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4,4′-Distyrylazobenzol als Mesogen (1992)

Kosteyn, Frank ; Zerban, Georg ; Meier, Herbert

Weinheim : Wiley-Blackwell

Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 893-897

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ISSN: 0009-2940

Keywords: 4,4′-Distyrylazobenzenes, alkoxy- ; Siegrist Reaction ; Liquid crystals ; Chemistry ; Inorganic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: 4,4′-Distyrylazobenzene as MesogenFrom 3,4-dihydroxybenzaldehyde (1) the tetraalkoxy-substituted 4,4′-distyrylazobenzenes (E,E,E)-5a - c are synthesized. A similar reaction sequence leads from ethyl 3,4,5-trihydroxy-benzoate (6) to the hexaalkoxy-substituted 4,4′-distyrylazobenzenes (E,E,E)-11 b, c. With the exception of 5a all products show thermotropic LC properties. Smectic phases have been characterized by polarizing microscopy and by differential scanning calorimetry.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/cber.19921250421

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