Liu Huan, Tian Aixiang, Liu Tao, Ying Jun
College of Chemistry and Materials Engineering, Bohai University, Jinzhou 121013, China.
College of Chemistry and Materials Engineering, Bohai University, Jinzhou 121013, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2025 Jan 15;325:125143. doi: 10.1016/j.saa.2024.125143. Epub 2024 Sep 16.
In recent years, stimulus responsive materials have received widespread attention. Under solvothermal conditions, three polyoxometalates-viologen organic-inorganic hybrid compounds were successfully constructed by combining a viologen ligand 1-(3-Nitro-benzyl)-[4,4']bipyridinyl-1-ium bromide (1,3-nibipy·Br) with octamolybdate, namely [Cu(1,3-nibipy)(HO)(β-MoO)]·2HO (1), [Cu(1,3-nibipy)(HO)(β-MoO)]·(β-MoO) (2) and (1,3-Hnibipy)·(β-MoO) (3). These three compounds can exhibit color changing properties under both light and electrical stimulation. Through characterizations of PXRD, FT-IR, UV-vis spectra, XPS, EPR, CV, and other tests, the photochromic and electrochromic properties of these three compounds are caused by the generation of viologen radicals. Compounds 1-3 have a rapid photoresponse efficiency and can be made into mixed matrix films for use as ultraviolet detectors. In addition, coated filter paper synthesized from acetonitrile and compounds can serve as an innovative erasable ink-free printing material medium, which is suitable for various erasable ink-free printing and anti-counterfeiting fields. We further investigated the electrochromic devices prepared from compounds 1-3, which achieved color change at a voltage of around -0.2 V and exhibited good stability after 500 cycles.
近年来，刺激响应材料受到广泛关注。在溶剂热条件下，通过将紫精配体1-(3-硝基苄基)-[4,4']联吡啶鎓溴化物(1,3-nibipy·Br)与八钼酸盐相结合，成功构建了三种多金属氧酸盐-紫精有机-无机杂化化合物，即[Cu(1,3-nibipy)(H₂O)(β-Mo₈O₂₆)]·2H₂O (1)、[Cu(1,3-nibipy)(H₂O)(β-Mo₈O₂₆)]·(β-Mo₈O₂₆) (2)和(1,3-H₂nibipy)·(β-Mo₈O₂₆) (3)。这三种化合物在光和电刺激下均能表现出颜色变化特性。通过粉末X射线衍射(PXRD)、傅里叶变换红外光谱(FT-IR)、紫外可见光谱(UV-vis)、X射线光电子能谱(XPS)、电子顺磁共振(EPR)、循环伏安法(CV)等测试表征，发现这三种化合物的光致变色和电致变色性能是由紫精自由基的产生引起的。化合物1-3具有快速的光响应效率，可制成混合基质膜用作紫外探测器。此外，由乙腈和化合物合成的涂层滤纸可作为一种创新的无墨可擦除打印材料介质，适用于各种无墨可擦除打印和防伪领域。我们进一步研究了由化合物1-3制备的电致变色器件，该器件在约-0.2 V的电压下实现了颜色变化，并且在500次循环后表现出良好的稳定性。
