Dimension-Tunable Supramolecular Organic Frameworks with Chiral Pore Channels for Selective Guest Encapsulation and Enhanced Circularly Polarized Luminescence

作者：Tiejun Li, Dian Niu, Jingdan Zhang, Guanghui Ouyang, Minghua Liu · 发表于：Journal of the American Chemical Society · 年份：2025 · DOI：10.1021/jacs.5c11407 · 被引用次数：23 · 研究领域：Metal-Organic Frameworks: Synthesis and Applications、Covalent Organic Framework Applications、Luminescence and Fluorescent Materials

Here, we report a dimension-tunable supramolecular organic framework (SOF) with chiral pore channels, which shows selective guest encapsulation and enhanced circularly polarized luminescence (CPL). SOFs from a chiral para-substituted bis-naphthalene bis-urea (PNU) are fabricated by both vapor diffusion crystallization and an antisolvent self-assembly approach, leading to the formation of one-dimensional (1D) micrometer-sized single crystal and two-dimensional (2D) plate-like and three-dimensional (3D) octahedral self-assembled microstructures, respectively. The similar permanent porosity of these dimension-tunable chiral SOFs is collectively proved by N 2 adsorption–desorption experiments, single-crystal structure, high-resolution transmission electron microscopy (HR-TEM), and density functional theory (DFT) calculations. By soaking octahedral SOFs in aqueous dye solutions, the chiral porous channels effectively absorb size-matched guest dyes and impart their chirality, leading to enhanced CPL with a dissymmetry factor of 1.6 × 10 –2 . This work provides insights for the efficient synthesis of chiral SOFs with pore channels from a single component, which also deepens our understanding of size-selective adsorption and chirality transfer in confined space, as well as the enhancement of circularly polarized luminescence.