Intramolecular charge transfer with N-benzoylaminonaphthalenes. 1-Aminonaphthalene versus 2-aminonaphthalene as electron donors
作者:Xuan Zhang、Chun-Hua Liu、Li-Hong Liu、Fang-Ying Wu、Lin Guo、Xiang-Ying Sun、Chao-Jie Wang、Yun-Bao Jiang
DOI:10.1039/b210106h
日期:2003.2.11
derivatives in cyclohexane and was assigned to the CT state by the observation of a substantial red shift with increasing solvent polarity or with increasing electron-withdrawing ability of the substituent. The CT emission energies were found to follow a linear relationship with the Hammett constant of the substituent and the value of the linear slope for 1-NBAs (-0.45 eV) was higher than that of 2-NBAs (-0
制备了在苯甲酰基苯环的对位或间位具有不同取代基的N-(取代-苯甲酰基)-1-氨基萘和N-(取代-苯甲酰基)-2-氨基萘(1-NBA和2-NBA)使用类苯甲酰苯胺电荷转移作为探针反应,探测1-氨基萘(1-AN)和2-氨基萘(2-AN)之间的差异。对于在环己烷中所有制备的氨基萘衍生物,发现了异常的长波发射,并且通过观察到随着溶剂极性的增加或取代基的吸电子能力的增加而发生的大幅度红移,将其分配为CT状态。发现CT发射能量与取代基的Hammett常数和1-NBA(-0。45 eV高于2-NBA(-0.35 eV),后者与苯胺衍生物(BAs,-0.345 eV)接近。这表明在1-NBA的CT状态下,电荷分离的程度更高,其中完全放电分离是通过CT发射能量的线性下降率为-1.00的降低电势依赖性建立的。通过观察发现,当对位,间位和对位时,苯甲酰基取代的BA的相应线性斜率保持不变,从而排除了1-NBA和2