The synthesis and characterization of a new ligand system combining the redox-active backbone of Ar-BIANs (N,N′-bis[(aryl)imino]acenaphthenes) and a mixed-donor O–N–N–O salen-type binding pocket is reported. Complexes of Co²⁺, Ni²⁺, and UO₂²⁺ were prepared and characterized through single-crystal X-ray diffraction and electrochemical studies. The Ni²⁺ and Co²⁺ complexes have been used as references against which to compare the unique behaviors exhibited by the uranyl (UO₂²⁺) complex, as the latter forms two distinct solid-state structures with unusual oxo contacts to CH₂Cl₂ and CHCl₃ and displays a rich electrochemical profile that indicates a wide range of accessible metal oxidation states through the formation of mixed-valent U(VI)/U(V) and U(V)/U(IV) species in solution.

中文翻译：

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四齿B配体的铀酰二聚体和过渡金属配合物的结构表征和氧化还原活性

一种新的配体系统的合成和表征，该系统结合了Ar-BIANs的氧化还原活性主链（N，N'-双[（芳基）亚氨基] ac烯）和混合供体O–N–N–O salen型结合口袋里有报道。制备了Co 2 ⁺，Ni ²⁺和UO ₂ ^2+的配合物，并通过单晶X射线衍射和电化学研究对其进行了表征。Ni ²⁺和Co ²⁺配合物已被用作参考，以比较铀酰（UO ₂ ²⁺）配合物表现出的独特行为，因为后者形成了两个截然不同的固态结构，并与CH ₂具有不同的氧代接触。氯₂和CHCl ₃并显示出丰富的电化学特征，通过在溶液中形成混合价的U（VI）/ U（V）和U（V）/ U（IV）物种，表明了广泛的可利用金属氧化态。