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Composition-defined nanosized assemblies that contain heterometallic early 4d/5d-transition-metals

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Abstract

The controlled assembly of early transition metals remains a challenging research target, especially with respect to the generation of heterometallic molecules and nanomaterials. In this study, metal chlorides of the early 4d/5d-transition-metals, i.e., ZrCl4, NbCl5, MoCl5, HfCl4, TaCl5, and WCl6, were stoichiometrically introduced into a tetraphenylmethane-core dendritic-phenylazomethine generation 4 dendrimer in the presence of an optimal amount of organic ligands such as pyridine and 3-chloropyridine. The coordinative interactions between the metal chlorides and the imines in the dendrimers indicated a positive correlation for the Lewis acidity of the metals. Moreover, it was clearly demonstrated for the first time that heterometallic assemblies of defined composition contain four kinds of early 4d/5d-transition-metals, such as TaV, NbV, MoV, and ZrIV, which was confirmed by UV-vis titration, XPS, and HAADF-STEM/EDS measurements. The results of this study should provide access to new routes to produce nanomaterials composed of heterometallic early 4d/5d-transition metals.

Graphical abstract: Composition-defined nanosized assemblies that contain heterometallic early 4d/5d-transition-metals

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Publication details

The article was received on 29 Jul 2019, accepted on 05 Aug 2019 and first published on 06 Aug 2019


Article type: Paper
DOI: 10.1039/C9DT03094H
Dalton Trans., 2019, Advance Article

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    Composition-defined nanosized assemblies that contain heterometallic early 4d/5d-transition-metals

    M. Wakizaka, T. Imaoka and K. Yamamoto, Dalton Trans., 2019, Advance Article , DOI: 10.1039/C9DT03094H

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