An Unconventional Approach to Induce Liquid-Crystalline Phases of Triazine-Based Dendrons by Breaking Their Self-Assembly into Dimers.
Three triazine-based dendrons (1 a-c) were successfully prepared in 70-83 % yields. These newly prepared dendrons are found to be liquid crystalline (LC). Computational investigations on molecular conformations and dipoles of triazine-based dendrons reveal that the substituent on the central triazine unit interrupts strong dipole or H-bond interactions to avoid dimeric formation. The obtained dendrons, not favouring self-assembly into dimers but showing LC behaviours, provides evidence for an approach contrary to the conventional method of inducing LC behaviours of dendrons by dimer or trimer formation, mostly through H-bond interactions.
Department of Applied Chemistry, National Chi Nan University, No.1 University Rd., Puli, Nantou, Taiwan 545 (Taiwan). lilai@ncnu.edu.tw.
Long-Li
LL
Lai
Department of Applied Chemistry, National Chi Nan University, No.1 University Rd., Puli, Nantou, Taiwan 545 (Taiwan).
Jei-Way
JW
Hsieh
Department of Applied Chemistry, National Chi Nan University, No.1 University Rd., Puli, Nantou, Taiwan 545 (Taiwan).
Yung-Hao
YH
Chang
Department of Applied Chemistry, National Chi Nan University, No.1 University Rd., Puli, Nantou, Taiwan 545 (Taiwan).
Ming-Yu
MY
Kuo
Material and Chemical Research Laboratories, Industrial Research Institute, Hsinchu, Taiwan 300 (Taiwan).
Kung-Lung
KL
Cheng
Material and Chemical Research Laboratories, Industrial Research Institute, Hsinchu, Taiwan 300 (Taiwan).
Shih-Hsien
SH
Liu
No.101 Hsin-Ann Rd., HsinChu Science Park, Hsinchu, Taiwan 300 (Taiwan).
Jey-Jau
JJ
Lee
Department of Chemistry, Tamkang University, Tamsui, Taiwan 251 (Taiwan). hhsu@mail.tku.edu.tw.
Hsiu-Fu
HF
Hsu
columnar; dendrons; self-assembly; symmetry-breaking; triazine