title: Green Emission of Tb-doped Mg-Al Layered Double Hydroxide Response to L-lysine.
abstract: The paper describes a study on the green emission of a Tb-doped Mg-Al layered double hydroxide (Tb-LDH) response to L-lysine (Lys). Fluorescent study was found that the Tb-LDH exhibited strong green emission due to (5)D4-(7)FJ (J = 5, 6) transition of Tb(3+), and the green emission almost quenched while the Tb-LDH was exposed to 0.01, 0.05, 0.1, 0.25, and 0.5 mol·L(-1) Lys solution, respectively. Meanwhile the emission attributed to Lys markedly increased as the Tb-LDH was exposed to 0.01 and 0.05 mol·L(-1) Lys solution, then decreased as the concentration of Lys solution further increased to 0.5 from 0.05 mol·L(-1). The green emission of Tb-LDH optimal response to Lys happened at 0.05 mol·L(-1) of Lys solution. XRD results revealed that no reflections ascribed to Lys appeared in the composites of Tb-LDH and Lys. IR spectra suggested that the IR spectra of Tb-LDH obviously changed after it was exposed to Lys solution. These results indicated that the green emission of Tb-LDH response to Lys was possibly owing to interaction between the Tb-LDH and Lys. Moreover, this interaction between the Tb-LDH and Lys may be resulted from absorption. The green emission of Tb-LDH response to Lys would be potential application in detecting L-lysine.
authors.affiliation: College of Chemistry, Nanchang University, Nanchang, 330031, China. yfchen@ncu.edu.cn.
authors.forename: Yufeng
authors.initials: Y
authors.lastname: Chen
authors.affiliation: College of Chemistry, Nanchang University, Nanchang, 330031, China.
authors.forename: Yao
authors.initials: Y
authors.lastname: Bao
authors.affiliation: College of Chemistry, Nanchang University, Nanchang, 330031, China.
authors.forename: Xiaoqing
authors.initials: X
authors.lastname: Wang
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D006878:Hydroxides / Q000737:chemistry*; D008239:Lysine / Q000737:chemistry*; D008274:Magnesium / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013725:Terbium / Q000737:chemistry*
chemical_list: D006878:Hydroxides; D013725:Terbium; C031356:hydroxide ion; D000535:Aluminum; D008274:Magnesium; D008239:Lysine
keywords: Green emission; L-lysine; MgAl-LDH; Response; Tb-doped