Planar-Chiral Through-Space Conjugated Oligomers: Synthesis and Characterization of Chiroptical Properties
作者:Yasuhiro Morisaki、Kenichi Inoshita、Yoshiki Chujo
DOI:10.1002/chem.201402930
日期:2014.7.1
active through‐space conjugated oligomers, namely, a dimer, trimer, tetramer, and cyclic trimer, consisting of a planar‐chiral [2.2]paracyclophane skeleton were synthesized. In the ground state, observed similarities in the chiroptical properties of the oligomers were attributed to the equivalent orientations of two adjacent chromophores. In the excited state, the oligomers were folded into a form analogous
合成了具有光学活性的空间共轭低聚物,即由平面-手性[2.2]对环环烷骨架组成的二聚体,三聚体,四聚体和环状三聚体。在基态下,低聚物的手性的观察到的相似性归因于两个相邻发色团的等效取向。在激发态下,通过光激发将低聚物折叠成类似于单手螺旋的形式。分散溶液中的所有化合物均表现出强烈的圆偏振发光,且各向异性因子相对较大,约为10 -3。