Synthesis, X-ray Structure, Optical, and Electrochemical Properties of a White-Light-Emitting Molecule
AbstractA new white-light-emitting molecule (1) was synthesized and characterized by NMR spectroscopy, high resolution mass spectrometry, and single-crystal X-ray diffraction. Compound 1 crystallizes in the orthorhombic space group Pnma, with a = 12.6814(6), b = 7.0824(4), c = 17.4628(9) Å, α = 90°, β = 90°, γ = 90°. In the crystal, molecules are linked by weak intermolecular C-H···O hydrogen bonds, forming an infinite chain along , generating a C(10) motif. Compound 1 possesses an intramolecular six-membered-ring hydrogen bond, from which excited-state intramolecular proton transfer (ESIPT) takes place from the phenolic proton to the carbonyl oxygen, resulting in a tautomer that is in equilibrium with the normal species, exhibiting a dual emission that covers almost all of the visible spectrum and consequently generates white light. It exhibits one irreversible one-electron oxidation and two irreversible one-electron reductions in dichloromethane at modest potentials. Furthermore, the geometric structures, frontier molecular orbitals (MOs), and the potential energy curves (PECs) for 1 in the ground and the first singlet excited state were fully rationalized by density functional theory (DFT) and time-dependent DFT calculations. The results demonstrate that the forward and backward ESIPT may happen on a similar timescale, enabling the excited-state equilibrium to be established. View Full-Text
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Hu, J.-W.; Wu, Y.-H.; Tsai, H.-Y.; Chen, K.-Y. Synthesis, X-ray Structure, Optical, and Electrochemical Properties of a White-Light-Emitting Molecule. Materials 2016, 9, 48.
Hu J-W, Wu Y-H, Tsai H-Y, Chen K-Y. Synthesis, X-ray Structure, Optical, and Electrochemical Properties of a White-Light-Emitting Molecule. Materials. 2016; 9(1):48.Chicago/Turabian Style
Hu, Jiun-Wei; Wu, Ying-Hsuan; Tsai, Hsing-Yang; Chen, Kew-Yu. 2016. "Synthesis, X-ray Structure, Optical, and Electrochemical Properties of a White-Light-Emitting Molecule." Materials 9, no. 1: 48.
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