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1989 (2)
1Author    Jan Böm, G. Erd, Heppke, A. Ndreas RanftRequires cookie*
 Title    Synthese und ferroelektrische Eigenschaften chiraler Ester von 2,5-Diphenylpyrimidinen mit a-Fluorcarbonsäuren Synthesis and Ferroelectric Properties of 2,5-Diphenylpyrimidines with Different a-Fluorocarboxylic Acids  
 Abstract    Chiral esters of 2-[4-/?-hexylphenyl]-5-[4-hydroxyphenyl]pyrimidine and 2-[4-w-hexyloxy-phenyl]-5-[4-hydroxyphenyl]pyrimidine with four different a-fluorocarboxylic acids have been synthesized. The spontaneous polarization and the tilt angles in the smectic C* phase were m easured as a function of tem perature. All compounds exhibit wide range smectic C* phases, the highest values of the spontaneous polarization being about 400 nC/cm: . Additionally the spon­ taneous polarization in a higher ordered smectic phase was determ ined, the values ranging up to about 600 nC/cm2. The spontaneous polarization/tilt angle ratio strongly increases with decreasing tem perature. 
  Reference    Z. Naturforsch. 44b, 1127—1131 (1989); eingegangen am 6. März 1989 
  Published    1989 
  Keywords    Liquid Crystals, Smectic Liquid Crystals, Ferroelectric Properties, Chiral cc-Fluorocarboxylic Acid E sters, 2, 5-Diphenylpyrim idines 
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 TEI-XML for    default:Reihe_B/44/ZNB-1989-44b-1127.pdf 
 Identifier    ZNB-1989-44b-1127 
 Volume    44 
2Author    D. Ieter Fenske, Christina Ergezinger, Kurt DehnickeRequires cookie*
 Title    Crystal Structure of l,l-D ichloro-3,5- diphenyl-4-H-l,2.4,6-/.4-selenatriazine, SeCl2C2N 3H (C 6H 5)2  
  Reference    Z. Naturforsch. 44b, 857—8 (1989); eingegangen am 15. Februar 1989 
  Published    1989 
  Keywords    1, l-D ichloro-3, 5-diph en yl-4-H -l, 2, 46-Ä4-selenatriazine, Preparation, Crystal Structure 
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 TEI-XML for    default:Reihe_B/44/ZNB-1989-44b-0857_n.pdf 
 Identifier    ZNB-1989-44b-0857_n 
 Volume    44