传统的油墨打印具有方便快捷的优势，但打印过程中墨水或碳粉的大量使用对人体和环境造成了不可忽视的危害。基于激光的高能粒子特性和光热辐射热效应，利用激光欠焦和聚焦两种工作模式，可实现激光无墨打印和微区加工。本文报道了一种基于羟基磷灰石的“有机-无机-有机”三明治结构多功能纸，并利用激光的光热辐射效应使功能纸表层有机材料——纤维素纤维表面温度升高，实现表层均匀碳化，夹层无机材料——羟基磷灰石阻挡能量继续传导防止纸张烧穿，以此来达到无墨打印的效果。基于激光烧蚀的无墨打印，能够显著降低打印成本，有利于激光烧蚀打印技术的推广。此外，采用激光烧蚀打印技术作用于功能纸上的打印效果具有稳定、绿色环保等特点，在档案存储用纸、食品包装用纸和后天致盲患者阅读等方面具有广泛的应用。

A novel viologen-based photochromic coordination polymer, namely [Zn(CV)_0.5(BDC)(H₂O)]·2H₂O (1), has been successfully constructed via solvothermal self-assembly of Zn²⁺ ions with the 1, 1′-bis(2-carboxyethyl)-4, 4′-bipyridinium ((H₂CV)²⁺) as a photo-responsive functional unit and terephthalic acid (H₂BDC) as an auxiliary bridging ligand. Single-crystal X-ray diffraction analysis reveals that complex 1 features a 1D chain-like framework. Upon light irradiation, complex 1 exhibited a distinct photo-responsive color-changing behavior, transforming from colorless to blue. The blue-colored sample gradually faded and reverted to its original colorless state upon being placed in a dark environment at room temperature, demonstrating excellent reversible photochromic properties. On the basis of its photochromic performance, the application of this complex in ink-free printing has been explored. Furthermore, complex 1 emitted blue light under UV irradiation in a dark environment, revealing favorable photoluminescent characteristics. In addition, complex 1 possessed multiple photoswitchable properties.