Preparation and Characterization of Rhodamine 6G/Alkyltrimethylammonium/Laponite Hybrid Solid Materials with Higher Emission Quantum Yield

Abstract

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.

Photophysical and antibacterial properties of complex systems based on smectite, a cationic surfactant and methylene blue

“…More than additive effects are expected for ternary systems that also contain C12 cations. The presence of C12 cations with disinfectant biocide properties would additionally suppress dye molecular aggregation [18,19] and thus potentially increase dye photoactivity. MB, as another component of these complexes, has already been described as a compound with antimicrobial and disinfectant properties.…”

Harvesting light energy by iridium(iii) complexes on a clay surface

“…[1][2][3][4][5][6][7][8][9][10][11][12][13] One approach is to fix a photoresponsive species into the cavities of macromolecular hosts. [21][22][23][24][25][26][27][28][29][30][31][32] Cyclometalated iridium(III) complexes have recently attracted attention as potentially useful photosensitizers with a high quantum yield and long lifetime. [21][22][23][24][25][26][27][28][29][30][31][32] Cyclometalated iridium(III) complexes have recently attracted attention as potentially useful photosensitizers with a high quantum yield and long lifetime.…”

Energy transfer in hybrid Langmuir–Blodgett films of iridium complexes and synthetic saponite: dependence of transfer efficiency on the interlayer distance

“…[13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] Among inorganic supports, clay minerals are unique as two-dimensional materials intercalating photo-responsive molecules. [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] The extent of energy transfer between donor and acceptor molecules intercalated in interlayer spaces was estimated previously. 29,30 Recently cyclometalated iridium(III) complexes (denoted as Ir(III) complexes) have been attracting extensive attention due to their highly emitting properties in the visible region.…”