81Br NQR and 1H NMR of Ethylammonium Tetrabromomercurate (II) (C2H5NH3)2HgBr4: Phase Transition and Molecular Motion

2002 ◽  
Vol 57 (6-7) ◽  
pp. 369-374 ◽  
Author(s):  
H. Terao ◽  
Y. Furukawa ◽  
M. Hashimoto ◽  
K. Yamada ◽  
T. Okuda
Keyword(s):  
Phase Transition ◽  
1H Nmr ◽  
Molecular Motion ◽  
81Br Nqr

81Br NQR and 1H NMR of Guanidinium Hexabromoantimonate(V) [C(NH2)3]SbBr6: Phase Transition and Molecular Motion

2002 ◽  
Vol 57 (6-7) ◽  
pp. 399-402 ◽  
Author(s):  
Yoshihiro Furukawa ◽  
Hiromitsu Terao
Keyword(s):  
Phase Transition ◽  
Activation Energy ◽  
Temperature Dependence ◽  
1H Nmr ◽  
Room Temperature ◽  
Molecular Motion ◽  
Thermal Hysteresis ◽  
Temperature Behavior ◽  
H Nmr ◽  
81Br Nqr

Guanidinium hexabromoantimonate(V) [C(NH2)3]SbBr6 was prepared. It was black in color at room temperature and showed a tendency to turn yellow by loosing bromine in open air. Six 81Br NQRlines were observed at 77K.On heating, four of the six lines faded out around 200 K,while the remaining two lines could be observed up to room temperature. This temperature behavior suggests a preferential libration or reorientation around a pseudo C4 axis of the octahedral [SbBr6]- anion. DTA measurement revealed a small heat anomaly at Tc1 = 273 K (on heating), showing a thermal hysteresis, and a sharp and large anomaly at Tc2 = 314 K. The temperature dependence curve of 1H NMR T1 is characterized by a single minimum of 26 ms (32 MHz) near 280 K, which is assigned to the C3 reorientation of the planar [C(NH2)3]+ cations. Its activation energy ( a) is 43.3 kJ/mol

127I NQR and 1H NMR studies of 4-aminopyridinium tetraiodoantimonate(III); molecular motion and phase transition

2010 ◽  
Vol 198 (1-3) ◽  
pp. 93-101 ◽  
Author(s):  
Hiromitsu Terao ◽  
Yoshihiko Kai ◽  
Kazuyo Kita ◽  
Yoshihiro Furukawa
Keyword(s):  
Phase Transition ◽  
1H Nmr ◽  
Molecular Motion ◽  
Nmr Studies

127I NQR and 1H NMR studies of 4-aminopyridinium tetraiodoantimonate(III); molecular motion and phase transition

2010 ◽  
pp. 439-447
Author(s):  
Hiromitsu Terao ◽  
Yoshihiko Kai ◽  
Kazuyo Kita ◽  
Yoshihiro Furukawa
Keyword(s):  
Phase Transition ◽  
1H Nmr ◽  
Molecular Motion ◽  
Nmr Studies

Phase transition and molecular motion of cyclohexane confined in metal-organic framework, IRMOF-1, as studied by 2H NMR

2007 ◽  
Vol 443 (4-6) ◽  
pp. 293-297 ◽  
Author(s):  
Takahiro Ueda ◽  
Kenji Kurokawa ◽  
Hiroaki Omichi ◽  
Keisuke Miyakubo ◽  
Taro Eguchi
Keyword(s):  
Phase Transition ◽  
Molecular Motion ◽  
Metal Organic Framework ◽  
2H Nmr ◽  
Metal Organic ◽  
Organic Framework

scholarly journals 1H and13C NMR study of phase transition and molecular motion in ionic liquids forming lyotropic liquid-crystalline ionogels

2011 ◽  
Vol 51 (3) ◽  
pp. 212-220 ◽  
Author(s):  
Vytautas Balevičius ◽  
Lukas Džiaugys ◽  
Feliksas Kuliešius ◽  
Arūnas Maršalka
Keyword(s):  
Phase Transition ◽  
Ionic Liquids ◽  
Liquid Crystalline ◽  
Molecular Motion ◽  
1H And13c Nmr ◽  
Nmr Study

Phase Transition and Molecular Motion intrans-Azobenzene and Its Methyl Derivatives

1988 ◽  
Vol 57 (11) ◽  
pp. 4063-4064 ◽  
Author(s):  
Yasuo Ueda ◽  
Nobuo Nakamura ◽  
Hideaki Chihara
Keyword(s):  
Phase Transition ◽  
Molecular Motion ◽  
Methyl Derivatives
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