Complex Self-Organization in <i>n</i>-Alkylammonium Sulfobetaine Zwitterions with High Thermal Stabilities and High Expansion Coefficients.

ABSTRACT: Sulfobetaine zwitterions made from n-alkyl dimethylamines and butanesultone yield a series of n-alkylammonium sulfobetaine zwitterions with complex self-organization behavior. The compounds are thermally quite stable and the length of the alkyl chain directly affects all phase transition temperatures of the compounds: the longer the alkyl chain, the higher the transition temperature. All compounds exhibit lamellar order and the different phases are characterized by a lower temperature orthorhombic and a higher temperature hexagonal in-plane order. The phase transition from the orthorhombic to the hexagonal phase is always associated with an increase of the long period. The phase transition is also associated with a rather high thermal expansion coefficient.

SUBMITTER: Lange A 

PROVIDER: S-EPMC11875396 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature