To realize the solid materials with higher emission quantum yield from the rhodamine 6G (R6G) monomers, typical laser-dye, we hybridized both alkyltrimethylammonium (CnTMA+) and R6G cations into the laponite (Lap) interlayer nanospace and investigated their photoemission and nanostructure. The hybrid solid materials were prepared by dissolving an appropriate amount of CnTMA+Br− powder with Lap ethanol/aqueous (1/1 v/v) suspension with 0.1% or 0.5% cation-exchange capacity (CEC) of R6G cations. From X-ray diffraction (XRD) and 13C cross-polarization magic-angle spinning (CP MAS) NMR of the present solid materials, it was found that CnTMA+ cations were incorporated as the trans−gauche form into the Lap interlayer nanospace and R6G cations were intercalated parallel to the surface of Lap nanosheet. Emission quantum yield, ϕ, of the R6G/CnTMA+/Lap solid materials became higher than that of R6G/Lap and increased with increasing carbon number in alkyl chain, n, and was a constant as ca. 80% beyond n > 10. The R6G/C16TMA+/Lap solid material prepared under optimal conditions exhibited ca. 80% ϕ, even when the molar concentration of R6G cation was 10−2 mol/dm3.

In this Article, we elucidate the structural and thermoelectric properties of stannite-kuramite solid solutions, Cu(2+x)Fe(1-x)SnS(4-y) (x = 0-1), with sulfur defects (y) ≤ 0.4. Structural analysis revealed that anisotropy decreases and Cu/Sn disorder increases with an increase in x. The samples with x = 0.8-1 exhibit degenerate conduction, whereas the Seebeck coefficient (S) remains relatively high, S ≈ 100 μV K(-1) for x = 0.8 at 300 K. Thermal conductivities (κ) of the solid solutions are in the range 10(-3)-10(-2) W cm(-1) K(-1), which is close to the κ value of silicon dioxide. The dimensionless figure of merit (ZT) reaches 0.044 for x = 0.8 at 300 K. The ZT is enhanced significantly by an increase in temperature and is doubly larger than that of x = 0 at 300 K. These findings allow us to attain higher ZT values through optimization of chemical composition.

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To develop solid materials with high luminescence, the preparation of laser-dye rhodamine 6G (R6G)/clay hybrid thin solid films with surfactant molecules as aggregation suppressors was investigated. Dodecyltrimethylammonium cations were found to be very effective for inhibiting dye aggregation in the clay interlayer space. Consequently, this material showed light emission from the R6G monomer.