【作者】 陈玉凤； 鲍垚；

【Author】 Yufeng Chen;Yao Bao;College of Chemistry, Nanchang University;

【机构】 南昌大学化学学院；

【摘要】 本文采用软化学法合成了一系列基于Tb掺杂Zn Al-LDH和色氨酸的杂合物,并对杂合物的组成,结构和荧光进行了表征。组份分析表明,当Tb-doped Zn Al LDH分别与0.05,0.1,and 0.25mol·L-1的色氨酸溶液作用后,相应杂合物中色氨酸的含量依次增加。XRD结果表明杂合物中出现了新的衍射峰,这些衍射峰与LDH和色氨酸的衍射峰都不匹配。红外光谱表征结果发现,杂合物的红外光谱兼有LDH和色氨酸的红外光谱特征。荧光光谱结果表明,Tb-doped Zn Al LDH中出现了很强的源于Tb3+离子的5D4—7F5跃迁的绿光峰,而在杂合物中该绿光大大减弱,但并未猝灭,且杂合物的光谱覆盖在很宽的可见光区范围;同时源于色氨酸的荧光明显增强。更多还原

【Abstract】 A series of hybrids based on Tb-doped Zn-Al layered double hydroxides（Tb-LDHs） combined with tryptophan have been synthesized by soft-chemical method. The composition, structure, and fluorescence of the Tb-LDH/Try hybrids were analyzed by various characterizations. Compositional analysis indicated that the content of tryptophan present in the hybrids gradually increased while the Tb-LDH was reacted with 0.05, 0.1, and 0.25mol·L^-1 Try solution,respectively. XRD results revealed new reflections appeared in the Tb-LDH/Try hybrids. IR spectra manifested that the IR spectra of the hybrids were characteristic of the Try and Tb-LDH. Fluorescent spectra suggested that the green emission due to ⁵D₄—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 present broad continuous bands in visible region.更多还原