title: An unexpected solvent effect on the self-assembly of a 1,7-bis-pyridinoyl perylene diimide amphiphile.
abstract: 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.
authors.affiliation: Institute of Polymer Materials, Qingdao University, No. 308 Ningxia Road, Qingdao 266071, People's Republic of China.
authors.forename: Shuangping
authors.initials: S
authors.lastname: Xu
authors.forename: Jin
authors.initials: J
authors.lastname: Sun
authors.forename: Damei
authors.initials: D
authors.lastname: Ke
authors.forename: Guojun
authors.initials: G
authors.lastname: Song
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.forename: Chuanlang
authors.initials: C
authors.lastname: Zhan