Fig. 2: Solubility and stability of CuI-Pyrphos in DMF.
From: High efficiency warm-white light-emitting diodes based on copper–iodide clusters
a, Photographs of the as-synthesized CuI-Pyrphos powder under ambient light (left) and the irradiation of ultraviolet light (365 nm) (right). b. The fine-structure model of the CuI-Pyrphos cluster. All hydrogen atoms are omitted for clarity. c, 31P NMR spectra of a P-m-(Tol)3 ligand, Pyrphos ligand and CuI-Pyrphos dissolved in DMF-d7. d, XANES spectra at Cu K-edge (E0 = 8,979 eV) versus photon energy of the standard copper foil, the standard CuO, the powder sample of CuI-Pyrphos and the solution sample of CuI-Pyrphos dissolved in DMF. e, The amplified near-edge region of the copper K-edge XANES spectra. f, FT[k3χ(k)] EXAFS data of the powder sample of CuI-Pyrphos. R, the interatomic distance in radial distribution function, in which the absorbing atom is located at the origin; ΔR, the phase shift. g, FT[k3χ(k)] EXAFS data of the solution sample of CuI-Pyrphos dissolved in DMF. h, In situ UV–vis absorption spectra during the precipitation process of CuI-Pyrphos powder formation. i, In situ photoluminescence spectra (λex = 375 nm) during the precipitation process of CuI-Pyrphos powder formation. a.u., arbitrary units.
