Construction of Coordination-Driven Self-Assembled [5 + 5] Pentagons Using Metal−Carbonyl Dipyridine Ligands
摘要:
The coordination-driven self-assembly of two metal-carbonyl-cluster-coordinated dipyridyl donors, (4-C5H4N)(2)C equivalent to CCo2(CO)(6) (1) and (4- C5H4N)(2)C equivalent to CMo2Cp2(CO)(4) (2), with a linear diplatinum (11) acceptor ligand was investigated. The structures of the resulting self-assembled polygons were found to be controlled by the steric bulk of the metal-carbonyl cluster adduct. The use of a sterically less imposing ligand 1 resulted in a pentagon-hexagon mixture, which was characterized by electrospray ionization time-of-flight mass spectroscopy. The exclusive formation of a [5 + 5] pentagon was achieved by the self-assembly of the bulkier molybdenum donor ligand 2 with a linear organoplatinum(II) acceptor ligand. Molecular force field modeling was used to study the structural details of the pentagonal and hexagonal architectures. The first Fe-3-Co-6-Pt-6 trimetal [3 + 3] hexagon was also synthesized via the combination of 1 with a 120 degrees ferrocenyldiplatinum(II) acceptor.
Ghosh, Koushik; Hu, Jiming; White, Henry S., Journal of the American Chemical Society, 2009, vol. 131, p. 6695 - 6697
作者:Ghosh, Koushik、Hu, Jiming、White, Henry S.、Stang, Peter J.
DOI:——
日期:——
Facile Self-Assembly of Dendritic Multiferrocenyl Hexagons and Their Electrochemistry
作者:Guang-Zhen Zhao、Li-Jun Chen、Cui-Hong Wang、Hai-Bo Yang、Koushik Ghosh、Yao-Rong Zheng、Matthew M. Lyndon、David C. Muddiman、Peter J. Stang
DOI:10.1021/om1008605
日期:2010.11.22
The design and synthesis of a new class of dendritic multiferrocenyl hexagons have been achieved via [3+3] coordination-driven self-assembly. The relative distribution of dendritic and ferrocenyl subunits on the periphery of supramolecular metallocycles can be precisely controlled. The structures of all compounds are confirmed by multinuclear NMR, ESI-MS/ESI-TOF-MS, and elemental analysis. The electrochemical properties of the newly designed dendritic multiferrocenyl complexes have been studied through cyclic voltammetry investigation.