课题组的合作文章"In-Solution Intramolecular Through-Space Conjugations of Sterically Constrained Tetranaphthylethane"发表在《CCS Chem.》上！

原文链接：https://www.chinesechemsoc.org/doi/full/10.31635/ccschem.025.202405283

摘要：Intramolecular through-space conjugation (TSC) in nonconjugated luminogens has traditionally been overlooked in fluorophore design due to the assumption that active molecular motions in dilute solution disrupt the necessary through-space interactions. In this study, the photophysical properties of three molecules, namely 1,1,2,2-tetraphenylethane ( s-TPE), 2,2,2,2-tetranaphthylethane ( s-β-TNE), and 1,1,1,1-tetranaphthylethane ( s-α-TNE), were systematically investigated, challenging this long-held assumption. While s-TPE and s-β-TNE were emitted from isolated aromatic units (phenyl and naphthyl, respectively) in dilute solutions as expected, the sterically constrained s-α-TNE displayed a broad and redshifted emission arising from persistent intramolecular through-space interactions between isolated naphthalene rings in solution, as confirmed by experimental and theoretical analyses. Remarkably, this persistent in-solution TSC was modulated by temperature, where weakened TSC was observed at both low and high temperatures with blueshifted emission. The mechanistic insights deepen the understanding of through-space electronic interactions in sterically constrained fluorophores and provide a novel angle for future molecular designs.

引用：CCS Chem. 2025, DOI: 10.31635/ccschem.025.202405283