Han Pengbo, Xu He, Zhang Guiquan, Qin Anjun, Tang Ben Zhong
State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, Center for Aggregation-Induced Emission, AIE Institute, South China University of Technology, Guangzhou, 510640, China.
Center for Aggregation-Induced Emission, AIE Institute, South China University of Technology, Guangzhou, 510640, China.
Angew Chem Int Ed Engl. 2024 Jul 22;63(30):e202406381. doi: 10.1002/anie.202406381. Epub 2024 Jun 21.
Energy conversion, particularly light to heat conversion, has garnered significant attention owing to its prospect in renewable energy exploitation and utilization. Most previous efforts have focused on developing organic photothermal materials for low-temperature applications, whereas the importance of simplifying the preparation methods of photothermal materials and enhancing their maximum photothermal temperature have been less taken. Herein, we prepare an organic near-infrared (NIR) photothermal material namely ATT by a spontaneous [2+2] cycloaddition-cycloreversion reaction. In addition to the solution-based method, ATT could also be readily preapred by ball milling in a high yield of 90 % in just 15 min. ATT powder exhibits a broad absorption extending beyond 2000 nm, excellent processability, and thermal stability. Remarkably, ATT powder can reach an unprecedently temperature as high as 450 °C while maintaining excellent photostability upon photoirradiation. Leveraging its extraordinary photothermal and processable properties, ATT was used in the high-temperature applications, such as photo-ignition, photo-controlled metal processing and high-temperature shape memory, all of which offer spatiotemporal control capabilities. This work provides a new approach to prepare organic photothermal materials with high temperatures, and pave the way for their applications in extreme environments.
能量转换，特别是光热转换，因其在可再生能源开发与利用方面的前景而备受关注。此前的大多数研究都集中在开发用于低温应用的有机光热材料，而简化光热材料的制备方法并提高其最高光热温度的重要性却较少受到关注。在此，我们通过自发的[2+2]环加成-环化逆转反应制备了一种有机近红外（NIR）光热材料，即ATT。除了基于溶液的方法外，通过球磨也能轻松制备ATT，在仅15分钟内就能以90%的高产率得到。ATT粉末具有超过2000nm的宽吸收范围、优异的加工性能和热稳定性。值得注意的是，ATT粉末在光照射下能达到高达450°C的前所未有的温度，同时保持优异的光稳定性。利用其非凡的光热和可加工性能，ATT被用于高温应用，如光点火、光控金属加工和高温形状记忆，所有这些都提供了时空控制能力。这项工作为制备高温有机光热材料提供了一种新方法，并为其在极端环境中的应用铺平了道路。
