Preparation of Transparent Film of Layered Double Hydroxide with Anionic Pyrene Derivatives and Its Luminous Toluene Detection Ability

Figure 9

Emission spectra of the Pyr⁻/LDH film immersed in toluene-ethanol solution (concentration of toluene (v/v) are 0%: black line, 10%: blue line, 30%: red line, 50%: sky-blue line, 70%: orange line, 90%: green line, and 100%: gray line).