Spontaneous wormlike micelles formed in a single-tailed zwitterionic surface-active ionic liquid aqueous solution.
Wormlike micelles were successfully fabricated by the self-assembly of a single-tailed zwitterionic surface-active ionic liquid (SAIL), 3-(1-hexadecyl-3-imidazolio) propanesulfonate β-naphthalene sulfonate (C16IPS-Nsa), in aqueous solutions without any additives. With increasing zwitterionic SAIL concentration, spontaneous transition from micelles to wormlike micelles and then a hexagonal phase occurs. Interestingly, the wormlike micelles are closed, stretched and directionally arranged, which was rarely found in previous research studies. This kind of wormlike micelle is useful to serve as novel soft template in the synthesis of functional materials.1H NMR illustrated that the introduced π-π stacking and hydrophobic interactions originated from the hydrophobic aromatic counterions are responsible for the structural transformation. Density functional theory (DFT) simulated the optimum configuration of C16IPS-Nsa and calculated the interaction energy of C16IPS-Nsa-H2O is 39.6 kJ mol-1. This work paves the way for regulating the self-assembly structures of amphiphiles through changing specific weak interactions.
Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, China. lqzheng@sdu.edu.cn.
Panpan
P
Sun
Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, China. lqzheng@sdu.edu.cn.
Fei
F
Lu
Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, China. lqzheng@sdu.edu.cn.
Aoli
A
Wu
Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China. shilijuan@tyut.edu.cn.
Lijuan
L
Shi
Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, China. lqzheng@sdu.edu.cn.
Liqiang
http://orcid.org/0000-0002-6619-8051
L
Zheng