909280-05-3Relevant articles and documents
O -phenylene octamers as surface modifiers for homeotropic columnar ordering of discotic liquid crystals
Kajitani, Takashi,Suna, Yuki,Kosaka, Atsuko,Osawa, Terutsune,Fujikawa, Shigenori,Takata, Masaki,Fukushima, Takanori,Aida, Takuzo
, p. 14564 - 14567 (2013)
Large-area homeotropic columnar ordering of π-conjugated discotic liquid crystals (LCs) is crucial for certain device applications but generally hard to achieve. Here we report polymeric o-phenylene octamer poly-1 and its monomer 1 as the first surface modifiers for homeotropic columnar order of a variety of discotic LCs up to a macroscopic length scale. Their octameric o-phenylene parts are known to fold helically into a cylinder that is reminiscent of a π-stacked column of discotic LCs. Through-view X-ray diffraction patterns of 1 suggested that this molecule adheres to the glass substrate and directs its cylindrical axis perpendicular to the glass surface. This "face-on" orientation likely nucleates the homeotropic columnar order of discotic LC materials.
Solid-phase synthesis of quinol fatty alcohols, design of N/O-substituted quinol fatty alcohols and comparative activities on axonal growth
Hanbali, Mazen,Bagnard, Dominique,Luu, Bang
, p. 3917 - 3920 (2007/10/03)
Following the promising activity of Q2FA15 on axonal growth, two new series of N/O-substituted QFAs were synthesized, based on a SN2-type reaction. O-alkylated QFA bearing 14 carbon atoms on the side chain (n = 14) shows a very potent activity on axonal growth though lowered when compared to Q2FA15. While O-alkylation allows good retention of the biological activity, N-alkylation abolishes it nonetheless. A solid-phase-supported synthesis of Q2FA15 allowing the conception of new hybrid compounds is also described.