317351-89-6Relevant articles and documents
Liquid crystal imidazolium salts: Towards materials for catalysis and molecular electronics
Suisse, Jean-Moise,Douce, Laurent,Bellemin-Laponnaz, Stephane,Maisse-Francois, Aline,Welter, Richard,Miyake, Yasuo,Shimizu, Yo
, p. 3899 - 3905 (2008/03/14)
1,3-Bis(4-alkyloxyphenyl)-3H-imidazol-1-ium trifluoromethanesulfonates, alkyl = CH3(CH2)n-1, n = 8, 10, 12, 14 and 16, can be derived from the analogous 4-alkyloxyphenylamines. These imidazolium salts exhibit a lamellar liquid-crystal mesophase between 99°C and 191°C. The smectic-A phase was fully characterised by polarising optical microscopy, differential scanning calorimetry and X-ray diffraction. We report also the synthesis, lamellar crystal structure and catalytic activity of the PdII complex of the (deprotonated) carbene form of one of these salts. In addition, we measured the charged carrier mobilities in the mesophase. Wiley-VCH Verlag GmbH & Co. KGaA, 2007.
Synthesis and structure of 1,4-diazabutadiene liquid crystals
Zhao, Ke-Qing,Hu, Pin,Xu, Hong-Bo
, p. 801 - 808 (2007/10/03)
Nine 1,4-diazabutadiene compounds, Ar-N=C(R)-C(R)=N-Ar, R=H, Me; Ar= H2n+1CnO-C6H4, 2,4-(H9C4O)(Me)-C6H3 were synthesized and their liquid crystal properties were studied through thermal polarizing microscopy. The X-ray single crystal structure of compound 9 (Ar-N=C(H)-C(H)=N-Ar, Ar=2,4-(Me)(H9C4O)C6H3) was tested. It is a monoclinic crystal system, space group P21/C with the unit cell parameters: a=7.0703(3)A, b=8.674(4)A, c=18.3115(8)A, β =95.392(1)°. V=1114.57(9)A3, z=2, Dc=1.134 Mg/m3, R=0.0490,Rw=0.1237.