Abstract
Phenylazomethine dendrimer (DPA) is a dendritic ligand that coordinates to various Lewis acids in a stepwise radial fashion. Second generation para-substituted and meta-substituted phenylazomethine dendrimers with p-phenylenediamine and m-phenylenediamine core were synthesized and the coordination sequence was investigated by UV–vis titration. Stepwise radial complexation from the outer layer was observed for the m-phenylenediamine core meta-substituted phenylazomethine dendrimer (m-mG2). Other three dendrimers showed stepwise radial complexation from the inner layer. The reason could be explained with the binding constant of the 1st generation dendrimer (model of the 1st layer). This is suggesting that for controlling the coordination sequence of DPA, not only the dendron structure is important, but also the structure of the core is an important factor.
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Acknowledgments
This work was supported in part by the CREST program of the Japan Science and Technology (JST) Agency, Grant-in-Aid for Scientific Research on Innovative Areas “Molecular Architectonics: Orchestration of Single Molecules for Novel Functions”, and by JSPS KAKENHI Grant Numbers 26410128, 80220458, and 21108009.
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Albrecht, K., Sakane, N., Inomata, Y. et al. Effect of the Core Structure on the Sequential Coordination of Phenylazomethine Dendrimer. J Inorg Organomet Polym 25, 133–139 (2015). https://doi.org/10.1007/s10904-014-0116-y
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DOI: https://doi.org/10.1007/s10904-014-0116-y