title: Coordination-driven self-assembly of three-dimensional supramolecular dendrimers.
abstract: The design and synthesis of novel three-dimensional (3-D) supramolecular dendrimers is described. The coordination-driven self-assembly of a 120 degrees diplatinum acceptor and tritopic pyridyl donors bearing [G-0]-[G-3] Fréchet-type dendrons results in a series of supramolecular dendrimers under mild conditions, possessing a robust adamantanoid core of well-defined shape and size. The assemblies were identified using multinuclear ((31)P and (1)H) NMR spectroscopy and electrospray ionization mass spectrometry, as well as pulsed-field-gradient spin-echo (PGSE) NMR measurement together with computational simulations. Isotopically resolved mass spectral data support the existence of the [6 + 4] assembly of adamantanoid dendrimers, and the NMR results are consistent with the formation of these symmetrical assemblies. PGSE NMR measurements together with MMFF force-field modeling clearly reveal the structural feature of the 3-D supramolecular dendrimers with varying sizes.
authors.affiliation: Department of Chemistry, University of Utah, 315 South 1400 East, Room 2020, Salt Lake City, Utah 84112, USA.
authors.forename: Yao-Rong
authors.initials: YR
authors.lastname: Zheng
authors.forename: Koushik
authors.initials: K
authors.lastname: Ghosh
authors.forename: Hai-Bo
authors.initials: HB
authors.lastname: Yang
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Stang
mesh_terms: D018360:Crystallography, X-Ray; D050091:Dendrimers / Q000138:chemical synthesis* / Q000737:chemistry; D046911:Macromolecular Substances / Q000138:chemical synthesis / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D010984:Platinum / Q000737:chemistry; D011725:Pyridines / Q000737:chemistry
chemical_list: D050091:Dendrimers; D046911:Macromolecular Substances; D009942:Organometallic Compounds; D011725:Pyridines; D010984:Platinum