✦ LIBER ✦

Steric effects on the dynamical behaviour and 13C nuclear spin relaxation in flexible chain molecules

✍ Scribed by Tamio Yasukawa; Claude Chachaty

Publisher: Elsevier Science
Year: 1976
Tongue: English
Weight: 309 KB
Volume: 43
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(76)80624-0

No coin nor oath required. For personal study only.

✦ Synopsis

Stcric effects on the dynamical bchav~our and s3C nuclear spin relzxxatron m flexibIe &am molccuks have been exunincd by sunulating the random motions of n-hexyhunmc coordinated to Gd(FOD)3 with several mod& by ihe hfonte Carlo tcchniquc. 111~ spcctrdl density functions were calculated for the rcspcctive c;ubons of the hcxyl group and powr densities at the Larmor frcqucncy wcrc compared with cxpcrimcntal values of TIM. Simulation models where the pcntane effect is taken into considcr~tioo~ gave satkfactory results

📜 SIMILAR VOLUMES

Carbon-13 and mercury-199 nuclear spin r

Carbon-13 and mercury-199 nuclear spin relaxation study on solution dynamics of the bis(phenylethynyl)mercury molecule and shielding anisotropy of its acetyleniccarbon and mercury nuclei

✍ Adam Gryff-Keller; Sergey Molchanov 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 83 KB 👁 1 views

Carbon-13 longitudinal relaxation times and nuclear Overhauser effect enhancement factors at two magnetic fields and three temperatures were measured for a DMSO solution of bis(phenylethynyl)mercury and interpreted in terms of molecular mobility of the solute molecule. The problem of the effective C

Oxygen and solvent intermolecular effect

Oxygen and solvent intermolecular effects on the 13C spin-lattice relaxation process of C60 in deuterated toluene at 303 K

✍ Jennifer A. Jones; A.A. Rodriguez 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 356 KB

13C spin-lattice relaxation time measurements of buckminsterfullerene were performed in mixtures of protonated and deuterated toluene to determine the magnitude of the intermolecular contribution. Results show that a small but measurable contribution can be attributed to this mechanism. Inclusion of

Anisotropy of local relaxation propertie

Anisotropy of local relaxation properties of macromolecules. Spin-lattice relaxation of 13C nuclei, the nuclear overhauser effect and the estimation of parameters of an equivalent ellipsoid for kinetic segments of polymer chains

✍ Gotlib, Yuli Ya. ;Torchinski, Isaak A. ;Shevelev, Vladimir A. 📂 Article 📅 1993 🏛 Wiley (John Wiley & Sons) ⚖ 393 KB

## Abstract The expressions for the functions of spectral density at different orientations of the components of the internuclear vector with respect to the chain backbone, the frequency dependences of the spin‐lattice relaxation time of ^13^C nuclei (__T__~1C~) and the values of the nuclear Overha

High-resolution 13C NMR study of free an

High-resolution 13C NMR study of free and metal-complexed ionophores in the solid state: Conformation and dynamics of the macrocyclic ring and the effect of intermolecular short contact of methyl groups on spin–lattice relaxation times and displacements of chemical shifts

✍ Hazime Saitô; Ryoko Tabeta; Motoko Yokoi 📂 Article 📅 1988 🏛 John Wiley and Sons 🌐 English ⚖ 819 KB

High-resolution 13C NMR spectra of 15 samples of uncomplexed and metalcomplexed tetranactin and nonactin were recorded in the solid state, revealing characteristic displacements of peaks due to complex formation and the effect of crystalline packing on the 13C chemical shifts and spidattice relaxati