Title :
X-band and submillimeter-wave DNP experiments on radical-doped toluene solution
Author :
Toda, M. ; Fujii, Y. ; Mitsudo, S. ; Ogawa, I. ; Idehara, T. ; Saito, T. ; Ito, H. ; Chiba, M.
Author_Institution :
Res. Center for Far-Infrared Region, Univ. of Fukui, Fukui
Abstract :
The main purpose of our research is to develop the technique of DNP-NMR for the protein structural analysis. For that purpose, we have developed two DNP systems (only room temperature); one is an X-band system with a YIG oscillator and a TWTA, and the other is a submillimeter-wave system with a gyrotron. For the beginning, we have demonstrated the 1H-DNP experiment on BDPA-doped toluene solution at 11.4 GHz ESR frequency. Increase of the signal intensity of 1H-NMR (about -20 times at max.) has been observed at the onset of microwave irradiation. The submillimeter-wave experiments have been also performed, however, the temperature increase of toluene is so rapid that the DNP effect has not been confirmed yet.
Keywords :
gyrotrons; submillimetre wave devices; 1H-DNP experiment; BDPA-doped toluene solution; DNP-NMR; X-band DNP experiments; X-band system; YIG oscillator; gyrotron; microwave irradiation; protein structural analysis; radical-doped toluene solution; signal intensity; submillimeter-wave DNP experiments; submillimeter-wave system; Gyrotrons; Magnetic fields; Microwave frequencies; Nuclear magnetic resonance; Oscillators; Paramagnetic resonance; Protein engineering; Spectroscopy; Submillimeter wave technology; Temperature; ESR; Gyrotrons; NMR spectroscopy; Submillimeter wave radiation effects;
Conference_Titel :
Infrared and Millimeter Waves, 2007 and the 2007 15th International Conference on Terahertz Electronics. IRMMW-THz. Joint 32nd International Conference on
Conference_Location :
Cardiff
Print_ISBN :
978-1-4244-1438-3
DOI :
10.1109/ICIMW.2007.4516442
