iron(II) or zinc(II) ions, however, a dramatic loss in the diastereoselectivity of the self-assembly of dinuclear triple-stranded helicates was observed as a result of increasing spacer length. In the case of zinc(II), the self-assembly processes were even found to be nonselective with regard to the composition of the helicates.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
报道了一系列对映体纯双(螯合)
配体的合成和自组装行为。
配体在 BINOL 核心和作为螯合实体的两个联
吡啶基团之间的间隔单元中有所不同,并且发现
配体经历完全非对映选择性自组装成具有
银(I)盐的双核双链螺旋,如核磁共振和 CD 光谱和ESI 质谱。然而,在与
铁 (II) 或
锌 (II) 离子配位后,由于间隔长度增加,观察到双核三链螺旋自组装的非对映选择性显着丧失。在
锌 (II) 的情况下,甚至发现自组装过程对螺旋体的组成是非选择性的。 (© Wiley-
VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)