occupying apical sites. The structure confirms co-ordination of two [(OPPh2)2Pd(S2CNEt2)]– moieties around UVI. The four phosphinito ligands bridge UVI and the two PdII centres with U–O = 2
膦腈桥联的杂核络合物[M'(OPPh 2)2 M(S 2 CNR 2)} n ]的合成(M'= Ce III,Eu III,Sm III或Nd III,n = 3; M ′= Th IV,n = 4)和[UO 2(OH 2)(OPPh 2)2 M(S 2 CNR 2)} 2 ]通过[M(S 2 CNR 2)(Ph 2 PO)2 H}](M = Pd或Pt,R = Et或Pri)描述了镧系元素和act系元素的盐。[UO 2(OH 2)(OPPh 2) 2 Pd(S 2 CNEt 2)} 2 ]在单斜空间群C 2 / c中结晶,其中a = 26.285(8), b = 13.870(8), c = 21.068(6)Å,β= 90.042(8)°, Z =4。配合物的单晶X射线结构显示扭曲的五边形双锥体铀离子( VI)位于晶体学的两倍轴上,且反式-UO 2的氧代配体,U O = 1.774(7)Å,占据根尖。该结构证实了U
A series of Nano-sized metal ion – thiouracil complexes, tem, spectral, γ- irradiation, molecular modelingand biological studies
作者:Khlood Abou- Melha
DOI:10.13005/ojc/310406
日期:2015.12.30
VO(II), Ni(II), Pd(II), Pt(IV) and UO2(II) complexes were prepared using H5L ligand (C21H15N9S2O3S2). All the prepared complexes are deliberately discussed using different tools(IR, Uv-Vis, 1HNMR, ESR 13CNMR, TGA, TEM, XRD).The octadentate is the main mod of ligand donation, as a neural or trinegativetowards the metal ion. This is verified using molecular modeling as a theoretical tool assert on the stereo structure of the ligand proposed leads to the donation mod. The structural formulas of the complexes were varied in between four to six coordination no. except the VO(II) complex is five. Most investigated complexes are thermally unstable due to the presence of crystal water occluded the coordinating crystal. All the spin Hamiltonian parameters as well as molecular orbital parameters were calculated for VO(II) complex. XRD patterns were investigated to calculate the particle size of each compound and display their nanosized by distinguish values. TEM scenes are also supporting the XRD data. Finally the biological activities were carried out on different bacteria as well as on fungi. The toxic effect was observed especially with Gram positive bacterium (Bacillus subtilis). Also, the effect on DNA degradation was recorded and display a complete degradation by the use of Pt(IV) and Pd(II) complexes. Whereas, a partial degradation was observed with Ni(II) and UO2(II) complexes. But, there is no effect observed with the use of ligand and VO(II) complex.
Provided herein is a method for enzymatically triggered assembly of polymeric nanostructures for detection of cancer-associated enzymes in vivo. By detecting enzymatic signals associated with disease, one can sensitively determine the site, and extent of disease within a patient.
X-Ray crystallographic and computational study on uranyl–salophen complexes bearing nitro groups
作者:Arto Valkonen、Giuseppe M. Lombardo、Kari Rissanen、Francesco Punzo、Massimo Cametti
DOI:10.1039/c6dt04773d
日期:——
In the solid state, salophen–UO2 complexes bearing one, two, or three NO2 groups lack the pronounced ligand curvature that represents a structural hallmark for this class of compounds. A detailed structural study based on single-crystal X-raycrystallography and computational methods, comprising moleculardynamics, gas-phase Hartree Fock, and DFT calculations, was carried out to investigate the coordination