title: Fluorescence of Zn-Al-Eu ternary layered hydroxide response to phenylalanine.
abstract: We reported the fluorescence of a Zn-Al-Eu ternary layered double hydroxide (LDH) response to an amino acid (phenylalanine) for the first time. As shown in fluorescence, the red emissions attributed to (5)D(0)-(7)F(J) transitions (J=1, 2, 3, 4) of Eu(3+) ions were quenched by the phenylalanine (Phe), and a strong blue emission at around 445 nm appeared. The fluorescent changes may be due to ligand-to-metal charges transfer, which was caused by the interaction between the Zn-Al-Eu LDH and Phe. This interaction was manifested by markedly different chemical shift positions of the Zn 3p(3/2), Al 2p, Eu 4d(3/2), O 1s, and C 1s peaks in the XPS spectra from those of the Zn-Al-Eu LDH and Zn-Al-Eu/Phe composite. Furthermore, the interaction between the LDH and Phe was supported by the results of X-ray diffraction (XRD) measurements, Fourier transform infrared (FT-IR) spectra, and thermogravimetric and differential thermogravimetric (TG-DTG) analysis. The fluorescence of Zn-Al-Eu LDH response to Phe may be potential application in biological techniques.
authors.affiliation: Department of Chemistry, Nanchang University, Nanchang 330031, China. yfchen@ncu.du.cn
authors.forename: Yufeng
authors.initials: Y
authors.lastname: Chen
authors.forename: Fei
authors.initials: F
authors.lastname: Li
authors.forename: Gensheng
authors.initials: G
authors.lastname: Yu
authors.forename: Xiaojing
authors.initials: X
authors.lastname: Yang
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D005063:Europium / Q000737:chemistry*; D006878:Hydroxides / Q000737:chemistry*; D010649:Phenylalanine / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D013050:Spectrometry, Fluorescence; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry; D014961:X-Ray Diffraction; D015032:Zinc / Q000737:chemistry*
chemical_list: D006878:Hydroxides; D005063:Europium; D010649:Phenylalanine; C031356:hydroxide ion; D000535:Aluminum; D015032:Zinc