Conformationally Controlled Electron Delocalization in n‐Type Rods: Synthesis, Structure, and Optical, Electrochemical, and Spectroelectrochemical Properties of Dicyanocyclophanes
作者:David Vonlanthen、Alexander Rudnev、Artem Mishchenko、Alexander Käslin、Jürgen Rotzler、Markus Neuburger、Thomas Wandlowski、Marcel Mayor
DOI:10.1002/chem.201003763
日期:2011.6.20
with various π‐backbone conformations and characteristic n‐type semiconductor properties is presented. Their synthesis, optical, structural, electrochemical, spectroelectrochemical, and packing properties are investigated. The X‐ray crystal structures of all n‐type rods allow the systematic correlation of structural features with physical properties. In addition, the results are supported by quantum mechanical
一系列dicyanobiphenylcyclophanes的1 - 6与各种π-主链构象和特性的n型半导体特性的呈现。研究了它们的合成,光学,结构,电化学,光谱电化学和堆积特性。所有n型棒的X射线晶体结构都可以使结构特征与物理性质进行系统的关联。另外,这些结果得到了基于密度泛函理论的量子力学计算的支持。对于所有n型杆,观察到两步还原过程,其中第一步是可逆的。还原处理之间的潜在间隙线性依赖于COS 2的扭转角的值φ在π系统之间。类似地,光学吸收光谱表明,共轭带相关因素的CoS的垂直激发能量2的扭转角的值φ。这些相关性表明,该分子内的固定扭转角φ是主导因素确定这些模型化合物电子离域的程度,并且该角度φ在固态结构测定是用于在溶液中的分子构象的好代理。光谱电化学研究表明,即使在自由基阴离子形式下,构象刚性也得以保持。特别是,对应于SOMO–LUMO + i的吸收带跃迁发生了红移,而与HOMO–SO