Pregled bibliografske jedinice broj: 233435
Cross Correlated Curie Spin Relaxation and Molecular Structure
Cross Correlated Curie Spin Relaxation and Molecular Structure // DU NMR 2003, Book of Abstracts / Vikić-Topić, Dražen (ur.).
Zagreb: Institut Ruđer Bošković, 2003. str. 40-41 (predavanje, međunarodna recenzija, sažetak, znanstveni)
CROSBI ID: 233435 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Cross Correlated Curie Spin Relaxation and Molecular Structure
Autori
Pintacuda, Guido ; Smrečki, Vilko ; Hohenthanner, Karin ; Otting, Gotfried ; Müller, Norbert
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
DU NMR 2003, Book of Abstracts
/ Vikić-Topić, Dražen - Zagreb : Institut Ruđer Bošković, 2003, 40-41
Skup
DU NMR 2003, The Fourth International Dubrovnik NMR Course & Conference
Mjesto i datum
Dubrovnik, Hrvatska, 28.06.2003. - 01.07.2003
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
NMR; Curie-spin relaxation; chemical shift anisotropy; cross-correlation effects
Sažetak
Curie-spin relaxation (CSR) is caused by the dipolar interaction between the nuclear and the thermally averaged electron magnetic moments, but it acts like a single-spin interaction for the nuclear spins involved. Therefore, cross-correlation effects between dipole-dipole (DD) and CSR relaxation are formally indistinguishable from cross-correlation effects between DD and chemical shift anisotropy (CSA). Cross-correlation effects between DD interactions and the Curie spin of paramagnetic ions contain information about the angle theta between the H-N bond and the vector connecting the proton with the paramagnetic centre. Due to the long-range effect of paramagnetic relaxation, these angle restraints provide a powerful tool for obtaining long-range structural information. We show experiments and simulations of the influence of the anisotropy of the magnetic susceptibility on DDxCSR relaxation effects for high- and low-spin met-myoglobin complexes and consequences on the angular constraints derived from these data. Strategies for dealing with the DDxCSA intereference are also given. Acknowledgement: This work was supported by the EU by a postdoctoral fellowship for G.P. within the Research Training Network on Cross-Correlation (HPRN-CT-2000-00092) and by the Swedish and Australian Research Councils as well as the Austrian Science Funds (FWF, project P15380) and the ÖAD (Austro-Croatian pilot project).
Izvorni jezik
Engleski
Znanstvena područja
Kemija
POVEZANOST RADA
