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High-resolution 13C DNP NMR and 13C knight shift suppression in single crystals of the organic conductor (fluoranthenyl)2PF6

✍ Scribed by W. Stöcklein; H. Seidel; D. Singel; R.D. Kendrick; C.S. Yannoni

Publisher: Elsevier Science
Year: 1987
Tongue: English
Weight: 510 KB
Volume: 141
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(87)85023-6

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✦ Synopsis

We report a 13C DNP NMR study of the organic conductor fluoranthenyl (FA) radical cation salt (FA),f PF; We have been able to suppress the Knight shift by saturating the ESR line. Overhauser enhancements achieved were large enough to detect lOi carbons after 1 s of microwave saturation.

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13C knight shift saturation and 1H dynamic nuclear polarization in a polycrystalline sample of the organic conductor (fluoranthenyl)2PF6

✍ Robert A. Wind; Herman Lock; Michael Mehring 📂 Article 📅 1987 🏛 Elsevier Science 🌐 English ⚖ 477 KB

It is demonstrated that the "C Knight shift in the organic conductor ( fluoranthenyl),PF, can be reduced by saturating the conduction electron ESR line with microwave irradiation. It is also found that microwave irradiation leads to a nuclear polarization enhancement due to the Overhauser effect. Th