fitting as shown in Fig. 12. Studies on the presence of this effect in various molecules
showed that k nr increased in many cases and k fl sometimes increased by complexing
with clay depending on the type of molecule [38]. Two theories, namely, structure
Fig. 11 The fluorescence enhancement behavior of 1,3,5-tris[(N-pyridinium)aniline-4-yl]-benzene
(TPAB) by complexing with clay. Reproduced with permission from the American Chemical
Society with a slight modification [49]
Fig. 12 Fluorescence decay profile and fluorescence lifetimes (τ) of porphyrins excited with and
without clay in water. The porphyrin loadings on the clay surface were 5 Â 10
À4 molecules nm
À2
.
Reproduced with permission from the American Chemical Society with a slight modification [40]
Tuning Emission Properties by Dye Encapsulation into Layered Silicates
197
showed that k nr increased in many cases and k fl sometimes increased by complexing
with clay depending on the type of molecule [38]. Two theories, namely, structure
Fig. 11 The fluorescence enhancement behavior of 1,3,5-tris[(N-pyridinium)aniline-4-yl]-benzene
(TPAB) by complexing with clay. Reproduced with permission from the American Chemical
Society with a slight modification [49]
Fig. 12 Fluorescence decay profile and fluorescence lifetimes (τ) of porphyrins excited with and
without clay in water. The porphyrin loadings on the clay surface were 5 Â 10
À4 molecules nm
À2
.
Reproduced with permission from the American Chemical Society with a slight modification [40]
Tuning Emission Properties by Dye Encapsulation into Layered Silicates
197