Ultrahigh-resolution phosphorus-31 NMR

Journal Article · Wed Sep 13 04:00:00 EDT 1989 · Journal of the American Chemical Society; (USA)

DOI:https://doi.org/10.1021/ja00201a001· OSTI ID:6709049

Maple, S R; Carson, J E; Allerhand, A ^[1]

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1. Indiana Univ., Bloomington (USA)

The feasibility of ultrahigh-resolution {sup 31}P NMR on both 200- and 500-MHz ({sup 1}H resonance frequency) instruments is demonstrated. Results indicate that temperature gradients within the sample caused by proton decoupling have severely limited the resolution achieved on commercial instruments due to the larger temperature dependence of {sup 31}P chemical shifts exhibited by many phosphorous-containing molecules, relative to {sup 13}C chemical shifts. Conditions are described under which instrumental contributions to the observed line width of as little as 15 MHz are observed. Measurements of {sup 31}P-{sup 13}C scalar coupling constants and {sup 13}C isotope effects on {sup 31}P chemical shifts are presented.

• OSTI ID: 6709049
• Journal Information: Journal of the American Chemical Society; (USA), Journal Name: Journal of the American Chemical Society; (USA) Vol. 111:19; ISSN 0002-7863; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400200* -- Inorganic
Organic
& Physical Chemistry
CALCULATION METHODS
CHEMICAL SHIFT
DATA
DATA ANALYSIS
EXPERIMENTAL DATA
FREQUENCY RANGE
INFORMATION
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
MEASURING INSTRUMENTS
MEASURING METHODS
MHZ RANGE
MHZ RANGE 100-1000
NUCLEAR MAGNETIC RESONANCE
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
PHOSPHORUS 31
PHOSPHORUS ISOTOPES
RESONANCE
STABLE ISOTOPES