Journal of Fluorescence ( IF 2.6 ) Pub Date : 2022-12-02 , DOI: 10.1007/s10895-022-03048-4 Hui Li 1 , Hongsheng Wang 1 , Wen Gu 2 , Xin Liu 2
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A new 3D metal–organic framework (Nd-MOF) {[Nd2L2]·2NH2(CH3)2·3H2O} was successfully established via a solvothermal method with Nd3+ ion and 5-(bis(4-carboxybenzyl) amino)–isophthalicacid (H4L), and has also been characterized by X-ray diffraction, powder X-ray diffraction (PXRD), IR and photoluminescence(PL)spectrum. The neodymium ions are free of coordinated solvents, and the Nd-MOF exhibits strong near-infrared (NIR) fluorescence. Besides, Its NIR fluorescence property shows low temperature resistance, which is favorable for being used in the low temperature environment. Besides, the fluorescence lifetime of Nd-MOF is 6.03 μs, and the quantum yield is 1.2%. The small quantum yield may owe to large energy gap between the T1 of the ligand H4L and the resonance energy level 4F3/2 of the Nd3+ ion, or due to large crystal size of the Nd-MOF.
Graphical Abstract
中文翻译：
基于三角苄胺配体的新型 Nd-MOF 的合成、结构和近红外荧光性能
以Nd 3+离子和5- ( bis ( _ _ _ _ _ _ 4-羧基苄基)氨基)-间苯二甲酸(H 4L), 并且还通过 X 射线衍射、粉末 X 射线衍射 (PXRD)、IR 和光致发光 (PL) 光谱进行了表征。钕离子不含配位溶剂，Nd-MOF 表现出强烈的近红外 (NIR) 荧光。此外，其近红外荧光特性表现出耐低温性，有利于在低温环境下使用。此外，Nd-MOF的荧光寿命为6.03 μs，量子产率为1.2%。小的量子产率可能归因于配体H 4 L的T1与Nd 3+离子的共振能级4 F 3/2之间的大能隙，或者归因于Nd-MOF的大晶体尺寸。
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