NMR spectroscopy with dynamic nuclear polarization using photo-excited triplet electron spins

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K13733
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Analytical chemistry
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: Tateishi Kenichiro 国立研究開発法人理化学研究所, 仁科加速器研究センター, 基礎科学特別研究員 (80709220)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 核磁気共鳴 / 動的核偏極 / 時間分解ESR / 光励起三重項 / ペンタセン

Outline of Final Research Achievements

We have demonstrated the 1H NMR signal enhancement of ~80. The sample, the mixture of ethanol-d6 and water doped with 6,13-diphenylpentacene, was polarized with Dynamic Nuclear Polarization using photo-excited triplet electron spins (Triplet-DNP).　We also carried out time-resolved ESR measurement to explore new polarizing agent for Triplet-DNP. Intersystem crossing yield and lifetime of the triplet state of pentacene can be controlled by changing visible absorption and spin-orbit coupling strength.

Free Research Field

分析化学