A color-tunable luminescent material with functionalized graphitic carbon nitride as multifunctional supports

• Luminescent material exhibits multi-color emissions when excited by single wavelength.
• The energy trsnsfer between functionalized g-C3N4 and europium matches very vell.
• Functionalized g-C3N4 exhibits excitation wavelength-depengdent bright blue luminescence.
• Functionalized g-C3N4 layer provided as multifunctional supports.

A color-tunable luminescent material was prepared based on the composition of functionalized graphitic carbon nitride (g-C3N4) and europium (III). The functionalized g-C3N4 layers not only behave as multifunctional supports including ligand coordinated with europium (III) and a support structure for the formation of the luminescent material, but exhibit excitation wavelength-dependent luminescence, thus the energy transfer between the functionalized g-C3N4 and europium (III) can match very well by controlling the emission wavelength of functionalized g-C3N4. The as-prepared materials was comprehensively characterized via X-ray photoelectron spectroscopy, Fourier Transform Infrared spectroscopy, X-ray scattering techniques, Ultraviolet and Visible spectrophotometer, fluorescence spectrophotometer, thermogravimetric analysis, etc. The luminescent material exhibits multi-color emissions which are consistent with the characteristic emissions of europium (III) and functionalized g-C3N4, and the photoluminescence quality and density of the europium (III) can be greatly enhanced. The brilliant optical properties of the materials make them suiting for multipurpose applications in practical fields.

Schematic illustration of the synthesis and basic composition of the luminescent material. Inset figures were luminescence emission spectra of g-C3N4 (A), europium (III) complex (a) and luminescent material (b) with the same concentration in (B) (Kex=350 nm) and photographs of (left) H2O and (right) the H2O dispersion of luminescence emission spectra under 350 nm UV radiation. The energy transfer in the luminescent material matchs very well and it exhibits multi-color emissions simultaneously. The enhanced photoluminescence quality and density of the europium (III) makes them suiting for multipurpose applications in practical fields.Figure optionsDownload as PowerPoint slide