Guest-Driven Light-Induced Spin Change in an Azobenzene Loaded Metal-Organic Framework
Guest-Driven Light-Induced Spin Change in an Azobenzene Loaded Metal-Organic Framework
复制标题
负载偶氮苯的金属有机框架中客体驱动的光致自旋变化
DOI：
10.1002/anie.202113294
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发表时间：
2021-11-17
影响因子：
16.6
通讯作者：
Tong, Ming-Liang
中科院分区：
文献类型：
--
作者：
Xie, Kai-Ping;Ruan, Ze-Yu;Tong, Ming-Liang
可以通过光可逆地切换的刺激响应材料引起了极大的兴趣。其中，光响应自旋交叉（SCO）配合物具有很大的希望，联合收割机结合的光活性输入与多方面的输出到开关材料和设备。然而，通过光致变色客体可逆地控制自旋态变化仍然是具有挑战性的。在此，我们报道了一个前所未有的客人驱动的光诱导自旋变化（GD-LISC）在霍夫曼型金属有机框架（MOF），[Fe（bpn）{Ag（CN）（2）}（2）].偶氮苯。（1，bpn= 1，4-双（4-吡啶基）萘）。在固态条件下，偶氮苯客体在紫外/维斯光照射下发生可逆的反-顺光异构化反应，在10-180 K的较宽温度范围内产生显著的磁性变化。这一发现不仅为SCO配合物建立了新的开关机制，而且为开发新一代光响应磁性材料铺平了道路。
Stimuli-responsive materials that can be reversibly switched by light are of immense interest. Among them, photo-responsive spin crossover (SCO) complexes have great promises to combine the photoactive inputs with multifaceted outputs into switchable materials and devices. However, the reversible control the spin-state change by photochromic guests is still challenging. Herein, we report an unprecedented guest-driven light-induced spin change (GD-LISC) in a Hofmann-type metal-organic framework (MOF), [Fe(bpn){Ag(CN)(2)}(2)].azobenzene. (1, bpn=1,4-bis(4-pyridyl)naphthalene). The reversible trans-cis photoisomerization of azobenzene guest upon UV/Vis irradiation in the solid-state results in the remarkable magnetic changes in a wide temperature range of 10-180 K. This finding not only establishes a new switching mechanism for SCO complexes, but also paves the way toward the development of new generation of photo-responsive magnetic materials.