Anticlinic smectic phase formed by calamitic hydrazide derivatives with terminal hydroxyl group.
In: Liquid Crystals, Jg. 38 (2011-10-01), Heft 10, S. 1227-1237
academicJournal
Zugriff:
A new series of liquid crystalline hydrazide derivatives N-4-(alkoxyphenyl)-N'-4-[(4-hydroxyphenyl)azophenyl] benzohydrazide (BNB-n, n = 8, 12, 14) was designed and synthesised. Based on the results of variable temperature 1H NMR and FT-IR spectroscopy, a supramolecular assembly motif of BNB-n through both axial intermolecular hydrogen bonds between hydroxyl groups and lateral hydrogen bonds between hydrazide groups was proposed. Interestingly, BNB-n (n = 12, 14) with longer terminal chains displayed anticlinic bilayer smectic C mesophase (SmC2a). In order to reveal the effect of axial hydrogen bonding between hydroxyl groups on the formation of this unique mesophase, the hydroxyl group was replaced by a methoxy group to form N-4-(alkoxyphenyl)-N'-4-[(4-methoxyphenyl)azophenyl] benzohydrazide (BNBC-n, n = 12, 14). However, BNBC-n showed synclinic monolayer smectic C (SmCs) features, suggesting that the hydroxyl groups in BNB-n have an important role in the formation of anticlinic molecular packing in the smectic layers. [ABSTRACT FROM AUTHOR]
Titel: |
Anticlinic smectic phase formed by calamitic hydrazide derivatives with terminal hydroxyl group.
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Autor/in / Beteiligte Person: | Ran, Xia ; Wang, Haitao ; Zhang, Peng ; Bai, Binglian ; Zhao, Chengxiao ; Zhang, Qixian ; Liu, Hongyu ; Yu, Zhixin ; Li, Min |
Zeitschrift: | Liquid Crystals, Jg. 38 (2011-10-01), Heft 10, S. 1227-1237 |
Veröffentlichung: | 2011 |
Medientyp: | academicJournal |
ISSN: | 0267-8292 (print) |
DOI: | 10.1080/02678292.2011.604140 |
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