One and two photon fluorescent complexes of rhenium and their technetium analogues
作者:Stanley Botchway、Jonathan R. Dilworth、Maria Salichou
DOI:10.1039/b927506a
日期:——
The synthesis of rhenium and 99m-technetium complexes of dipyrazolemethanecarboxylates directly from the tetroxometallates is reported together with a ‘one pot’ synthesis of mixed ligand M(V) complexes. The rhenium complexes in all three oxidation states show strong fluorescence when the pyrazole groups have aromatic substituents with emission around 330 nm with both one and two photon excitation. The emission lifetimes of the complexes and free ligands differ considerably.
Syntheses and structures of pyrazolylmethane complexes of rhenium(iii), (iv) and (v)
作者:Andrew R. Cowley、Jonathan R. Dilworth、Maria Salichou
DOI:10.1039/b617549j
日期:——
Reaction of [ReOCl3(PPh3)(2)] with HCpz(3) (pz = pyrazole) in dichloromethane leads to the formation of a new Re(iv) complex [ReCl3(HCpz3)]X (X=Cl, [ReO4]) with loss of the rhenium-oxo group. We also report a convenient, high-yield synthetic route to complexes of the type [ReOXn(L)](3-n)+ (X=Cl, Br, n = 2, 3) by the reaction of bis(pyrazolylmethane) and bis(pyrazolylacetate) ligands with [ReOCl3(PPh3)2]
Synthesis of new bulky bis(pyrazolyl)methane carboxylate (heteroscorpionate) ligands and their complexes with iron, manganese and nickel
作者:Michael W. Jones、Jack E. Baldwin、Andrew R. Cowley、Jonathan R. Dilworth、Alexei Karpov、Nicolas Smiljanic、Amber L. Thompson、Robert M. Adlington
DOI:10.1039/c2dt31859h
日期:——
Three new sterically demanding ligands based on the bispyrazolylacetic acid motif have been prepared and complexes with Fe(II), Fe(III), Ni(II) and Mn(II) have been synthesised and characterised. Single crystal X-ray structures are included for two of the ligands in the protonated form and ten other complexes. Additionally, a new general route to amide derivatives has been established, a range of amide derivatives synthesised and their coordination chemistry investigated. Only one metal complex was synthesised from the amide ligands, and was bound via the hydroxylamine groups in preference to the pyrazole and carboxylate donor set.
我们制备了基于双吡唑乙酸基团的三种新的立体要求较高的配体,并合成和表征了与 Fe(II)、Fe(III)、Ni(II) 和 Mn(II) 的配合物。其中包括两种质子化配体和其他十种配合物的单晶 X 射线结构。此外,还建立了一条通向酰胺衍生物的新途径,合成了一系列酰胺衍生物,并研究了它们的配位化学。只有一种金属配合物是由酰胺配体合成的,而且是通过羟胺基团而不是吡唑和羧酸盐供体组结合的。