Anion effects in selective bifunctional metal salt extractants based on aza-thioether macrocycles: co-operative cation–anion binding?
作者:Mark W. Glenny、Alexander J. Blake、Claire Wilson、Martin Schröder
DOI:10.1039/b210391p
日期:——
range of metal–salt binding interactions. Anion binding occurs via a switching mechanism whereby co-ordination of a metal cation to L1 breaks internal hydrogen-bonding to allow anions to bind to the inner urea hydrogen site on the attached pendant arm. No anion binding occurs in the absence of a bound metal ion. Crystal structures of two complexes L·AgNO3 confirm this feature [for N–H⋯ONO2, N⋯O = 2.866(5)–2
卤化银盐的结合(X = NO 3 -,BF 4 -和C10 4 -)[15] ANES 2 ON 2 - (CH 2 CONHCONH-吨丁基)2 (大号1)被评定由1 H NMR光谱。1 H NMR滴定法L 1与AgX的相关性研究配体根据金属-盐结合相互作用的范围来解释。阴离子结合是通过一种转换机制发生的,从而使金属配位阳离子到大号1个场所内部氢键,以允许阴离子结合于连接的侧臂内氢脲站点。在没有结合的金属离子的情况下,没有发生阴离子结合。两种配合物L ·AgNO 3的晶体结构证实了这一特征[对于N–H⋯ONO 2,L 1 ·AgNO 3中的N⋯O = 2.866(5)–2.940(5)Å ],但也显示出螯合物与酰胺酰基脲侧链对Ag I的O-供体处于固态。用AgX盐和L 1进行的两相金属萃取研究证实了阴离子起着重要的作用,尽管最终金属络合物在有机相中的溶解度可能是主要因素。相关范围酰胺 替代的
Synthesis of Diazathia 15- and 18-Crown Ethers and Their Transport Properties for Metal Cations
A new series of the diazathia 15- and 18-crown ethers were prepared by high pressure SNAr reaction, in which various heteroaromatics were directly connected to their nitrogens. Liquid membrane transport studies demonstrated that the diazathia 18-crown ethers having benzothiazole, benzoxazole,and pyridine rings on their sidearms exhibited Hg2+ and Ag+ ion selectivity.
Ligands macrocycliques pentadendates
作者:Daniel Pelissard、Remy Louis
DOI:10.1016/s0040-4039(01)94373-4
日期:1972.1
Design and synthesis of heteroditopic aza-thioether macrocycles for metal extraction
作者:Mark W. Glenny、Marie Lacombe、Jason B. Love、Alexander J. Blake、Leonard F. Lindoy、Robert C. Luckay、Karsten Gloe、Bianca Antonioli、Claire Wilson、Martin Schröder
DOI:10.1039/b609180f
日期:——
hydrogen-bond formation resulting in interaction of the amide proton with the macrocyclic nitrogen centres. A single crystal X-ray structure of [Ag([12]aneS3N–CH2CONH–tBu)(NO3)] confirms binding of Ag(I) to the macrocyclic moiety with additional hydrogen-bonding [N–H⋯O 2.901(3) Å] between the macrocyclic pendant arm amide unit and the nitrate anion demonstrating that in the solid-state these ligands can