作者:Aaron Mailman、Craig M. Robertson、Stephen M. Winter、Paul A. Dube、Richard T. Oakley
DOI:10.1021/acs.inorgchem.9b00691
日期:2019.5.6
thiomethyl derivatives 6 (R = OAc, OMe, SMe). The crystal structures are based on ribbonlike arrays of radicals laced together by S···N′ and S···O′ secondary bonding interactions. The steric and electronic effects of the exocyclic ligands varies, affording one-dimensional (1D) π-stacked radicals for R = OAc, 1D cofacial dimer π-stacks for R = SMe, and a pseudo two-dimensional (2D) brick-wall arrangement
氧苯桥双(1,2-,3-二噻唑基)6作为单组分中性自由基导体的出色性能源自低位π-最低空位分子轨道的存在,这降低了电荷传输的潜在障碍并增加了金属态的动稳定能。作为不断努力修改这些所谓的多轨道材料的固态结构和传输性质的一部分,我们报告了乙酰氧基,甲氧基和硫代甲基衍生物6的制备和表征(R = OAc,OMe,SMe)。晶体结构基于通过S··N'和S··O'二次键合相互作用绑在一起的自由基的带状阵列。外环配体的空间和电子效应各不相同,R = OAc提供一维(1D)π堆积的基团,R = SMe提供1D界面二聚体π堆栈,并提供伪二维(2D)砖墙R = OMe的排列。变温磁性和导电率测量揭示了较强的反铁磁相互作用和莫特绝缘行为对于两个自由基系结构(R = OAC,OME),具有较低的室温电导率(σ RT ≈1×10 -4和〜1×10 –3 S cm –1分别)和更高的热活化能(E行动= 0.24和0.