Li Hui, Wang Hongsheng, Gu Wen, Liu Xin
Key Laboratory of Chemo/Biosensing and Detection, College of Chemical and Materials Engineering, Xuchang University, Xuchang, 461000, People's Republic of China.
Department of Chemistry and Laboratory of Advanced Energy Materials Chemistry (MOE), College of Chemistry, Nankai University, Tianjin, 300071, China.
J Fluoresc. 2023 Mar;33(2):595-599. doi: 10.1007/s10895-022-03048-4. Epub 2022 Dec 2.
A new 3D metal-organic framework (Nd-MOF) {[NdL]·2NH(CH)·3HO} was successfully established via a solvothermal method with Nd ion and 5-(bis(4-carboxybenzyl) amino)-isophthalicacid (HL), 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 HL and the resonance energy level F of the Nd ion, or due to large crystal size of the Nd-MOF.
通过溶剂热法，利用钕离子和5-(双(4-羧基苄基)氨基)间苯二甲酸(HL)成功构建了一种新型三维金属有机框架(Nd-MOF) {[NdL]·2NH(CH)·3HO}，并通过X射线衍射、粉末X射线衍射(PXRD)、红外光谱和光致发光(PL)光谱对其进行了表征。钕离子没有配位溶剂，Nd-MOF表现出强烈的近红外(NIR)荧光。此外，其近红外荧光特性具有低温耐受性，有利于在低温环境中使用。此外，Nd-MOF的荧光寿命为6.03 μs，量子产率为1.2%。量子产率较小可能归因于配体HL的T1与Nd离子的共振能级F之间的能隙较大，或者是由于Nd-MOF的晶体尺寸较大。
