A series of hybrids based on Tb-doped Zn-Al layered double hydroxides (Tb-LDHs) combined with tryptophan (hereafter shortened as Try) were synthesized by soft-chemical method. The composition, structure, and fluorescence of the Tb-LDH/Try hy-brids were analyzed by various characterizations. Compositional analysis indicated that the content of tryptophan present in the hybrids gradually increased while the Tb-LDH reacted with 0.05, 0.1, and 0.25 mol/L Try solution, respectively. XRD results revealed that new reflections appeared in the Tb-LDH/Try hybrids. TGA curves of the Tb-LDH/Try hybrids were different from that of Tb-LDH and Try. IR spectra manifested that the IR spectra of the hybrids were characteristic of the Try and Tb-LDH. Fluorescent spectra sug-gested that the green emission due to5D4→7F5 transition of Tb3+ greatly decreased but not quenched, and the emission attributed to Try obviously increased. Meanwhile the fluorescent spectra of Tb-LDH/Try hybrids presented broad continuous bands in visible region.
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