electronic properties of these compounds. At the same time, conformational changes can also result in a folded structure that shows helical chirality. Using D‐camphor as a chiral building block, we have designed a high‐yielding, iterative synthesis of monodisperse, optically pure cis‐oligodiacetylenes (ODAs). cis‐ODAs up to the tridecamer have been formed, which is the longest monodisperse cis‐ODA reported to
聚和低聚二
乙炔(
PDA和
ODA)的共轭骨架中的构象变化在确定这些化合物的电子性质中起着重要作用。同时,构象变化也可导致显示出螺旋手性的折叠结构。使用D-
樟脑作为手性结构单元,我们设计了单分散,光学纯的顺式-寡聚二
乙炔(
ODA)的高产率迭代合成。形成了一直到tridecamer的顺式-
ODA,这是最长的单分散顺式‐
ODA迄今已报告。UV / Vis光谱表明,THF中的有效共轭长度很大,这很可能是该溶剂中线性,平面构象的结果。从THF浇铸到HO
PG上的九聚体的高分辨率STM / A
FM测量显示出线性结构。在i PrOH中,基于强烈的CD响应,圆二色性(CD)光谱表明具有至少9个D-
樟脑单元的
ODA的手性聚集体的形成。