Two Dimensional NMR R. V. Hosur Department of Chemical ...iupab/WS_Nov24_2009_3.pdf · Department...

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Two Dimensional NMR R. V. Hosur Department of Chemical Sciences Tata Institute of Fundamental Research Homi Bhabha Road, Mumbai

Transcript of Two Dimensional NMR R. V. Hosur Department of Chemical ...iupab/WS_Nov24_2009_3.pdf · Department...

Page 1: Two Dimensional NMR R. V. Hosur Department of Chemical ...iupab/WS_Nov24_2009_3.pdf · Department of Chemical Sciences Tata Institute of Fundamental Research ... Spin-Echo 90 180

Two Dimensional NMR

R. V. Hosur

Department of Chemical SciencesTata Institute of Fundamental Research

Homi Bhabha Road, Mumbai

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Two Dimensional NMR

S(t1,t2) 2d FT

S(F1, F2)

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Two Dimensional NMR

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ββA1 A2 X1 X2

αα

αβ βαA1

A2X1

X2

βX αX βAαA

Coherence transfer

Inverting X spin causes A1 to A2 interchange

Inverting A spin causes X1 to X2 interchange

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t1/2 t1/2 t2

2D J-resolved Spectroscopy

J J + δ

Spin-Echo

90 180

Evolution Detection

Chemical Shifts are refocused

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J - δ separation

2D Separation

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2D Correlation Spectroscopy

NOESYInvestigation of exchange processes by two-dimensional NMR spectroscopyJ. Jeener, B. H. Meier, P. Bachmann, R. R. ErnstJ. Chem. Phys. 71, 4546-4553 (1979)

COSYTwo Dimensional Spectroscopy: Application to nuclear magnetic resonanceW. P. Aue, E. Bartholdi, R. R. ErnstJ. Chem. Phys. 64, 2229- 2246 (1976)

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….. COSY

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Total Correlation Spectroscopy (TOCSY)

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NOESY

ωτc >> 1 ωτc << 1

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NOESY

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500MHz 2D NOESY spectrum

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1 mM Lysozyme

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500MHz 2D NOESY spectrum

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Heteronuclear Single Quantum Coherence (HSQC)

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FKBP

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Receiver phase alternation cancels unwanted H magnetization not coupled to 13C

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HMQC - TOCSY spectrum

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