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Issue 43, 2010
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How much can an electric dipole stabilize a nematic phase? Polar and non-polar isosteric derivatives of [closo-1-CB9H10] and [closo-1,10-C2B8H10]

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Abstract

Replacement of a C–C fragment with an N+B fragment leads to pairs of isosteric non-polar/polar nematics with a difference in the calculated molecular dipole moment of about 12 D. Contrary to the expectations, the uniform increase of the dipole moment does not affect phase stability equally, and a strong dependence on the substituent structure is observed. For one of the polar derivatives (5b, µ = 20 D) a record high dielectric anisotropy (Δε = 113) was measured in dilute nematic solutions.

Graphical abstract: How much can an electric dipole stabilize a nematic phase? Polar and non-polar isosteric derivatives of [closo-1-CB9H10]− and [closo-1,10-C2B8H10]

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Publication details

The article was received on 30 Aug 2010, accepted on 06 Sep 2010 and first published on 28 Sep 2010


Article type: Communication
DOI: 10.1039/C0JM02876B
Citation: J. Mater. Chem., 2010,20, 9613-9615
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    How much can an electric dipole stabilize a nematic phase? Polar and non-polar isosteric derivatives of [closo-1-CB9H10] and [closo-1,10-C2B8H10]

    B. Ringstrand and P. Kaszynski, J. Mater. Chem., 2010, 20, 9613
    DOI: 10.1039/C0JM02876B

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