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CHEM462/562

Spectrometer instructions

Part 1: Determination of the proton 90 degree pulse:

Excel spreadsheet for Pulsewidth increment: 2 microseconds

Excel spreadsheet for Pulsewidth increment: 5 microseconds

ഀ Formula used in Excel: I = I0 * [sin (PW * pi / PW180) * exp (- PW / Pdecay)]ഀ

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with:  PW = pulse width (in microseconds)
pi / PW180 = conversion factor: microseconds -> radiansഀ
Pdecay = decay of pulse power for long pulses ഀ


Part 2: T1 relaxation: Use I = A - I0 * exp (- D2 / T1)


Part 3: T2 relaxation: Use I = I0 * exp (D2 / T2)           ഀ


Part 4: Nuclear Overhauser Enhancement:            
           NOE / NOESY data for Cellobiose Octaacetate
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