The sensitivity of the 14N-hyperfine splitting of nitroxide spin to the local electric field, Eloc, has often been used to probe the polarity of microenvironments; however, two uncertainties have been faced at once as follows: (i) the value of Eloc in . . .

The sensitivity of the 14N-hyperfine splitting of nitroxide spin to the local electric field, Eloc, has often been used to probe the polarity of microenvironments; however, two uncertainties have been faced at once as follows: (i) the value of Eloc in . . .