Single nanoscale cluster species revealed by 1H NMR diffusion-ordered spectroscopy and small-angle X-ray scattering.
A solved structure: The hydrated Ga(13) cluster, [Ga(13)(μ(3)-OH)(6)(μ-OH)(18)(H(2)O)(24)](NO(3))(15)], persists as a discrete nanoscale structure in an aqueous polar solvent at millimolar concentration. SAXS data confirm the presence of Ga(13) in dimethyl sulfoxide (DMSO). In aqueous [D(6)]DMSO (1)H NMR signals for the hydroxo and aquo ligands of Ga(13) were detected, thus showing a cluster with a hydrodynamic radius of (11.2±0.8) Å (see picture).
Department of Chemistry and Materials Science Institute, University of Oregon, Eugene, Oregon 97403-1253, USA.
Anna F
AF
Oliveri
Matthew E
ME
Carnes
Matthew M
MM
Baseman
Erik K
EK
Richman
James E
JE
Hutchison
Darren W
DW
Johnson
D004058:Diffusion; D005708:Gallium / Q000737:chemistry*; D057446:Hydrodynamics; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D015394:Molecular Structure; D049329:Nanostructures / Q000737:chemistry*; D011522:Protons; D053838:Scattering, Small Angle; D014961:X-Ray Diffraction
D011522:Protons; D005708:Gallium