Protonation of Pyridyl-Substituted TTF Derivatives: Substituent Effects in Solution and in the Proton-Electron Correlated Charge-Transfer Complexes
作者:Sang Chul Lee、Akira Ueda、Akiko Nakao、Reiji Kumai、Hironori Nakao、Youichi Murakami、Hatsumi Mori
DOI:10.1002/chem.201302614
日期:2014.2.10
ethylenedithio (EDT) group. Among 2‐PyH+‐TTF (1 oH+), 3‐PyH+‐TTF (1 mH+), 4‐PyH+‐TTF (1 pH+), and 4‐PyH+‐EDT‐TTF (2 pH+) systems, the para‐pyridyl‐substituted donors 1 pH+ and 2 pH+ exhibit more marked changes upon protonation in solution; a larger redshift in the intramolecular CT absorption band and a larger decrease in the electron‐donating ability. Furthermore, the EDT system 2 pH+ has the smallest intramolecular
质子化的吡啶基取代的四硫富瓦电子给体分子(PYH + -TTF)显示相比于中性类似物的给电子能力和HOMO-LUMO能隙的变化显著和给予了独特Ñ + H⋅⋅⋅N氢键质子-电子相关的电荷转移(CT)复杂晶体中的(H键)二聚体单元。我们已经从PyH + -TTF衍生物的分子结构,即Py基团的取代位置和/或是否存在乙二硫(EDT)基团的角度评估了这些特征。在2‐PyH + ‐TTF(1 o H +),3‐PyH + ‐TTF(1 mH +),4-PyH + -TTF(1 p H +)和4-PyH + -EDT-TTF(2 p H +)系统,对-吡啶基取代的供体1 p H +和2 p H +溶液中的质子化表现出更明显的变化;分子内CT吸收带的红移更大,给电子能力的下降更大。此外,EDT系统2 p H +具有最小的分子内库伦排斥力。通过考虑通过量子化学计算获得的HOMO和LUMO的