Wavelength‐controlled dynamic processes are mostly based on light‐triggered isomerization or the cleavage/formation of molecular connections. Control over dynamic metathesis reactions by different light wavelengths, which would be useful in controllable dynamic chemistry, has rarely been studied. Taking advantage of the different bond energies of disulfide and diselenide bonds, we have developed a wavelength‐driven exchange reaction between disulfides and diselenides, which underwent metathesis under UV light to produce Se−S bonds. When irradiated with visible light, the Se−S bonds were reversed back to those of the original reactants. The conversion of the exchange depends on the wavelength of the incident light. This light‐driven metathesis chemistry was also applied to tune the mechanical properties of polymer materials. The visible‐light‐induced reverse reaction was compatible with reductant‐catalyzed disulfide/diselenide metathesis, and could be utilized to develop a dissipative system with light as the energy input.

中文翻译：

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波长控制的动态复分解：二硫键和二硒键之间的光驱交换反应

波长控制的动态过程主要基于光触发的异构化或分子连接的裂解/形成。很少研究通过不同的光波长控制动态复分解反应，这在可控动态化学中是有用的。利用二硫键和二硒键的不同键能，我们开发了波长驱动的二硫键和二硒键之间的交换反应，该反应在紫外光下易位，生成Se-S键。当用可见光照射时，Se-S键反向还原为原始反应物的键。交换的转换取决于入射光的波长。这种光驱动的复分解化学也被用于调节聚合物材料的机械性能。