In this work, we first present a new class of fluorescent synthetic macrocycle, named fluoren-triangle (FT), which we designed by creatively integrating the fluorene fluorophore into the resorcinarene backbone. Single-crystal analysis of FT revealed isosceles-triangle conformations accompanied by a layer-like molecular assembly in the solid state. Fluorescence experiments demonstrated its aggregation-induced emission character and tunable solid-state fluorescence emission, and per-methylated FT (MeFT) also exhibited an intriguing excitation-wavelength-dependent (Ex-De) capability with different emission color-switching processes. Significantly, the activated powders of per-hydroxylated FT (OHFT) and MeFT with both nonporous and amorphous features displayed remarkable potential in constructing adsorptive separation materials for CO₂ and CH₄ capture, affording good selectivities of 31/1 for CO₂/N₂ (by OHFT) and 8/1 for CH₄/CO₂ (by MeFT), respectively. The discovery of FT will provide new perspectives in constructing novel fluorescent macrocycles and functional photo-responsive materials, unleashing new inspirations in molecular sorbents for gas adsorption and separation.

在这项工作中，我们首先提出了一类新型荧光合成大环化合物，称为芴三角（FT），我们通过创造性地将芴荧光团整合到间苯二酚主链中来设计它。FT 的单晶分析揭示了等腰三角形构象，并伴有固态的层状分子组装体。荧光实验证明了其聚集诱导发射特性和可调谐固态荧光发射，全甲基化 FT (MeFT) 还表现出具有不同发射颜色切换过程的有趣的激发波长依赖 (Ex-De) 能力。值得注意的是，具有无孔和无定形特征的全羟基化 FT (OHFT) 和MeFT₂和 CH₄的吸附分离材料方面显示出巨大的潜力，对 CO₂/N₂（通过OHFT）和 8/1 对于 CH₄/CO₂（通过MeFT）。FT的发现将为构建新型荧光大环化合物和功能光响应材料提供新的视角，为气体吸附和分离的分子吸附剂带来新的灵感。