近日，河南理工大学李丽团队通过基态电荷转移实现光致变色与室温磷光的双通道光学解耦，用于无损防伪。2026年6月1日，该研究成果发表在《结构化学》杂志上。

先进的防伪系统需要同时具备用于安全认证的连续非破坏性读取能力以及动态响应特性，才能有效防止伪造。兼具光致变色与室温磷光（RTP）特性的材料，因其固有颜色和发光发射的动态变化，在高级防伪领域具有应用前景。然而，现有大多数室温磷光体系的一个关键局限在于：光致变色激活和室温磷光发射所需的激发光源相同，这会导致光致变色与磷光发射同时发生，从而抑制磷光信号，并阻碍连续非破坏性读取。

为突破这一局限，研究组提出了一种解耦策略，通过基态电荷转移（CT）将光致变色与室温磷光分离到独立的光学通道中。该策略在两种已报道的金属紫精化合物上得到了验证——它们的结构及窄的HOMO–LUMO能隙促进了高效的基态电荷转移，从而构建出一条独立的可见光激活室温磷光通道，而光致变色则仅对紫外光响应。这一突破成功解决了室温磷光材料中非破坏性读取的难题，从而满足了高级防伪系统的关键需求。

附：英文原文

Title: Dual-channel optical decoupling of photochromism and room-temperature phosphorescence via ground-state charge transfer for non-destructive anti-counterfeiting

Author: anonymous

Issue&Volume: 2026-06-01

Abstract: Advanced anti-counterfeiting systems require both continuous non-destructive readout for security certification and dynamic response capabilities to effectively prevent counterfeiting. Materials with dual photochromic and room temperature phosphorescence (PRTP) properties hold promise for advanced anti-counterfeiting, owing to the dynamic variation in both their inherent color and luminescent emission. However, a critical limitation in most existing PRTP systems lies in the identical excitation source required for both photochromism activation and RTP emission, leading to concurrent photochromism that suppresses phosphorescence and impedes continuous non-destructive readout. To address this limitation, this work proposes a decoupling strategy to separate photochromism and RTP into independent optical channels via ground-state charge transfer (CT). The strategy is validated by two reported metalloviologen compounds, whose structure and narrow HOMO–LUMO gap facilitate efficient ground-state CT, and thus create an independent visible-light-activated RTP pathway, while photochromism remains exclusively responsive to UV light. This breakthrough successfully resolves the issue of non-destructive readout in PRTP materials, thereby fulfilling a critical requirement for advanced anti-counterfeiting systems.

DOI: 10.1016/j.cjsc.2026.101008

Source: http://cjsc.ac.cn/cms/issues/1074