Knowledge Check Colour of transition metal ions are due to absorption of some wavelength. This results in A1. d-s transition B2. s-s transition C3. s-d transition D4. d-d transitionSubmit The colours of the transition metal are due to d-d excitation. The energy required for d-d el...
The crystal structures determined by Rietveld refinement of PXRD data revealed that in the smaller trivalent-metal-substituted lyonsite oxides, the MIII ions occupy the octahedral (8d, 4c) sites and the lithium ions occur exclusively at the trigonal-prismatic (4c) site in the orthorhombic (Pnma)...
We describe the synthesis, crystal structures, and optical absorption spectra/colours of 3d transition-metal-substituted lyonsite-type oxides Li3Al1- xMIIIx(MoO4)3 (0 III = Cr, Fe) and Li3- xAl1- xMII2 x(MoO4)3 (0 II = Co, Ni, Cu). The oxides were readily synthesized by the ...
However, existing transparent hydrogels suffer from limitation of low and/or non-fine engineerable birefringence. Here, we invent a transparent magneto-birefringence hydrogel with large and finely engineerable optical anisotropy. The large optical anisotropy factor of the embedded magnetic two-dimensional ...
Natural photonic structure with tunable structural colours is one of the most miraculous structures which always catches our eyes. However, the application of artificial photonic structures is limited. Moreover, because of the ability of tunable colours, photonic structure is the excellent candidate for...
proven to be very effective58. The blue-green light of the Tb3+transition (5D4 → 7F6,5) is emitted by polychromatic relaxation and the energy is transferred to the5D1and5D0levels of the Eu3+by cross relaxation. The Eu3+ions absorb the energy from Tb3+and emit therefore orange ...
The crystal structures determined by Rietveld refinement of PXRD data revealed that in the smaller trivalent-metal-substituted lyonsite oxides, the MIII ions occupy the octahedral (8d, 4c) sites and the lithium ions occur exclusively at the trigonal-prismatic (4c) site in the ort...
The metal ions have no intrinsic absorption in the visible region (apart from the weak spin-forbidden bands of Mn 2+ ) and do not normally show charge-transfer absorption. The colours are ascribed to the n →π* transition of the violurate anion. As confirmation of this assignment the ...
Natural photonic structure with tunable structural colours is one of the most miraculous structures which always catches our eyes. However, the application of artificial photonic structures is limited. Moreover, because of the ability of tunable colours, photonic structure is the excellent candidate for...