1. Dynamic nuclear polarization with photo-excited triplet electrons using 6,13-diphenylpentacene
- Author
-
Masahiro Kitagawa, Tomohiro Uesaka, Makoto Negoro, Satoshi Wada, Kenichiro Tateishi, Akinori Kagawa, Hiroshi Nonaka, and Shinsuke Sando
- Subjects
Materials science ,Spins ,Doping ,General Physics and Astronomy ,02 engineering and technology ,Electron ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Molecular physics ,0104 chemical sciences ,Pentacene ,chemistry.chemical_compound ,chemistry ,Excited state ,Physical and Theoretical Chemistry ,Solubility ,0210 nano-technology ,Polarization (electrochemistry) - Abstract
Dynamic nuclear polarization with photo-excited triplet electrons (Triplet-DNP) is demonstrated using 6,13-diphenylpentacene (DPPentacene). DPPentacene is soluble in various organic solvents, while pentacene, which is used in most of the triplet-DNP experiments, has limited solubility. An enhancement factor of 81 is obtained for 1H spins in the glass of ethanol-d6 : water = 80 : 20 (w/w) doped with 0.1 mM DPPentacene at 90 K in 0.67 T.
- Published
- 2019