1H NMR Studies on the Motion of Cations in the Three Solid Phases of Methylammonium Perchlorate Including Cationic Self-Diffusion in Its Highest-Temperature Solid Phase

Abstract Seven solid phases including three metastable phases of (CH3)3CNH3NO3 were revealed by differential thermal analysis in the temperature range between 80 K and the melting point (418 K), and cationic dynamics in each phase was studied by use of 1H-NMR techniques. The highesttemperature solid phase obtainable above 412 K was found to be an ionic plastic phase, where the cations perform rapid translational self-diffusion and overall rotation about their center of gravity.

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1H and 19 F NMR Studies on Molecular Motions in Two Solid Phases of t-Butylammonium Tetrafluoroborate

Zeitschrift für Naturforschung A ◽

10.1515/zna-1998-0912 ◽

1998 ◽

Vol 53 (9) ◽

pp. 796-800 ◽

Cited By ~ 2

Author(s):

Hiroyuki Ishida

Keyword(s):

Solid Phase ◽

Lattice Relaxation ◽

Lattice Relaxation Time ◽

Spin Lattice Relaxation ◽

Scanning Calorimetry ◽

Nmr Studies ◽

Spin Lattice ◽

Solid Phases ◽

Solid Phase Transition ◽

19 F Nmr

Abstract Differential thermal analysis (DTA), differential scanning calorimetry (DSC), and the temperature dependence of the spin-lattice relaxation time (T1) and the second moment (M2) of 1H and 19F NMR were studied in (CH3)3CNH3BF4 and (CH3)3CND3BF4 . DTA and DSC revealed a solid-solid phase transition at 219 K for (CH3)3CNH3BF4 and at 221 K for (CH3)3CND3BF4 . The motions of cations and anions in the two solid phases were studied by T1 and M2 experiments. The motional modes of the ions and their motional parameters were determined.

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Self-Diffusion, Overall Rotation of Molecules, and Ring Motions in the Three Solid Phases of Formylferrocene, Fe(C5H5) (C5H4CHO), as Studied by 1H NMR and Differential Thermal Analysis

Berichte der Bunsengesellschaft für physikalische Chemie ◽

10.1002/bbpc.19860900519 ◽

1986 ◽

Vol 90 (5) ◽

pp. 479-485 ◽

Cited By ~ 4

Author(s):

Atsushi Kubo ◽

Ryuichi Ikeda ◽

Daiyu Nakamura

Keyword(s):

Thermal Analysis ◽

Differential Thermal Analysis ◽

1H Nmr ◽

Self Diffusion ◽

Solid Phases

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1H NMR studies of [N-MeAib1, Tyr(Me)4]ANGII and [N-MeAib1, Tyr(Me)4, Ile8]ANGII in dimethylsulfoxide by nuclear Overhauser effect (NOE) enhancement spectroscopy: cis-trans Isomerism of the His-Pro bond

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19901106 ◽

1990 ◽

Vol 55 (4) ◽

pp. 1106-1111 ◽

Cited By ~ 1

Author(s):

John Matsoukas ◽

Paul Cordopatis ◽

Raghav Yamdagni ◽

Graham J. Moore

Keyword(s):

1H Nmr ◽

Nuclear Overhauser Effect ◽

Nmr Studies ◽

Restricted Rotation ◽

Overhauser Effect ◽

Major Isomer ◽

Conformational Properties ◽

Nuclear Overhauser

The conformational properties of the Sarmesin analogues [N-MeAib1, Tyr(Me)4]ANGII and [N-MeAib1, Tyr(Me)4, Ile8]ANGII in hexadeutero-dimethysulfoxide were investigated by Nuclear Overhauser Effect (NOE) Enhancement Studies. Cis-trans isomers (ratio 1 : 6) due to restricted rotation of the His-Pro bond were observed. Interresidue interactions between the His Cα proton and the two Pro Cδ protons revealed that the major isomer was the trans.

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