Effect of hydrogen-bonded supramolecular assembling on liquid crystal properties of imidazole-containing azomethines and their chelates with copper(II)

Oleg N. Kadkin, Jigeon Tae, Eun Ho Kim, So Yeon Kim, Moon Gun Choi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A series of imidazole-containing rod-like Schiff's bases and their ionic copper(II) chelates with various lengths of the terminal alkyl chain containing 6, 8, 10, 12, 14 and 16 carbon atoms have been synthesised. The synthesised compounds were characterised by elemental analyses, 1H NMR, IR and UV-vis and mass spectroscopies. Thermotropic smectic C mesophases in the ligands and smectic A mesophases in the copper(II) complexes were identified using POM, DSC and small-angle XRD scattering methods. X-ray diffraction patterns of the prepared imidazole imines indicate to supramolecular self-assembled structures in the liquid crystal state, which are formed by means of intermolecular hydrogen bonds. It was established that both liquid crystal arrangement and supramolecular assemblies in ligands disappeared near 190°C, mainly regardless of the lengths of the terminal alkyl chains. Contrary, assembling of the copper(II) complexes into supramolecular bilayers occurs near 200°C, which causes their transition to a smectic A mesophase.

Original languageEnglish
Pages (from-to)1-12
Number of pages12
JournalSupramolecular Chemistry
Volume22
Issue number1
DOIs
Publication statusPublished - 2010 Jan 1

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Liquid Crystals
Copper
Hydrogen
Ligands
Imines
Schiff Bases
Diffraction patterns
Hydrogen bonds
Carbon
Nuclear magnetic resonance
imidazole
Spectroscopy
Scattering
X ray diffraction
Atoms

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

Kadkin, Oleg N. ; Tae, Jigeon ; Kim, Eun Ho ; Kim, So Yeon ; Choi, Moon Gun. / Effect of hydrogen-bonded supramolecular assembling on liquid crystal properties of imidazole-containing azomethines and their chelates with copper(II). In: Supramolecular Chemistry. 2010 ; Vol. 22, No. 1. pp. 1-12.
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Effect of hydrogen-bonded supramolecular assembling on liquid crystal properties of imidazole-containing azomethines and their chelates with copper(II). / Kadkin, Oleg N.; Tae, Jigeon; Kim, Eun Ho; Kim, So Yeon; Choi, Moon Gun.

In: Supramolecular Chemistry, Vol. 22, No. 1, 01.01.2010, p. 1-12.

Research output: Contribution to journalArticle

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