Anisotropic compounds having negative DC anisotropy and improved photochemical stability have the formula (1) given in patent claim 1; none of the benzene rings present in the molecule (1) is bonded directly to two oxygen atoms, as a result of which quinoidal bonding states which reduce the photochemical stability of anisotropic compounds in the case of benzene rings with two lateral nitrile groups are excluded.
具有负直流畸变和改善光
化学稳定性的各向异性化合物具有专利申请1中给出的公式(1); 分子(1)中没有任何苯环直接与两个氧原子结合,因此在具有两个侧面腈基的苯环的情况下会减少各向异性化合物的光
化学稳定性的喹诺状键态被排除。