Synthesis and characterization of manganese(I) and rhenium(I) based M2L2- and M2(µ-Br)2L-type diethyleneglycol decorated ester functionalized metallacycles
摘要:
M2L2-type metallacycles [M(CO)(3)Br(mu-pcadgd)](2) (1, M = Mn; 2, M = Re) were prepared by the reaction of equimolar amounts of M(CO)(5)Br and 4-pyridinecarboxylic acid diethyleneglycol diester (L = pcadgd). On the other hand, polyether spacer containing bromido-bridged M-2(mu-Br)(2)L-type metallacycles [M-2(CO)(6)(mu-Br)(2)(mu-pcadgd)] (3, M = Mn; 4, M = Re) were obtained by treating two equivalents of M(CO)(5)Br with one equivalent of 4-pyridinecarboxylic acid diethyleneglycol diester (pcadgd). Compounds 1-4 were characterized using elemental analyses, NMR, IR and UV-Vis absorption spectroscopic techniques. Formation of 1-4 was ascertained by ESI-mass spectrometry, while the structural elucidation of bromido-bridged compound 3 was carried out by single-crystal X-ray diffraction analysis. This research work comprises the first Mn(I)-based polyether spacer containing dinuclear metallacycles with/without a bromido-bridge, along with their Re counterparts. The metallacycles 1-4 were obtained in a single-step directly from M(CO)(5)Br via a two precursor self-assembly. (C) 2017 Elsevier B.V. All rights reserved.
作者:Buthanapalli Ramakrishna、Chowan Ashok Kumar、Tevendriya J. Logesh、Bala. Manimaran
DOI:10.1016/j.jorganchem.2016.11.030
日期:2017.1
Oxidative addition of oxamide ligands (H2L = N,N′-diphenyloxamide, and N,N′-dibenzyloxamide) to rhenium carbonyl (Re2(CO)10) in the presence of flexible ditopic pyridyl ligands having polyether spacer (L′ = 4-pyridinecarboxylic acid diethylene glycol diester and 4-pyridinecarboxylic acid tetraethylene glycol diester) afforded dirhenium(I) metallacrown ethers of general formula [(CO)3Re(μ-L)(μ-L′)Re(CO)3]
Concomitant crystallization of two polymorphs—a ring and a helix: concentration effect on supramolecular isomerism
作者:Katharina M. Fromm、Jorge L. Sagué Doimeadios、Adeline Y. Robin
DOI:10.1039/b506389b
日期:——
For the first time in Ag coordination chemistry, two supramolecular isomers, a ring and a helix, are isolated from the same mother liquor as a result of concentration effects.
在银配位化学中,首次通过浓度效应从同一母液中分离出两种超分子异构体,即环和螺旋。
Self-assembly of manganese(<scp>i</scp>) based thiolato bridged dinuclear metallacycles: synthesis, characterization, cytotoxicity evaluation and CO-releasing studies
Manganese(i) based thiolato bridged dinuclear metallacycles were assessed as anticancer agents along with myoglobin assay for CO-releasing studies.
基于硫代桥联的二核锰配合物被评估为抗癌药物,并与肌红蛋白测定一起用于CO释放研究。
ANTIMICROBIAL SILVER COMPLEX COATED SURFACE
申请人:MEDACTA INTERNATIONAL SA
公开号:US20170239394A1
公开(公告)日:2017-08-24
The present invention relates to orthopedic implants, in particular to hip and knee prostheses, substantially involving metallic substrates with an antibacterial surface treatment consisting of silver immobilized in an organic linker and ligand via a multistep solution dipping and drying process. This treatment while being biocompatible is designed to inhibit bacterial growth and therefore combat periprosthetic infection which is one of the main causes of revision in hip and knee arthroplasty.
The present invention relates to orthopedic implants, in particular to hip and knee prostheses, substantially involving metallic substrates with an antibacterial surface treatment consisting of silver immobilized in an organic linker and ligand via a multistep solution dipping and drying process. This treatment while being biocompatible is designed to inhibit bacterial growth and therefore combat periprosthetic infection which is one of the main causes of revision in hip and knee arthroplasty.