✦ LIBER ✦

Temperature effects on the 13C high resolution NMR in (TMTSF)2X salts

✍ Scribed by P. Bernier; P.C. Stein; C. Lenoir

Publisher: Elsevier Science
Year: 1986
Weight: 152 KB
Volume: 143
Category: Article
ISSN: 0378-4363
DOI: 10.1016/0378-4363(86)90176-2

No coin nor oath required. For personal study only.

✦ Synopsis

We report the results of 13C NMR experiments performed on TMTSF molecules of the organic; conductor (TMTSF)2ReO 4. This investigation has allowed to resolve the sites of the organic molecule in both the metallic and the semiconducting state. Continuous variations of the resonance positions are observed when the t~mperature is decreased down to 182K, temperature at which the system exhibits a structural transition, leading to a semiconductin] state at lower temperature. This experiment constitutes the first observation in real space of the collapse of the conduction electron density at a metal-semiconductor transition.

📜 SIMILAR VOLUMES

High resolution NMR investigation in the

High resolution NMR investigation in the organic conductors (TMTSF)2X, X = ClO4, ReO4

✍ P.C. Stein; P. Bernier; C. Lenoir 📂 Article 📅 1986 🏛 Elsevier Science ⚖ 138 KB

High resolution 13C NMR spectroscopy. IV

High resolution 13C NMR spectroscopy. IV—stereochemical assignments in butenedioic acids and 3-pentene-2-ones

✍ S. Braun 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 English ⚖ 550 KB

## Vicinal -C, H coupling C O M ~~S ,J(CO, H) for butenedioic acids and 'J(CH,, H) for 3-pentene-2-ones have been determined and are correlated with the con6gurathn of the corresponding C=C double bond. For both types the ~W i ~~h i p "J(CH)mns > 'J(CH)cis holds; in the case of the CH,, H coupling

Synthetic metals based on tetramethyltet

Synthetic metals based on tetramethyltetraselenafulvalene(TMTSF): Varied anisotropy in the low temperature (125K) structures of (TMTSF)2X, X=C104-, PF6-, and AsF6-.

✍ M.A. Beno; Jack M. Williams; M.M. Lee; D.O. Cowan 📂 Article 📅 1982 🏛 Elsevier Science 🌐 English ⚖ 234 KB

High-resolution 13C DNP NMR and 13C knig

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

✍ W. Stöcklein; H. Seidel; D. Singel; R.D. Kendrick; C.S. Yannoni 📂 Article 📅 1987 🏛 Elsevier Science 🌐 English ⚖ 510 KB

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.

Effect of substituents on the 13C NMR ch

Effect of substituents on the 13C NMR chemical shifts of 2-R-3-methylbenzothiazolium quaternary salts and 2-R-benzothiazoles

✍ Eva Solčániová; Igor Čulák 📂 Article 📅 1989 🏛 John Wiley and Sons 🌐 English ⚖ 150 KB 👁 1 views

The 13C chemical shifts of 2-R-3-methylbenzothiazolium quaternary salts and the corresponding ZRbenzothiazoles are presented. ## KEY WORDS I3C NMR Substituent effects 2-R-3-methylbenzothiazoliurn quaternary salts 2-R-benzothiazoles reveal some systematic trends in the 13C data for these comr>ound

E-2-Benzylidenebenzocycloalkanones. IV.

E-2-Benzylidenebenzocycloalkanones. IV. Studies on transmission of substituent effects on 13C NMR chemical shifts of E-2-(X-benzylidene)-1-tetralones, and -benzosuberones. Comparison with the 13C NMR data of chalcones and E-2-(X-benzylidene)-1-indanones

✍ Pál Perjési; Juha Linnanto; Erkki Kolehmainen; Erzsébet Ősz; Elina Virtanen 📂 Article 📅 2005 🏛 Elsevier Science 🌐 English ⚖ 141 KB