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Determining the Dynamic Sequence of Carbonyl Groups in a Rod-Coil Liquid Crystalline Oligomer Using Two-Dimensional Raman Correlation Spectroscopy
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 Title & Authors
Determining the Dynamic Sequence of Carbonyl Groups in a Rod-Coil Liquid Crystalline Oligomer Using Two-Dimensional Raman Correlation Spectroscopy
Jung, Kab-Sang; Yu, Soo-Chang; Han Yu, Keon-Ok;
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 Abstract
We investigated the order of local movement of functional groups (-C(=O)O) in a liquid crystalline (LC) oligomer (12-4) using 2D Raman correlation spectroscopy. The results suggest that the free carbonyl near the ethyl terminal group moved first, followed by the hydrogen-bonded group. The free carbonyl group between the biphenyl groups rarely moved. Interestingly, 2D sample-to-sample correlation spectroscopy (2D STSCS) revealed that some of the carbonyl modes started to move at far below (50) the LC temperature (135), countering conventional beliefs.
 Keywords
2D Raman Correlation Spectroscopy;Liquid Crystalline Oligomer;Dynamics;Carbonyl Group;
 Language
Korean
 Cited by
1.
Progress in two-dimensional (2D) correlation spectroscopy, Journal of Molecular Structure, 2006, 799, 1-3, 2  crossref(new windwow)
2.
Two-dimensional hetero-spectral correlation fluorescence-Raman spectroscopy for a thermotropic liquid-crystalline oligomer, Vibrational Spectroscopy, 2009, 51, 1, 11  crossref(new windwow)
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