Esmaspäeval, 27. mail 2019 kell 16.15 toimub Physicumis, W.Ostwaldi 1 seminariruumis D312
Laserspektroskoopia seminar No 273
Esineb Kristjan Kaup
TÜ KI magistrant
Real-time band-selective PureShift NMR using linear extrapolation
Nuclear magnetic resonance spectroscopy (NMR) is a widely used spectroscopic technique used for identification of molecular compounds within unknown samples and for analysing the structure, dynamics and chemical environment of molecules. Most common type of NMR spectroscopy is proton-NMR. Signals of NMR spectra can be split under the effects of scalar-coupling. This can provide useful structural information but for more complex samples, this can cause signal overlap, making the spectra impossible to interpret. PureShift NMR is a group of methods to obtain NMR spectra without scalar-coupling effects. Band-selective PureShift NMR uses selective pulses to decouple spins selectively.
This has been used in interferogram type of acquisition method as well as real-time acquisition method. Real-time acquisition method causes broadening of all spectral lines, due to pulse imperfections and relaxation. Lately it has been shown that using a semi-real-time acquisition method line broadening can be avoided. We show a new method where using linear extrapolation post-processing we can achieve a similar spectrum with real-time acquisition.