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Updated: Jan 19, 2026

Dissolution Dynamic Nuclear Polarization Instrumentation for Real-time Enzymatic Reaction Rate Measurements by NMR
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Dynamic nuclear polarization with photo-excited triplet electrons using 6,13-diphenylpentacene
Kenichiro Tateishi1, Makoto Negoro, Hiroshi Nonaka
1Cluster for Pioneering Research, RIKEN, Saitama 351-0198, Japan. kenichiro.tateishi@riken.jp.
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.
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