Condis Crystals of Small Molecules II. The Polymorphs of N, N'-bis(4-n-octyloxybenzal)-1,4-phenylenediamine (OOBPD)

Hans G. Wiedemann Mettler Instrumente AG, CH-8606, Greifensee, ZH, Switzerland

Janusz Grebowicz Department of Chemistry, Rensselaer Polytechnic Institute, Troy, New York, 12180, USA; Mettler Instrumente AG, CH-8606, Greifensee, ZH, Switzerland

Bernhard Wunderlich Department of Chemistry, Rensselaer Polytechnic Institute, Troy, New York, 12180, USA; Mettler Instrumente AG, CH-8606, Greifensee, ZH, Switzerland

Abstract

The high temperature transitions between 300 and 500 K of N,N'-bis(4-n-octyloxybenzal)-1,4-phenylenediamine are analyzed by scanning calorimetry, optical microscopy, light transmission measurement, thermomechanical analysis and X-ray diffraction. The prior assignment of mesophase structure K3/385.2/K2/388.2/K1/415.3/H'/422.2/G'/426.9/I/436.6/C/475.4/N/505.4/Melt (temperatures in K) has been extended by the suggestion that K1 to K3 are conformationally disordered crystals.

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Condis Crystals of Small Molecules II. The Polymorphs of N, N'-bis(4-n-octyloxybenzal)-1,4-phenylenediamine (OOBPD)

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Condis Crystals of Small Molecules II. The Polymorphs of N, N'-bis(4-n-octyloxybenzal)-1,4-phenylenediamine (OOBPD)

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