期刊
DALTON TRANSACTIONS
卷 44, 期 17, 页码 7870-7880出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5dt00311c
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资金
- Auvergne Region (France)
- EPSRC
- EPSRC [EP/F022530/1, EP/G009546/1, EP/H029575/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F022530/1, EP/G009546/1, EP/H029575/1, GR/S23605/01] Funding Source: researchfish
The catalytic hyperpolarisation of pyridine, 3-hydroxypyridine and oxazole by the Signal Amplification By Reversible Exchange (SABRE) process is achieved by a series of water soluble iridium phosphine and N-heterocyclic carbene dihydride complexes. While the efficiency of the SABRE process in methanol-d(4) solution or ethanol-d(6) solution is high, with over 400-fold H-1 polarisation of pyridine being produced by [Ir(H)(2)(NCMe)(py)(IMes)(monosulfonated-triphenylphosphine)] BF4, changing to a D2O or a D2O-ethanol solvent mixture leads to dramatically reduced activity which is rationalised in terms of low H-2 solubility.
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