Fig. 6: Solvatochromic and hydrochromic effects, diiminol-iminol/cis-ketoenamine tautomerisation, and ordering-disordering transition of dynaCOF-301.
From: Symmetry-breaking dynamics in a tautomeric 3D covalent organic framework
a Quantitative spectra of dynaCOF-301a dosed with various organic vapours. b The relationship of the absorbance difference at 600 nm to the polarity and exposed solvents. c 13C CP-MAS solid-state NMR spectra with the assignment of chemical shifts indicated in the chemical structure. d Obvious colour change of dynaCOF-301a during H2O adsorption. e Quantitative spectra of dynaCOF-301a dosed with different amounts of H2O and corresponding energy bands. f Cyclic water uptakes under 50% RH by swinging temperatures between 25 and 65 °C. g Dynamic H2O vapour adsorption isotherm at 298 K. h In-situ PXRD patterns under various RHs N2 gas flows showing the variation of FWHM. i Contour plot of the in-situ PXRD patterns (red, adsorption; blue, desorption) under varied RHs N2 flow at room temperature.
