The dynamical signature and scaling of supramolecular assemblies

Abstract

We present a brief overview of current investigations on the dynamics of supramolecular assemblies, with the focus on applying broadband dielectric spectroscopy (BDS) combined with different techniques. The dielectric methods have significant advantages in probing the dynamical signature and scaling of supra-structures. We summarize various mechanisms describing supramolecular dynamics, which could produce a relaxation governed by supramolecular association slower than the glass-transition-related structural relaxation. Next, we also discuss the relaxation dynamics in phase-separated supramolecular assemblies and supramolecular assembly under nanoconfinement, for controlling bonus macroscopic performances. This perspective emphasizes the idea that the relaxational response of supramolecular assemblies is generic to some extent. It does not necessarily depend on the chemistry of associations, but could reflect supra-materials’ behaviors determined by their molecular architectures.

Keywords

• Dielectric spectroscopy
• Shear rheology
• Relaxation dynamics
• Supramolecular interactions
• Debye relaxation