Bondsionic

Bondsionic is a proposed state of interaction in which the dynamics of chemical bonding and ionic motion are tightly coupled, producing coordinated rearrangements of bonds as mobile ions migrate. In this framework, bonds are not static features of a lattice but participate in a transferable, partially ionic character that accompanies ionic transport. The term blends "bond" and "ionic" to describe a coupling between bond-order fluctuations and ion diffusion, with the aim of explaining transport phenomena in certain solids.

It is discussed mainly in theoretical and speculative contexts relating to solid-state chemistry and materials science. Potentially relevant systems include solid electrolytes, perovskite-like oxides, and metal-organic or covalent-organic frameworks where dynamic bonding environments interact with mobile charge carriers. In this view, transient bond rearrangements accompany ion hops, effectively coupling electronic structure to diffusion pathways and possibly lowering activation barriers for movement.

Investigations employ computational methods such as density functional theory and ab initio molecular dynamics, alongside spectroscopic techniques capable of capturing rapid bond fluctuations and ion motion. Researchers seek signatures of synchronized bond-order changes with diffusion events, for example correlated shifts in vibrational modes and local geometry during ion transport. The approach remains controversial, and clear experimental confirmation is an active area of debate.

Applications, if validated, could inform design principles for more efficient solid electrolytes and ion-conducting materials, enabling improved battery performance and sensors. Critics warn that the concept may describe already-known coupling between lattice dynamics and diffusion, rather than a distinct "bondonic" mechanism. Proponents emphasize that explicit demonstration of concerted bond reorganization would represent a new mode of charge transport.