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

fYear

2007

fDate

2-9 Sept. 2007

Firstpage

166

Lastpage

167

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICIMW.2007.4516442

Filename

4516442