Determining the Dynamic Sequence of Carbonyl Groups in a Rod-Coil Liquid Crystalline Oligomer Using Two-Dimensional Raman Correlation Spectroscopy

Journal of the Korean Chemical Society

Kabsang Jung¹  Keunok Han Yu¹  Soo-Chang Yu¹ 

关键词: 2D Raman Correlation Spectroscopy;    Liquid Crystalline Oligomer;    Dynamics;    Carbonyl Group;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

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 oC) the LC temperature (135 oC), countering conventional beliefs.

【 授权许可】

Unknown