Mapping Bridge Conformational Effects on Electronic Coupling in Mo<sub>2</sub>–Mo<sub>2</sub> Mixed-Valence Systems
作者:Huo Wen Chen、Suman Mallick、Shan Feng Zou、Miao Meng、Chun Y. Liu
DOI:10.1021/acs.inorgchem.8b01056
日期:2018.6.18
naphthalene series, the nine total mixed-valence complexes in three series complete a transition from the electronically uncoupled Class I to the strongly coupled Class II–III borderline via moderately coupled Class II and permit a systematic mapping of the bridge conformation effects on electronic coupling. Density functional theory calculations show that the HOMO–LUMO energy gap, corresponding to the
大桥连配体9,10- anthracenedicarboxylate及其硫醇化衍生物已被用来装配2个dimolybdenum复杂单元和发展3个沫2个二聚体,[沫2(DAniF)3 ] 2(μ-9,10-O 2 CC 14 ħ 8 CO 2),[沫2(DAniF)3 ] 2(μ-9,10- OSCC 14 ħ 8 COS)和[沫2(DAniF)3 ] 2(μ-9,10-S 2 CC 14 ħ 8 CS 2)(DAniF = N,N'-二(对-茴香基)甲ami酸酯),用于研究两个Mo 2之间电子耦合的构象依赖性中心。这些化合物的中心蒽环与Mo-Mo键矢量定义的平面存在较大偏差,并且随着桥联配体的螯合原子从O到S的变化,扭转角(ϕ = 50-76°)增大。因此,与亚苯基和萘类似物相反,相应的混合价络合物在近红外光谱中没有表现出特征性的间隔电荷转移吸收,在Robin-Day的方案中,这些亚苯基和萘