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Volumn 130, Issue 2, 2008, Pages 414-415

Unexpected fractionation in site-specific 13C isotopic distribution detected by quantitative 13C NMR at natural abundance

Author keywords

[No Author keywords available]

Indexed keywords

CARBON 13;

EID: 41449115922     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja0771181     Document Type: Article
Times cited : (41)

References (20)
  • 6
    • 41449102728 scopus 로고    scopus 로고
    • 12C isotopic ratio (= 0.0112372) of the international standard reference product, Vienna-Pee Dee Belemnite (VPDB).
    • 12C isotopic ratio (= 0.0112372) of the international standard reference product, Vienna-Pee Dee Belemnite (VPDB).
  • 15
    • 41449104024 scopus 로고    scopus 로고
    • Quantitative 13C NMR spectra were recorded using a Bruker DRX 500 spectrometer fitted with a 5 mm i.d. dual probe 13C/1H carefully tuned at the recording frequency of 125.76 MHz. The temperature of the probe was set at 303 K. The experimental parameters for 13C NMR spectral acquisition were the following: pulse width 4.3 μs (90°, spectral width 10000 Hz (for ethanol) or 30030 Hz (for vanillin, sampling period 1 s. Inverse-gated decoupling was applied in order to avoid NOE. The decoupling sequence employed a cosine adiabatic pulse with appropriate phase cycles, as described in ref 15. Free induction decay was submitted to an exponential multiplication inducing a line broadening of 2 Hz. Curve fitting was carried out in accordance with a Lorentzian mathematical model using Perch Software (Perch NMR Software. University of Kuopio, Finland, Preparation of the samples: for ethanol at natural abundance 700 μL, 200 μL of distilled
    • 6 + 100 μL of 0.1 M CrAcac (tris(2,4-pentadionato) chromium(III)) solution in acetone), 92 scans using a repetition delay of 21 s.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.