Abstract
A bis-bidentate bridging ligand H2L with inequivalent hard and soft binding sites (catecholate and pyrazolyl-pyridine, respectively) reacts with a mixture of Ti(IV) and Zn(II) ions to afford an octanuclear heterometallic Ti4Zn4 cyclic helicate formed from four dinuclear {TiZn(μ-L)2} units connected in a ring via methoxide ions.
Highlights
A bis-bidentate bridging ligand H2L with inequivalent hard and soft binding sites reacts with a mixture of Ti(IV) and Zn(II) ions to afford an octanuclear heterometallic Ti4Zn4 cyclic helicate formed from four dinuclear {TiZn(m-L)2} units connected in a ring via methoxide ions
We can imagine that a greater range of functional behaviour could be achieved if the component parts themselves have some useful function such as redox activity or magnetism for metal ions, or conformational switchability or luminescent excited states for ligands
It is of value to investigate self-assembled systems containing three or more types of component part, as a way of increasing the possibilities for functional behaviour in self-assembled complexes.1a
Summary
A bis-bidentate bridging ligand H2L with inequivalent hard and soft binding sites (catecholate and pyrazolyl-pyridine, respectively) reacts with a mixture of Ti(IV) and Zn(II) ions to afford an octanuclear heterometallic Ti4Zn4 cyclic helicate formed from four dinuclear {TiZn(m-L)2} units connected in a ring via methoxide ions.
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