近日，西北工业大学的黄维及其研究小组与南京工业大学的安众福等人合作并取得一项新进展。经过不懈努力，他们利用扭曲分子结构和强大相互作用的联合锁定效应实现双通道机械磷光。相关研究成果已于2024年4月8日在国际知名学术期刊《光：科学与应用》上发表。

本研究中，研究人员提出了一种创新的分子设计策略，旨在实现双通道机械磷光。通过将芳基膦氧化物基团巧妙地引入高度扭曲的分子框架中，成功地在刚性结构中增强了分子内和分子间的相互作用，进而实现了双通道机械发光，显著提升了超长磷光的性能。

进一步的研究揭示，通过稳固锁定这种高度扭曲的分子框架，分子内和分子间的相互作用对机械发光和超长磷光性能产生了实质性的增强效果。这项工作为开发新型智能响应发光材料提供了清晰的指导方向，有望在材料科学领域得到广泛应用。

据悉，有机机械发光材料具有双发射和超长磷光特性，在实时应力传感、压敏照明、先进安全标记技术和材料破损监测等方面具有重要的应用潜力。然而，由于分子设计策略不成熟和发光机制不明确，这些材料仍然很少被报道。

附：英文原文

Title: Dual-channel mechano-phosphorescence: a combined locking effect with twisted molecular structures and robust interactions

Author: Xie, Zongliang, Mao, Zhu, Wang, Hailan, Xiao, Yuxin, Zhang, Xiayu, Yu, Tao, An, Zhongfu, Huang, Wei

Issue&Volume: 2024-04-08

Abstract: Organic mechanoluminescence materials, featuring dual emission and ultralong phosphorescence characteristics, exhibit significant potential for applications in real-time stress sensing, pressure-sensitive lighting, advanced security marking techniques, and material breakage monitoring. However, due to immature molecular design strategies and unclear luminescence mechanisms, these materials remain rarely reported. In this study, we propose a valuable molecular design strategy to achieve dual-channel mechano-phosphorescence. By introducing the arylphosphine oxide group into a highly twisted molecular framework, enhanced intra- and intermolecular interactions could be achieved within rigid structures, leading to dual-channel mechanoluminescence with greatly promoted ultralong phosphorescence. Further investigations reveal the substantial boosting effect of intra- and intermolecular interactions on mechanoluminescence and ultralong phosphorescence properties by locking the highly twisted molecular skeleton. This work provides a concise and guiding route to develop novel smart responsive luminescence materials for widespread applications in material science.

DOI: 10.1038/s41377-024-01421-5

Source: https://www.nature.com/articles/s41377-024-01421-5