摘要
Two star-shaped molecules with benzene core and three naphthalene diimide （NDI） side arms were facilely prepared by two-step imidization reaction from the 1,4,5,8-naphthalenetetracarboxylic dianhydride. Two com- pounds showed the similar UV-Vis absorption band as well as NDI. It was found that they displayed bathochromic shift of their UV-Vis absorption and emission spectra in film compared with that in solution, ascribing to the aggregation between molecules in the solid state. Reversible reduction process was observed by cyclic voltammetry and low lying LUMO energy levels （-3.83 eV for la, -3.87 eV for lb） were deduced, which suggest that these two compounds possessed good electron-acceptor property and can be used as potential n-type materials.
Two star-shaped molecules with benzene core and three naphthalene diimide （NDI） side arms were facilely prepared by two-step imidization reaction from the 1,4,5,8-naphthalenetetracarboxylic dianhydride. Two com- pounds showed the similar UV-Vis absorption band as well as NDI. It was found that they displayed bathochromic shift of their UV-Vis absorption and emission spectra in film compared with that in solution, ascribing to the aggregation between molecules in the solid state. Reversible reduction process was observed by cyclic voltammetry and low lying LUMO energy levels （-3.83 eV for la, -3.87 eV for lb） were deduced, which suggest that these two compounds possessed good electron-acceptor property and can be used as potential n-type materials.
基金
The authors acknowledge the financial support from National Natural Science Foundation of China （Nos. 21676113, 21402057, 21472059）
the Ministry-Province Jointly Constructed Base for State Key Lab-Shenzhen Key Laboratory of Chemical Biology, Shenzhen
Ministry of Education and the self-determined research funds of CCNU from the colleges＇ basic research and operation of MOE （No. CCNU16A02004）
The National Natural Science Foundation of China （No. 21302043）
Plan For Scientific Innovation Talent of Henan University of Technology （No. 2013CXRC10）
Key Scientific Research Projects of Henan Province （No. 16A 150005）
Young Scholar Training Program of Henan University of Technology （No. 001170）.
