A Magnetic Switch for Spin-Catalyzed Interconversion of Nuclear Spin Isomers
Journal of the American Chemical Society2010Vol. 132(12), pp. 4042–4043
Citations Over TimeTop 12% of 2010 papers
Yongjun Li, Xuegong Lei, Steffen Jockusch, Judy Chen, Michael Frunzi, Jeremiah A. Johnson, Ronald G. Lawler, Yasujiro Murata, Michihisa Murata, Kôichi Komatsu, Nicholas J. Turro
Abstract
The interconversion of ortho-hydrogen (oH(2)) and para-hydrogen (pH(2)), the two nuclear spin isomers of dihydrogen, requires a paramagnetic spin catalyst such as a nitroxide. We report the design and demonstration of spin catalysis of the interconversion of oH(2) and pH(2) incarcerated in an endofullerene based on a reversible nitroxide/hydroxylamine system. The system is an example of a reversible magnetic spin catalysis switch that can increase the rate of interconversion of the nuclear spin isomers of H(2) by a factor of approximately 10(4).
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