scholarly journals A high saturation factor in Overhauser DNP with nitroxide derivatives: the role of 14N nuclear spin relaxation

2015 ◽  
Vol 17 (17) ◽  
pp. 11144-11149 ◽  
Author(s):  
Nikolay Enkin ◽  
Guoquan Liu ◽  
Maria del Carmen Gimenez-Lopez ◽  
Kyriakos Porfyrakis ◽  
Igor Tkach ◽  
...  
Keyword(s):  
Spin Relaxation ◽  
Nuclear Spin ◽  
Nuclear Spin Relaxation ◽  
Nitroxide Radicals ◽  
High Saturation ◽  
Saturation Factor

Functionalization of nitroxide radicals leads to an increase of the saturation factor and of the Overhauser DNP enhancement.

Longitudinal Relaxation Time Measurements in Hydrogen Gas Mixtures at Low Densities

1975 ◽  
Vol 53 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Robin L. Armstrong ◽  
Kenneth E. Kisman ◽  
Wallace Kalechstein
Keyword(s):  
Relaxation Time ◽  
Spin Relaxation ◽  
Nuclear Spin ◽  
Molecular Nitrogen ◽  
Hydrogen Gas ◽  
Inelastic Collisions ◽  
Nuclear Spin Relaxation ◽  
Longitudinal Relaxation Time ◽  
Preliminary Information

Measurements of the longitudinal nuclear spin relaxation time through the region of the characteristic minimum at 49 MHz in mixtures of molecular hydrogen with the noble gases helium and argon and with molecular nitrogen are reported at 298 K. The data obtained serve as a further test of the basic approximations in the Bloom–Oppenheim theory and provide preliminary information concerning the role of inelastic collisions in the nuclear spin relaxation process.

Sign in / Sign up

Export Citation Format

Share Document