Gating the photoactivity of azobenzene-type ligands trapped within a dynamic system of an M4L6 tetrahedral cage, an M2L2 metallocycle and mononuclear MLn complexes,Inorganic Chemistry Frontiers

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Gating the photoactivity of azobenzene-type ligands trapped within a dynamic system of an M4L6 tetrahedral cage, an M2L2 metallocycle and mononuclear MLn complexes
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2021-10-20 , DOI: 10.1039/d1qi01063h
Piotr Cecot _{1,

2} , Anna Walczak _{1,

2} , Grzegorz Markiewicz ₂ , Artur R. Stefankiewicz _{1,

2}

Affiliation

Complexation of transition metal ions by a doubly chelating bis(diimine)-type ligand incorporating a photoresponsive azobenzene linker yielded two types of structurally distinct metallosupramolecular architectures, an [M₄L₆]⁸⁺ tetrahedral cage and an [M₂L₂]⁴⁺ metallocycle. In solution, these complexes are open for reversible interconversions between each other by varying the M : L ratio, or switching into a dynamic library of [M(L′/L′′)_n]²⁺ mononuclear species upon addition of a competing monoamine. While the unbound ligand presents the reversible photoactivity of the azo bond, its complexes are photochemically inert, due to the inherent topology of these assemblies resulting from the restrictions of coordinate bond formation.

中文翻译：

对困在 M4L6 四面体笼、M2L2 金属环和单核 MLn 配合物的动态系统中的偶氮苯型配体的光活性进行门控

过渡金属离子通过双螯合双（二亚胺）型配体结合光响应偶氮苯连接体产生两种结构不同的金属超分子结构，[M ₄ L ₆ ] ⁸⁺四面体笼和 [M ₂ L ₂ ] ^{4 +}金属环。在解决方案中，这些复合物通过改变 M: L比率或切换到 [M( L' / L'' ) _n ] ²⁺的动态库中，可以实现彼此之间的可逆互变添加竞争性单胺后的单核物质。虽然未结合的配体表现出偶氮键的可逆光活性，但由于配位键形成的限制导致这些组件的固有拓扑结构，其配合物是光化学惰性的。

更新日期：2021-11-10

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