Citation: Hai Quan Zhang, An Lei Qin. Tuning the helical twisting power of nematic liquid crystals induced by chiral 1, 2-propanediol derivatives using varied substituents[J]. Chinese Chemical Letters, ;2012, 23(1): 37-40. doi: 10.1016/j.cclet.2011.09.019 shu

Tuning the helical twisting power of nematic liquid crystals induced by chiral 1, 2-propanediol derivatives using varied substituents

State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China

Received Date: 13 June 2011

Fund Project: This work was supported in part by the National Natural Science Foundation of China (No. 51173155) and the Hebei Province Science Foundation of China (No. E2010001182).

In this study, a novel series of chiral 1, 2-propanediol derivatives with different electron-donating and electron-withdrawing groups were synthesized and characterized by FT-IR, ¹H NMR. The helical twisting properties of all the chiral dopants were investigated by doping the chiral dopants into a nematic liquid crystal host (SLC-1717). The results indicate that the donor-acceptor electron effect have a prominent influence on helical twisting property of the chiral nematic phase induced by the chiral dopants. Introducing electron-withdrawing groups into the terminal ends of chiral 1, 2-propanediol can decrease the absolute values of the helical twisting power. In addition, the helix inversion temperatures of the induced chiral nematic phase are variational with the change of terminal groups.
- Chiral dopants,
- Chiral nematic phase,
- Helical twisting power,
- Electron-donating group,
- Electron-withdrawing group
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