13C-NMR Spin Lattice Relaxation Time Observation on the Smectic A and Smectic C*Phases of a Chiral Smectic Liquid Crystal, (S)-4-(1-methylhexyloxycarbonyl)phenyl 4'-octyloxybiphenyl-4-carboxylate

2005 ◽  
Vol 44 (5A) ◽  
pp. 3130-3133 ◽  
Author(s):  
Koji Miyayama ◽  
Yoshitaka Shikayama ◽  
Aya Iwahori ◽  
Takuhei Nose ◽  
Kazuyuki Hiraoka
Keyword(s):  
Relaxation Time ◽  
Liquid Crystal ◽  
Lattice Relaxation ◽  
Lattice Relaxation Time ◽  
Spin Lattice Relaxation ◽  
Spin Lattice ◽  
Smectic A ◽  
Smectic C ◽  
Smectic Liquid Crystal ◽  
Time Observation

Proton Spin-Lattice Relaxation Study of Order Fluctuations Above The Smectic A-Isotropic Transition in a Liquid Crystal

1974 ◽  
Vol 52 (14) ◽  
pp. 1331-1335 ◽  
Author(s):  
Ronald Y. Dong ◽  
M. Wiszniewska ◽  
E. Tomchuk ◽  
E. Bock
Keyword(s):  
Relaxation Time ◽  
Liquid Crystal ◽  
Effective Viscosity ◽  
Lattice Relaxation ◽  
Lattice Relaxation Time ◽  
Proton Spin ◽  
Spin Lattice Relaxation ◽  
Isotropic Phase ◽  
Spin Lattice ◽  
Smectic A

The proton spin-lattice relaxation time T1 in the isotropic phase of the smectic A liquid crystal diethylazoxybenzoate was measured at several Larmor frequencies in the range from 5 to 60 MHz. The frequency dependent T1 at 25 °C above the smectic A-isotropic phase transition (Tc) is attributed to molecular diffusion. The critical temperature dependent (T1)cf, the spin-lattice relaxation time due to critical order fluctuations, at 5 MHz can be understood by assuming that the effective viscosity has a critical temperature behavior just above Tc. It was deduced that the effective viscosity diverges as ξ2 in the mean field approximation, where ξ is a coherence length describing the short range order.

Chirality and Molecular Dynamics of Smectic Compound Studied by13C-NMR Spin-Lattice Relaxation Time Observation

2008 ◽  
Vol 364 (1) ◽  
pp. 129-135 ◽  
Author(s):  
Kazuyuki Hiraoka ◽  
Aya Iwahori ◽  
Hitomi Shiroshita ◽  
Hideshi Hara ◽  
Masato Nanamiya ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Relaxation Time ◽  
Lattice Relaxation ◽  
Lattice Relaxation Time ◽  
Spin Lattice Relaxation ◽  
Spin Lattice Relaxation Time ◽  
Spin Lattice ◽  
Time Observation

NUCLEAR SPIN-LATTICE RELAXATION TIME IN TIN

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-1215-C6-1216
Author(s):  
H. Ahola ◽  
G.J. Ehnholm ◽  
S.T. Islander ◽  
B. Rantala
Keyword(s):  
Relaxation Time ◽  
Nuclear Spin ◽  
Lattice Relaxation ◽  
Lattice Relaxation Time ◽  
Spin Lattice Relaxation ◽  
Spin Lattice Relaxation Time ◽  
Spin Lattice ◽  
Nuclear Spin Lattice Relaxation
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