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Issue 2, 2008
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Metal-directed columnar phase formation in tetrahedral zinc(II) and manganese(II) metallomesogens

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Abstract

New, non-discoid M(II) complexes [MCl2(L)] {M = Mn, Zn; L = 2,6-diformyl-4-methylphenolbis[3′,4′,5′-tris(hexadecyloxy)phenylimine]} have been prepared and shown to exhibit columnar mesophases, the nature of which was found to be metal-dependent. As analysed by DSC and small-angle X-ray diffraction experiments, the complex [ZnCl2(L)] exhibits a single mesophase with rectangular symmetry (Colr) between 46 and 145 °C, whereas the Mn(II) analogue [MnCl2(L)] displays a purely hexagonal mesophase (Colh) phase between 55 and 285 °C. By combining these results with those obtained from dilatometry, a model for the molecular organisation within the columnar mesophases is proposed. The single-crystal X-ray structure of the related complex [Zn(NO3)(L′)2]NO3·3MeOH {L′ = 2,6-diformyl-4-methylphenolbis[3′,4′,5′-tris(methoxy)phenylimine]} has been determined and supports the proposed mode of binding of the ligand to the metal via only one imine and a phenol.

Graphical abstract: Metal-directed columnar phase formation in tetrahedral zinc(ii) and manganese(ii) metallomesogens

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Publication details

The article was received on 13 Jul 2007, accepted on 13 Aug 2007 and first published on 25 Sep 2007


Article type: Paper
DOI: 10.1039/B710745E
New J. Chem., 2008,32, 297-305

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    Metal-directed columnar phase formation in tetrahedral zinc(II) and manganese(II) metallomesogens

    F. Morale, R. L. Finn, S. R. Collinson, A. J. Blake, C. Wilson, D. W. Bruce, D. Guillon, B. Donnio and M. Schröder, New J. Chem., 2008, 32, 297
    DOI: 10.1039/B710745E

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