Supramolecular liquid crystals with hydrogen-bonding self-assembled T-shaped mesogens

Chemistry Letters

Volumn , Issue 11, 2001, Pages 1156-1157

  Chen, Dongzhong ^a   Wan, Lei ^a   Fang, Jianglin ^a   Yu, Xuehai ^a  

^a NANJING UNIVERSITY   (China)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0035541220     PISSN: 03667022     EISSN: None     Source Type: Journal    
DOI: 10.1246/cl.2001.1156     Document Type: Article

References (15)

1. S. Berg, V. Krone, and H. Ringsdorf, Makromol. Chem., Rapid Commun., 7, 381 (1986).
2. Z. Li, C. Ning, S. Zheng, S. Zhang, S. Cao, D. Zhang, and Q. F. Zhou, Macromolecules, 32, 7040 (1999).
3. T. Kato, Struct. Bond., 96, 95 (2000).
4. D. Goldmann, R. Dietel, D. Janietz, C. Schmidt, and J. H. Wendorff, Liq. Cryst., 24, 407 (1998).
5. C. Vicent, S. C. Hirst, F. Garcia-Tellado, and A. D. Hamilton, J. Am. Chem. Soc., 113, 5466 (1991).
6. S. J. Geib, C. Vicent, E. Fan, and A. D. Hamilton, Angew. Chem., Int. Ed. Engl., 32, 119 (1993).
7. T. Kato, Y. Kubota, M. Nakano, and T. Uryu, Chem. Lett., 1995, 1127.
8. T. Kato, G. Kondo, and H. Kihara, Chem. Lett., 1997, 1143.
9. T. Kato, M. Nakano, T. Moteki, T. Uryu, and S. Ujiie, Macromolecules, 28, 8875 (1995).
10. T. Kato, M. Ogasawara, and S. Ujiie, Kobunshi Ronbunshu, 56, 410 (1999).
11. The complexes were prepared by slow evaporation of the 1:1 molar ratio mixtures from 2wt% pyridine solution.
12. Compound 2a was commercially available from Shanghai Chemical Reagents Company, recrystallized from ethanol, mp 185 °C. Compound 2b was synthesized according to literature (B. Jones, J. Chem. Soc., 1935, 1874), which showed nematic liquid crystal between 106.2 °C and 154.8 °C on heating. Elemental analysis (EA) for 2b: C 70.32% (calc. 70.24), H 8.27% (8.16). Compound 2c was prepared by a Schotten - Baumann reaction between 4-methoxybenzoyl chloride and 4-hydroxybenzoic acid, and showed nematic liquid crystal between 218.8 °C and 265.7 °C on heating. EA for 2c: C 65.98% (calc. 66.17), H 4.44% (4.44). The thermal transition temperatures of 2c are in good agreement with Zhou et al.'s results (Z. Li, Y. Guo, C. Zhang, and Q. F. Zhou, Acta Polym. Sinica, 1995, 414).
13. Compound 2a was commercially available from Shanghai Chemical Reagents Company, recrystallized from ethanol, mp 185 °C. Compound 2b was synthesized according to literature (B. Jones, J. Chem. Soc., 1935, 1874), which showed nematic liquid crystal between 106.2 °C and 154.8 °C on heating. Elemental analysis (EA) for 2b: C 70.32% (calc. 70.24), H 8.27% (8.16). Compound 2c was prepared by a Schotten - Baumann reaction between 4-methoxybenzoyl chloride and 4-hydroxybenzoic acid, and showed nematic liquid crystal between 218.8 °C and 265.7 °C on heating. EA for 2c: C 65.98% (calc. 66.17), H 4.44% (4.44). The thermal transition temperatures of 2c are in good agreement with Zhou et al.'s results (Z. Li, Y. Guo, C. Zhang, and Q. F. Zhou, Acta Polym. Sinica, 1995, 414).
14. D. W. Bruce, D. A. Dunmur, E. Lalinde, P. M. Maitlis, and P. Styring, Liq. Cryst., 3, 385 (1988).
15. L. J. Yu and J. S. Pan, Liq. Cryst., 14, 829 (1993).