9Be NMR Relaxation Measurements of Bis(acetylacetonato)beryllium(II) in Liquid and Supercritical Carbon Dioxide:  A Clear Evidence of Near-Critical Solvation Effect on Rotational Correlation Time

2002 ◽  
Vol 106 (43) ◽  
pp. 11114-11119 ◽  
Author(s):  
Tatsuya Umecky ◽  
Mitsuhiro Kanakubo ◽  
Yutaka Ikushima
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Correlation Time ◽  
Nmr Relaxation ◽  
Rotational Correlation Time ◽  
Solvation Effect ◽  
Relaxation Measurements ◽  
Rotational Correlation ◽  
Supercritical Carbon

33S and 17O nuclear magnetic resonance study of liquid sulfur dioxide

1984 ◽  
Vol 62 (6) ◽  
pp. 1181-1183 ◽  
Author(s):  
Roderick E. Wasylishen ◽  
J. Bruce Macdonald ◽  
Jan O. Friedrich
Keyword(s):  
Sulfur Dioxide ◽  
Correlation Time ◽  
Nmr Relaxation ◽  
Rotational Correlation Time ◽  
Nuclear Magnetic Resonance Study ◽  
Relaxation Data ◽  
Liquid Sulfur ◽  
Quadrupolar Coupling ◽  
Constant E ◽  
Rotational Correlation

The sulfur-33 chemical shift and 33S and 17O nmr relaxation data are reported for liquid sulfur dioxide. The 33S nucleus in SO2 is highly deshielded, 375 ± 2 ppm to high frequency of the sulfate anion. The rotational correlation time of SO2 at 294 K, 0.3 ps, is only about twice that calculated using an inertial model. The temperature dependence of the 33S and 17O nmr relaxation data can be described by an average activation energy of 6.3 ± 0.6 kJ mol−1. The effective rotational correlation time derived from 33S nmr line widths is used to calculate the 17O quadrupolar coupling constant, e2qQ/h = 6.6 ± 0.7 MHz, in SO2.

Determination of protein rotational correlation time from NMR relaxation data at various solvent viscosities

2004 ◽  
Vol 30 (4) ◽  
pp. 431-442 ◽  
Author(s):  
Denis S. Korchuganov ◽  
Ivan E. Gagnidze ◽  
Elena N. Tkach ◽  
Alexey A. Schulga ◽  
Mikhail P. Kirpichnikov ◽  
...  
Keyword(s):  
Correlation Time ◽  
Nmr Relaxation ◽  
Rotational Correlation Time ◽  
Relaxation Data ◽  
Rotational Correlation
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