Coordination-Driven Self-Assembly of Metallodendrimers Possessing Well-Defined and Controllable Cavities as Cores.
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| Title: | Coordination-Driven Self-Assembly of Metallodendrimers Possessing Well-Defined and Controllable Cavities as Cores. |
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| Authors: | Hai-Bo Yang1 hbyang@chem.utah.edu, Hawkridge, Adam M.2, Huang, Songping D.3, Das, Neeladri1, Bunge, Scott D.3, Muddiman, David C.2, Stang, Peter J.1 stang@chem.utah.edu |
| Source: | Journal of the American Chemical Society. 2/21/2007, Vol. 129 Issue 7, p2120-2129. 10p. |
| Subjects: | Dendrimers, Molecular self-assembly, Mass spectrometry, X-ray crystallography, Macromolecules, Self-organizing systems |
| Abstract: | The design and self-assembly of novel cavity-cored metallodendrimers via noncovalent interactions are described. By employing [G0]-[G3] 120° ditopic donor linkers substituted with Frechet-type dendrons and appropriate rigid di-Pt(ll) acceptor subunits, [G0]-[G3]-rhomboidal metallodendrimers and [G0]-[G3]-hexagonal, "snowflake-shaped" metallodendrimers with well-defined shape and size were prepared under mild conditions in high yields. The assemblies were characterized with multinuclear NMR (¹H and 31P), mass spectrometry (ESI-MS and ESI-FT-ICR-MS), and elemental analysis. Isotopically resolved mass spectrometry data support the existence of the metallodendrimers with rhomboidal and hexagonal cavities, and NMR data are consistent with the formation of all ensembles. The structures of [GO]- and [G1]-rhomboidal metallodendrimers were unambiguously confirmed via single-crystal X-ray crystallography. The shape and size of two [G3]-hexagonal metallodendrimers were investigated with MM2 force-field modeling. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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