title: The formation of organogels and helical nanofibers from simple organic salts.
abstract: Simple organic salts based on aniline-derived cations and D-tartrate anions formed organogels and helical nanofibers. The organic salt (p-fluoroanilinium)(D-tartrate) was found to generate an organogel despite the absence of a hydrophobic alkyl chain, whereas (p-iodoanilinium)(D-tartrate) formed helical nanofibers in braided ropelike structures through a rolling-up process. The helicity of these nanofibers could be reversed by changing the growth solvent. The driving forces responsible for the formation of the nanofibers were determined to be 1D OH⋅⋅⋅O(-) hydrogen-bonding interactions between D-tartrate anions and π stacking of anilinium cations, as well as steric hindrance between the hydrogen-bonded chains.
authors.affiliation: Graduate School of Engineering, Tohoku University (Japan).
authors.forename: Yuya
authors.initials: Y
authors.lastname: Yoshii
authors.forename: Norihisa
authors.initials: N
authors.lastname: Hoshino
authors.forename: Takashi
authors.initials: T
authors.lastname: Takeda
authors.forename: Hiroki
authors.initials: H
authors.lastname: Moritomo
authors.forename: Jun
authors.initials: J
authors.lastname: Kawamata
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Nakamura
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Akutagawa
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D005782:Gels / Q000737:chemistry*; D054879:Halogenation; D006860:Hydrogen Bonding; D057927:Hydrophobic and Hydrophilic Interactions; D057139:Nanofibers / Q000737:chemistry* / Q000648:ultrastructure; D012492:Salts / Q000737:chemistry*; D013644:Tartrates / Q000737:chemistry*
chemical_list: D000814:Aniline Compounds; D005782:Gels; D012492:Salts; D013644:Tartrates; C023650:aniline; C029768:tartaric acid
keywords: gels; helical structures; hydrogen bonds; nanofibers; self assembly