Fluorescein dye intercalated layered double hydroxides for chemically stabilized photoluminescent indicators on inorganic surfaces.
A new photoactive thin film of layered double hydroxide (LDH) nanocrystals containing fluorescein dyes (LDH-F) has been developed by self-assembly of the LDH nanocrystals and well-controlled intercalation of the dyes in organic media. XRD results and absorption spectra confirmed the highly oriented interlayer arrangement of the dianionic form of the fluorescein dyes in the LDH interlayers, in which the dye molecules were electrostatically immobilized between the positively charged LDH layers with a monolayer packing structure. An intensity weighted average PL lifetime was estimated to be 1.45 ns and fluorescence lifetime imaging microscopy revealed that the individual LDH nanocrystals on the LDH-F film had largely similar lifetimes, which were ascribed to the uniform loading of fluorescein dyes onto the LDH matrix without photoluminescence quenching.
Department of Chemistry, The Catholic University of Korea, Bucheon, Gyeonggi 420-743, Korea.
Jong Hyeon
JH
Lee
Duk-Young
DY
Jung
Eunchul
E
Kim
Tae Kyu
TK
Ahn
D065966:Absorption, Physicochemical; D005456:Fluorescent Dyes / Q000138:chemical synthesis* / Q000737:chemistry; D006878:Hydroxides / Q000138:chemical synthesis* / Q000737:chemistry; D008163:Luminescent Measurements; D008856:Microscopy, Fluorescence; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D055672:Static Electricity; D013499:Surface Properties; D014961:X-Ray Diffraction
D005456:Fluorescent Dyes; D006878:Hydroxides; D009942:Organometallic Compounds