氮原子取代苝二酰亚胺类衍生物的光/电性质

THE PHOTOPHYSICAL AND ELECTROCHEMICAL PROPERTIES OF PERYLENE- TETRACABOXYLIC DIIMIDE DERIVATIVES SUBSTITUTION AT THE N ATOM

用紫外可见吸收光谱、荧光光谱和循环伏安法等方法分别测量了化合物1a-6a在相同条件下的电子吸收光谱、荧光光谱、最大摩尔消光系数(ε)、荧光量子产率(Φf)和LUMO值,并与苝二酰亚胺的相应性质进行了比较。化合物1a-6a的Φf值分别为0.98、0.95、0.91、0.89、0.87、0.91,化合物1a-4a的LUMO值分别为-3.45、-3.51、-3.61、-3.69。在氮原子上引入取代基可以对苝二酰亚胺类衍生物的荧光性质和电化学性质产生影响,影响程度略有差别。

The fluorescence quantum yield（ Φf）,molar extinction coefficient（ ε） and LUMO energy levels of perylene- tetracaboxylic diimide（ PDI） derivatives substitution at the N atom under the same conditions were characterized by using UV- vis spectroscopy,fluorescence spectroscopy and cyclic voltammetry（ CV） traping technique. The Φfvalue is 0. 98,0. 95,0. 91,0. 89,0. 87 and0. 91; the LUMO energy levels is- 3. 45,- 3. 51,- 3. 61and- 3. 69. It has been shown that fluorescence and the electron affinity of PDI can be tuned by substitution at the N atom of the carboxydiimid（ peri- position） as well as at bay position. However substitution at former position,perturbs the electronic properties more effectively than the photophysical properties.