Multinuclear NMR Study on the Formation and Polyol-Induced Deformation Mechanisms of Wormlike Micelles Composed of Cetyltrimethylammonium Bromide and 3-Fluorophenylboronic Acid

We had previously confirmed a glucose-responsive decrease in the viscosity of cetyltrimethylammonium bromide (CTAB) and phenylboronic acid (PBA) wormlike micelle (WLM) systems. However, mechanisms formation WLMs with glucose addition have not been determined. In this study, we elucidated using 3-fluorophenylboronic (3FPBA) based on 11B NMR 19F analyses. The system 60 mM CTAB/60 3FPBA at pH 7.4 demonstrated high viscoelasticity, was by rheological characteristics. spectrum revealed that existed neutral form sp2-hybridized boron; however, signal disappeared presence CTAB. contrast, studies indicated quaternary ammonium ion CTAB interacts phenyl group sp2 via cation−π interactions. PBA derivatives react various polyols; thus, investigated change viscous after sugar alcohols. decreased increased polyol concentration, especially those fructose mannitol, which apparent 40–160 polyols. spectra induced increase sp3 3FPBA. Based results, propose following mechanism response: (1) are stabilized interactions as driving force. (2) When is added to system, decreases its increases. (3) This means structural component decreases, induces disruption WLMs, decreases. deformation determined study notable because compound, whereas often anionic aromatic compounds WLMs. Without measurements, these would discovered.