Bo Caiying, Fu Yiran, Li Miao, Hu Lihong, Zhang Meng, Song Fei, Zhou Yonghong
Institute of Chemical Industry of Forest Products, CAF; National Engineering Research Center for Low-Carbon Processing and Utilization of Forest Biomass, Key Lab. Of Biomass Energy and Material, Jiangsu Province, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing 210042, People's Republic of China.
College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, People's Republic of China.
Mater Horiz. 2025 Aug 11;12(16):6363-6372. doi: 10.1039/d5mh00551e.
The development of room temperature phosphorescence (RTP) in multi-stimulus-responsive shape memory materials for applications in information encryption and anti-counterfeiting presents a significant challenge. Here, we introduce a cardanol-based polymer system containing N-coordinated bicyclic boronic esters, which exhibit stable, long-lived RTP and respond to multiple stimuli, including heat, ultraviolet (UV), and infrared (IR) light. This is achieved through a well-designed copolymer structure that integrates rigidity and dynamic covalent networks by adjusting the N-coordination with the bicyclic boronic ester linkage, and the material can be engineered for self-healing and recyclability. The resulting cardanol-based RTP demonstrates ultralong afterglow emissions lasting up to 12 s under ambient conditions. Remarkably, it retains conspicuous RTP even immersed in HO, HCl and NaOH for four weeks, thanks to its 3D covalent network structure providing exceptional water and chemical resistance. Furthermore, its UV-responsive properties enable the cardanol-based RTP to function as a rewritable film for light printing. Leveraging the shape memory and adjustable phosphorescence performance, we developed a promising programmable 2D/3D anti-counterfeiting security system based on this cardanol-based RTP. This system combines phosphorescence and shape memory behaviors, advancing the development of multi-stimulus-responsive RTP systems based on cardanol, and offering promising applications in secure information storage and anti-counterfeiting technologies.
开发用于信息加密和防伪的多刺激响应形状记忆材料中的室温磷光（RTP）面临重大挑战。在此，我们引入了一种基于腰果酚的聚合物体系，该体系含有N配位的双环硼酸酯，表现出稳定、长寿命的RTP，并对多种刺激做出响应，包括热、紫外线（UV）和红外（IR）光。这是通过精心设计的共聚物结构实现的，该结构通过调整与双环硼酸酯键的N配位来整合刚性和动态共价网络，并且该材料可以设计成具有自愈性和可回收性。所得的基于腰果酚的RTP在环境条件下表现出长达12秒的超长余辉发射。值得注意的是，由于其三维共价网络结构提供了出色的耐水性和耐化学性，即使将其浸入水、盐酸和氢氧化钠中四周，它仍保留明显的RTP。此外，其对紫外线的响应特性使基于腰果酚的RTP能够用作光打印的可重写薄膜。利用形状记忆和可调节的磷光性能，我们基于这种基于腰果酚的RTP开发了一种有前景的可编程2D/3D防伪安全系统。该系统结合了磷光和形状记忆行为，推动了基于腰果酚的多刺激响应RTP系统的发展，并在安全信息存储和防伪技术中提供了有前景的应用。
