Sequential metal ion assembly in cyclic phenylazomethine.


[reaction: see text] Cyclic phenylazomethines with methylene spacers (CPA-M) are obtained by dehydration of diamine with diketone. During the titration of CPA-M 4mer with FeCl(3), we observe two consecutive isosbestic points in the UV-vis spectra. We conclude that complexation occurs in two consecutive steps. Our analysis suggests that the stepwise metal ion assembly is caused by a difference in the basicity of the imine conformers. Metal ion binding first occurs at the Z imines followed by coordination to the E imine. Finally, metal ion assembly in this compound can be controlled electrochemically.

Cite this paper

@article{Higuchi2006SequentialMI, title={Sequential metal ion assembly in cyclic phenylazomethine.}, author={Masayoshi Higuchi and Ryo Shomura and Yuhki Ohtsuka and Akari Hayashi and Kimihisa Yamamoto and Dirk G Kurth}, journal={Organic letters}, year={2006}, volume={8 21}, pages={4723-6} }