Fig. 4: Anomalous fluorescence response and structural transition of dynaCOF-330 upon adaptive docking and inclusion of 1,4-dioxane vapour.
From: Guest-adaptive molecular sensing in a dynamic 3D covalent organic framework
a Optical images of dynaCOF-330 under 365-nm UV lights showing the fluorescence turn-on and intensity changes for representative equilibrium pressures and uptake of 1,4-dioxane vapour at 298 K. b Quantitative in-situ fluorescence spectroscopy of dynaCOF-330 showing constant maxima of emission wavelength. c Lattice parameters refined from ex-situ PXRD of dynaCOF-330 at representative equilibrium pressures of 1,4-dioxane vapour. d Evolution of crystal structures of dynaCOF-330 upon docking and adaptive inclusion of various numbers of 1,4-dioxane molecules per cell. (Colour codes: C, black and grey; N, blue; O, red; H, white. Connolly pore surfaces are shown in grey and green.). e The variation of dihedral angle changes of the anthracene plane between the selected time and the initial one, and the insert figure for the plane defined by the three carbon atoms marked by the orange circle.
