Fig. 1: The symmetry-breaking dynamics in the tautomeric 3D COF.
From: Symmetry-breaking dynamics in a tautomeric 3D covalent organic framework
a De-symmetry transformation of dynaCOF-301 from solvated (crystallised in tetragonal I41/a, sample colour: orange) to activated (crystallised in monoclinic I2/a, sample colour: red) and hydrated (crystallised in monoclinic I2/a, sample colour: dark brown) phases, exhibiting solvatochromic and hydrochromic effects. b Local chemical tautomerisation from symmetric diiminol (solvated) to asymmetric iminol/cis-ketoenamine (activated) resulting in compromised crystallinity and rapid exchange of configurations between iminol/cis-ketoenamine and cis-ketoenamine/iminol to achieve long-range ordering.
