PREPARATION AND CHARACTERIZATION OF HIGHLY PHOTOLUMINESCENT HYBRID SOLIDS FROM ANIONIC FLUORESCEIN DYE, SURFACTANT, AND LAYERED DOUBLE HYDROXIDE

Abstract

Highly photoluminescent solids were prepared via hybridization of anionic fluorescein dye (AFD) and 1-alkylsulfonate (C_nS, n: number of carbons in the alkyl chain) salts with layered double hydroxide (LDH). When both C_nS and AFD anions were incorporated in the interlayer nanospace of LDH, it was found that the LDH/AFD/C_nS hybrid solid materials exhibited monomeric photoluminescence (PL) with high quantum yield. It was not possible to obtain high PL from AFD hybridized with LDH alone; without C_nS, the PL of AFD was not completely monomeric even when the concentration of incorporated AFD was extremely low. Notably, the C_4S anion was most effective for inhibiting aggregation of AFD incorporated in the interlayer space of LDH.