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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A series of host-guest coordination polymers containing viologens: syntheses, crystal structures, thermo/photochromism and factors influencing their thermo/photochromic behaviors
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A series of host-guest coordination polymers containing viologens: syntheses, crystal structures, thermo/photochromism and factors influencing their thermo/photochromic behaviors

机译：含有Viologens的一系列宿主 - 客体协调聚合物：合成，晶体结构，热/光学变色和影响其热/光致变色行为的因素

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摘要

Responsive molecular chromic materials have shown potential applications in molecular optical switches and sensor devices as they undergo reversible colour changes upon application of external stimuli. Herein, six host-guest coordination polymers 1-6 and one organic supramolecular compound 7 containing viologens have been synthesized under hydrothermal conditions. Compound 1 shows thermochromic behavior with a colour change from green to blue upon heating at 150 degrees C in air. Compounds 3, 4 and 7 display photochromic behaviors with a colour change from pale yellow to green under UV light, visible light or sunlight. The relationship between their structures and chromic behaviors has been discussed. Thermo/photochromic mechanisms have been investigated by infrared spectroscopy, powder X-ray diffraction analysis, UV-vis absorption spectroscopy, electron paramagnetic resonance spectroscopy, and X-ray photoelectron spectroscopy. The results demonstrate the generation of viologen radicals caused by thermo/photo-induced electron transfer. It is found that compound 4 can be used as an inkless and erasable printing medium. In addition, compounds 3, 4, and 7 can be used as anti-counterfeiting materials for QR codes. Our findings demonstrate the possibility of applying thermo/photochromic coordination polymers in molecular devices.
机译：响应性分子铬材料在分子光开关和传感器装置中示出了潜在的应用，因为它们在应用外部刺激时经过可逆的颜色变化。在此，在水热条件下已经合成了含有VIOLOGENE的六个宿主客观协调聚合物1-6和一个有机超分子化合物7。化合物1显示了在150℃的空气中加热时从绿色变为蓝色的热致变色行为。化合物3,4和7显示光致变色行为，在紫外线光，可见光或阳光下的浅黄色至绿色到绿色。已经讨论了它们的结构与铬行为之间的关系。通过红外光谱，粉末X射线衍射分析，UV-Vis吸收光谱，电子顺磁共振谱和X射线光电子能谱研究了热量/光致变色机制。结果证明了由热/光诱导的电子转移引起的viologen自由基的产生。发现化合物4可用作墨水和可擦除的印刷介质。此外，化合物3,4和7可用作QR码的抗假冒材料。我们的研究结果证明了在分子装置中施加热/光致变色配位聚合物的可能性。

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    Kan Wei-Qiu; He Yuan-Chun; Wen Shi-Zheng; Zhao Pu-Su;

  • 作者单位

    Huaiyin Normal Univ Sch Chem &

    Chem Engn Jiangsu Prov Key Lab Chem Low Dimens Mat Huaian 223300 Peoples R China;

    Qufu Normal Univ Coll Chem &

    Chem Engn Qufu 273165 Shandong Peoples R China;

    Huaiyin Normal Univ Sch Phys &

    Elect Elect Engn Jiangsu Prov Key Lab Modern Measurement Rchnol &

    Huaian 223300 Peoples R China;

    Huaiyin Normal Univ Sch Chem &

    Chem Engn Jiangsu Prov Key Lab Chem Low Dimens Mat Huaian 223300 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;无机化学;
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