High-resolution solid-state NMR in liquids. 2. sup 27 Al NMR study of AlF sub 3 ultrafine particles

Journal Article · Wed Jun 06 00:00:00 EDT 1990 · Journal of the American Chemical Society; (USA)

DOI:https://doi.org/10.1021/ja00168a010· OSTI ID:6880118

Satoh, Naoki ^[1]; Kimura, Keisaku ^[2]

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1. Kao Institute for Fundamental Research, Wakayama (Japan)
2. Institute for Molecular Science, Okazaki (Japan)

High-resolution {sup 27}Al nuclear magnetic resonance spectra of AlF{sub 3} ultrafine particles (UFPs) were obtained by means of motional narrowing caused by Brownian motion of UFPs in a liquid phase. The NMR observed spectra can be resolved in five signals at 10, {minus}5, {minus}8, {minus}12, and {minus}16 ppm with respect to an Al{sup 3+}(H{sub 2}O){sub 6} standard. The UFPs were fractionated according to their sizes by using an ultrafiltration technique. From the NMR measurements of fractionated colloidal solutions, the five peaks were classified into three groups by their origins, viz. the peak at {minus}16 ppm is from larger UFPs (diameter D; 9 nm), those at {minus}5, {minus}8, and {minus}12 ppm from smaller UFPs (1 < D < 3 nm), while that at 10 ppm from free ions. Line widths of the larger and smaller UFPs were about 10 and 4 ppm (i.e., 1 and 0.4 kHz), respectively.

• OSTI ID: 6880118
• Journal Information: Journal of the American Chemical Society; (USA), Vol. 112:12; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALUMINIUM FLUORIDES
NUCLEAR MAGNETIC RESONANCE
DATA ANALYSIS
EXPERIMENTAL DATA
MEASURING INSTRUMENTS
MEASURING METHODS
PARTICLES
ALUMINIUM COMPOUNDS
DATA
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
INFORMATION
MAGNETIC RESONANCE
NUMERICAL DATA
RESONANCE
400201* - Chemical &amp; Physicochemical Properties