3B07 アセチレンの重合触媒能をもつ新規キラルドーパントチタン錯体の合成と性質 (II)

概要

論文の詳細を見る
Chiroptical titanium complexes are expected not only to serve as a chiral dopant to nematic liquid crystals (LCs) to give an induced chirat nematic (N^*) phase, but also to play a role of catalyst itself. Here, we synthesized some kinds of chiroptical titanium complexes by introducing axially chiral or chirat center-containing ligands into titanium complexes. We found that these complexes induce chiral nematic (N^*) phase when dissolved in nematic LCs and they are catalytically active for acetylene polymerization. Positive or negative Cotton effect was observed in the region of π→π^* transition of polyene chain in circular dichroism (CD) spectra of the polyacetylene thin films. The result indicates that the polyacetylene chain is helically screwed by virtue of the chiral LC environment.
日本液晶学会の論文
1998-10-12