华东师范大学杨海波团队近日研究了一种稳定发光、快速结晶和酸刺激响应的有机自由基。2025年7月9日出版的《中国化学》杂志发表了这项成果。

研究组成功地设计并合成了吡啶修饰的三（2,4,6-三氯苯基）甲基（PyTTM）。PyTTM在丙酮中快速形成单晶。单晶x射线分析表明，分子平面性和多维分子间非共价相互作用是驱动其快速结晶的关键因素。与TTM相比，PyTTM的光稳定性显著增强。吡啶基团的引入使PyTTM具有可逆的酸碱响应性和良好的循环稳定性。

此外，三角形自由基配体能够与temed-Pd(NO₃)₂自组装成一维大环链。这项工作为结合高稳定性、快速结晶和酸碱刺激响应性的新型发光自由基提供了一种有前途的设计策略。

附：英文原文

Title: A Stable Luminescent, Rapidly Crystallized and Acid Stimulus-Responsive Organic Radical†

Author: Meng-Xiang Wu, Xin-Yi Wang, Lili Qiu, Yiming Yang, Bin Huang, Xiao-Li Zhao, Xueliang Shi, Hai-Bo Yang

Issue&Volume: 2025-07-09

Abstract: In this study, we successfully designed and synthesized a pyridine-modified tris(2,4,6-trichlorophenyl)methyl radical (PyTTM). PyTTM exhibited notably rapid single-crystal formation in acetone. Single-crystal X-ray analysis revealed that molecular planarity and multidimensional intermolecular non-covalent interactions were key factors driving its fast crystallization. Compared to TTM, PyTTM showed significantly enhanced photostability. The introduction of the pyridine group endowed PyTTM with reversible acid–base responsiveness and excellent cycling stability. Furthermore, the triangular radical ligand was able to self-assemble with temed-Pd(NO3)2 into a one-dimensional macrocyclic chain. This work offers a promising design strategy for novel luminescent radicals that combine high stability, rapid crystallization, and acid–base stimulus responsiveness.

DOI: 10.1002/cjoc.70161

Source: https://onlinelibrary.wiley.com/doi/10.1002/cjoc.70161