Effect of magnetic particles on NMR spectra of Murchison meteorite organic matter and a polymer-based model system.
作者： E.M. Levin , S.L. Bud’ko , J.D. Mao , Y. Huang , K. Schmidt-Rohr
DOI: 10.1016/J.SSNMR.2007.01.002
关键词:
摘要: Abstract Organic matter from the Murchison meteorite shows pronounced spinning sidebands of 1 H MAS NMR spectrum and exhibits a large bulk magnetization 0.75 emu/g extrapolated to 94 kOe at 300 K. By comparison with data diamagnetic polystyrene laponite clay mixed ferrimagnetic γ -Fe 2 O 3 nano-particles, we show that arise combination dipolar couplings given magnetic particles, seen in backscattered-electron image, other protons. Signal loss significant broadening protonated-carbon peaks 13 C spectra Fe nano-particles is demonstrated, implications for spectroscopy are discussed.
elsevier.com
sci-hub.se 参考文章(33)
A. B. P. Lever, C. Luchinat, Ivano Bertini, NMR of paramagnetic substances Elsevier. ,(1996)
T. Michael Duncan, A Compilation of Chemical Shift Anisotropies ,(1990)
Ronald J. Smernik, J.Malcolm Oades, The use of spin counting for determining quantitation in solid state 13C NMR spectra of natural organic matter: 1. Model systems and the effects of paramagnetic impurities Geoderma. ,vol. 96, pp. 101- 129 ,(2000) , 10.1016/S0016-7061(00)00006-9
Jordi Llorca, Organic matter in meteorites International Microbiology. ,vol. 7, pp. 239- 248 ,(2004) , 10.2436/IM.V7I4.9479
D. S. McKay, E. K. Gibson, K. L. Thomas-Keprta, H. Vali, C. S. Romanek, S. J. Clemett, X. D. F. Chillier, C. R. Maechling, R. N. Zare, Search for past life on Mars: possible relic biogenic activity in martian meteorite ALH84001. Science. ,vol. 273, pp. 924- 930 ,(1996) , 10.1126/SCIENCE.273.5277.924
D. Ito, K. Miura, T. Ichimura, I. Ihara, T. Watanabe, Removal of As, Cd, Hg and Pb Ions From Solution by Adsorption With Bacterially-Produced Magnetic Iron Sulfide Particles Using High Gradient Magnetic Separation IEEE Transactions on Appiled Superconductivity. ,vol. 14, pp. 1551- 1553 ,(2004) , 10.1109/TASC.2004.830704
Arvind-Pal S. Mandair, Paul J. Michael, William R. McWhinnie, 29Si MASNMR investigations of the thermochemistry of laponite and hectorite Polyhedron. ,vol. 9, pp. 517- 525 ,(1990) , 10.1016/S0277-5387(00)86228-2
E. M. Levin, S.-S. Hou, S. L. Bud’ko, K. Schmidt-Rohr, Magnetism and nuclear magnetic resonance of hectorite and montmorillonite layered silicates Journal of Applied Physics. ,vol. 96, pp. 5085- 5092 ,(2004) , 10.1063/1.1794364
Gunther KLETETSCHKA, Tomas KOHOUT, Peter J. WASILEWSKI, Magnetic remanence in the Murchison meteorite Meteoritics & Planetary Science. ,vol. 38, pp. 399- 405 ,(2003) , 10.1111/J.1945-5100.2003.TB00275.X
Robert E. Botto, Rosemary Wilson, Randall E. Winans, Evaluation of the reliability of solid 13C-NMR spectroscopy for the quantitative analysis of coals: study of whole coals and maceral concentrates Energy & Fuels. ,vol. 1, pp. 173- 181 ,(1987) , 10.1021/EF00002A006