Modern applications of NMR spectroscopy: Heteronuclei
Vorlesung WS 2019/20
(1) General overview
NMR-PTE, index, active spins, c.s. trends, c.s. ranges (1), c.s. ranges (2), 2nd order coupling (1), 2nd order coupling (2), BH4 spin system, B2H4Me2 spin system, chemical shift ranges (I 1/2), c.s. ranges (I > 1/2), c.s. referencing (Xi scale), c.s. B-11, c.s. N-14/15, c.s. P-31, receptivity of X nuclei, 'practicability' of X nuclei, relaxation (N-14), influence I on linewidth, literature.
(2) Methods and physical background
Detection modes for X nuclear acquisition, INEPT experiment, signal enhancement (NOE vs. INEPT, NOE vs. INEPT (2)), heteronuclear NOE, sensitivity of methods, heteronuclear COSY, 3D methods, suppression of acoustic ringing, lineshape for quadrupolar nuclei, choice of experiment, diffusion-ordered NMR (DOSY), INADEQUATE, PHIP for intermediates, solid state (distances), literature.
(3) Heteronuclei (part 1)
(4) Heteronuclei (part 2)
Quadrupolar nuclei (selected list), suitable/intermediate/tricky (selection), Li-6 (1D NOE), Li-6 (HOESY), Be-9 example, B-11 example, Ti-49/47 example, Co-59 (c.s. vs. ligand field, structure-activity relation), V-51 (chemical shift range), Al-27 (influence of symmetry)
(6) Applications - coordination chemistry
Dynamics in NMR: lineshape of NMR spectra (regimes of NMR timescale, lineshape and rate constant, non-symmetric case), Na-23 (exchange in slow regime), O-17 (exchange with v.t. NMR), P-31 (ligand exchange with v.t. NMR), saturation transfer (Os COD complex)
(7) Applications - organometallic chemistry
(8) Applications - bioinorganic, biology
(9) Extra: Xe-129 NMR for sensing and imaging