Thermodynamic-Dominated Stereoselective Gridization of Molecular Nanolinkage Based on Fluorenes
Ying Wei, Shasha Wang, Linghai Xie, Xiaoyan Li, Dongqing Lin, Y.‐C. XU, Yang Li, Ping Zhou, Aizhong Peng, Hongjian Wang, Yongxia Yan, Wen-jing Shi
Abstract
Abstract The path-selectivity and stereoselectivity of gridization pathways into fluorene-based drawing hand grids (DHGs-F) are precisely modulated through tuning acid conditions and side-chain effects. BF3·OEt2 supports the realization of the gridization path (rac-DHG1-F, yield: 82%, meso-DHG1-F, yield: 11%). On the contrary, CF3SO3H will lead to the enhancements in polymerization pathways (about 85% yield). When the side chain is a methoxyl group, rac-DHG1-F and meso-DHG1-F will be obtained. However, when the side chain is a group without an oxygen atom, only rac-DHGs-F can be obtained (de = 100%). Moreover, through excitonic physical properties, rac-DHGs-F exhibits a more π-electronic delocalization, potentially serving as the intriguing tactic strategy to modulate the optoelectronic properties.