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Thermo- and light-triggered reversible interconversion of dysprosium–anthracene complexes and their responsive optical, magnetic and dielectric properties
Chemical Science ( IF 7.6 ) Pub Date : 2020-11-11 , DOI: 10.1039/d0sc04851h Xin-Da Huang 1 , Ge-Hua Wen 1 , Song-Song Bao 1 , Jia-Ge Jia 1 , Li-Min Zheng 1
Chemical Science ( IF 7.6 ) Pub Date : 2020-11-11 , DOI: 10.1039/d0sc04851h Xin-Da Huang 1 , Ge-Hua Wen 1 , Song-Song Bao 1 , Jia-Ge Jia 1 , Li-Min Zheng 1
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Artificial smart materials with switchable multifunctionality are of immense interest owing to their wide application in sensors, displays and memory devices. Lanthanide complexes are promising multifunctional materials integrating optical and magnetic characteristics. However, synergistic manipulation of different physical properties in lanthanide systems is still challenging. Herein we designed and synthesized a mononuclear complex [DyIII(SCN)3(depma)2(4-hpy)2] (1), which incorporates 9-diethylphosphonomethylanthracene (depma) as a photo-active component and 4-hydroxypyridine (4-hpy) as a polar component. This compound shows several unusual features: (a) reversible thermo-responsive phase transition associated with the order–disorder transition of 4-hpy and SCN−, which leads to thermochromic behavior and dielectric anomaly; (b) reversible photo-induced dimerization of anthracene groups, which leads to synergistic switching of luminescence, magnetic and dielectric properties. To our knowledge, compound 1 is the first example of lanthanide complexes that show stimuli-triggered synergistic and reversible switching of luminescence, magnetic and dielectric properties.
中文翻译：
热和光触发的镝-蒽配合物的可逆互变及其响应的光学、磁学和介电特性
具有可切换多功能的人工智能材料因其在传感器、显示器和存储设备中的广泛应用而引起了极大的兴趣。稀土配合物是一种很有前景的集光、磁特性于一体的多功能材料。然而，对镧系元素系统中不同物理性质的协同调控仍然具有挑战性。在此，我们设计并合成了一种单核配合物[Dy III (SCN) 3 (depma) 2 (4-hpy) 2 ] ( 1 )，其中包含9-二乙基膦酰基甲基蒽(depma)作为光活性成分和4-羟基吡啶(4 -hpy) 作为极性组分。该化合物显示出几个不寻常的特征：（a）与 4-hpy 和 SCN -的有序-无序转变相关的可逆热响应相变，从而导致热致变色行为和介电异常；（b）蒽基团的可逆光诱导二聚化，导致发光、磁性和介电性能的协同切换。据我们所知，化合物1是第一个表现出刺激触发的发光、磁性和介电特性协同和可逆转换的镧系配合物的例子。
更新日期：2020-11-19
中文翻译：
热和光触发的镝-蒽配合物的可逆互变及其响应的光学、磁学和介电特性
具有可切换多功能的人工智能材料因其在传感器、显示器和存储设备中的广泛应用而引起了极大的兴趣。稀土配合物是一种很有前景的集光、磁特性于一体的多功能材料。然而，对镧系元素系统中不同物理性质的协同调控仍然具有挑战性。在此，我们设计并合成了一种单核配合物[Dy III (SCN) 3 (depma) 2 (4-hpy) 2 ] ( 1 )，其中包含9-二乙基膦酰基甲基蒽(depma)作为光活性成分和4-羟基吡啶(4 -hpy) 作为极性组分。该化合物显示出几个不寻常的特征：（a）与 4-hpy 和 SCN -的有序-无序转变相关的可逆热响应相变，从而导致热致变色行为和介电异常；（b）蒽基团的可逆光诱导二聚化，导致发光、磁性和介电性能的协同切换。据我们所知，化合物1是第一个表现出刺激触发的发光、磁性和介电特性协同和可逆转换的镧系配合物的例子。
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