An unexpected solvent effect on the self-assembly of a 1,7-bis-pyridinoyl perylene diimide amphiphile.
In this paper, we report that a 1,7-bis-pyridinoyl perylene diimide amphiphile undergoes distinctly different self-assembly in methanol compared to ethanol. This amphiphile forms hollow nanospheres in methanol, whereas in ethanol, it self-assembles into microrose flowers which consist of several soft nanoplates packing like rose petals. Studies of the concentration-dependent absorption spectra confirmed this solvent effect. The most distinct spectral features were the A(0-0)/A(0-1) and A(0-0)/A(S)(0-)(S)(2) values. These spectral changes were explained in terms of the Franck-Condon factors.
Xu
Shuangping
S
Institute of Polymer Materials, Qingdao University, No. 308 Ningxia Road, Qingdao 266071, People's Republic of China.
Sun
Jin
J
Ke
Damei
D
Song
Guojun
G
Zhang
Wei
W
Zhan
Chuanlang
C